210-537: The dog ( Canis familiaris or Canis lupus familiaris ) is a domesticated descendant of the wolf . Also called the domestic dog , it was selectively bred from an extinct population of wolves during the Late Pleistocene by hunter-gatherers . The dog was the first species to be domesticated by humans , over 14,000 years ago and before the development of agriculture . Experts estimate that due to their long association with humans, dogs have gained
420-420: A "broad" definition: "a coevolutionary process that arises from a mutualism, in which one species (the domesticator) constructs an environment where it actively manages both the survival and reproduction of another species (the domesticate) in order to provide the former with resources and/or services." He comments that this adds niche construction to the activities of the domesticator. Domestication syndrome
630-402: A "difference in motivation" between wolves and dogs. Some puppies and dogs engage in coprophagy out of habit, stress, for attention, or boredom; most of them will not do it later in life. A study hypothesizes that the behavior was inherited from wolves, a behavior likely evolved to lessen the presence of intestinal parasites in dens. Most dogs can swim. In a study of 412 dogs, around 36.5% of
840-467: A 2024 UK study analyzing 584,734 dogs, it was concluded that purebred dogs lived longer than crossbred dogs, challenging the previous notion of the latter having the higher life expectancies. The authors noted that their study included " designer dogs " as crossbred and that purebred dogs were typically given better care than their crossbred counterparts, which likely influenced the outcome of the study. Other studies also show that fully mongrel dogs live about
1050-821: A Spanish language segment of Oceania, and included the Desventuradas Islands, Easter Island, the Galápagos Islands, Guadalupe Island, the Juan Fernández Islands, the Revillagigedo Islands and Salas y Gómez. Cocos Island and Malpelo Island were not explicitly referenced in the book, despite being areas which would fall within this range. All other islands associated with Latin American countries were excluded, as they are continental in nature, unlike Guadalupe Island and
1260-703: A U.S. state in 1947, and as such was part of the original UN definition of Oceania. The island states of Indonesia, Japan, the Philippines, Singapore and Taiwan, all located within the bounds of the Pacific or associated marginal seas, are excluded from the UN definition. The states of Hong Kong and Malaysia , located in both mainland Asia and marginal seas of the Pacific, are also excluded, as are Brunei , East Timor and Indonesian New Guinea/Western New Guinea . The CIA World Factbook also categorizes Oceania as one of
1470-418: A chief Hotu Matuꞌa discovered the island in one or two large canoes with his wife and extended family. They are believed to have been Polynesian . Around 1200, Tahitian explorers discovered and began settling the area. This date range is based on glottochronological calculations and on three radiocarbon dates from charcoal that appears to have been produced during forest clearance activities. Moreover,
1680-508: A continent like Africa, Asia and America." Scottish geographer John Bartholomew wrote in 1873 that, "the New World consists of North America , and the peninsula of South America attached to it. These divisions [are] generally themselves spoken as continents, and to them has been added another, embracing the large island of Australia and numerous others in the [Pacific] Ocean, under the name of Oceania. There are thus six great divisions of
1890-641: A control method for overpopulation. Neutering often occurs as early as 6–14 weeks in shelters in the US. The American Society for the Prevention of Cruelty to Animals (ASPCA) advises that dogs not intended for further breeding should be neutered so that they do not have undesired puppies that may later be euthanized. However, the Society for Theriogenology and the American College of Theriogenologists made
2100-860: A few have been domesticated, including squid , cuttlefish and octopus , all used in research on behaviour and neurology . Terrestrial snails in the genera Helix are raised for food. Several parasitic or parasitoidal insects, including the fly Eucelatoria , the beetle Chrysolina , and the wasp Aphytis are raised for biological control. Conscious or unconscious artificial selection has many effects on species under domestication; variability can readily be lost by inbreeding, selection against undesired traits, or genetic drift, while in Drosophila , variability in eclosion time (when adults emerge) has increased. Humans foraged for wild cereals, seeds, and nuts thousands of years before they were domesticated; wild wheat and barley, for example, were gathered in
2310-750: A fifth grand division of the world." He also viewed Oceania as covering Australia, New Zealand, the Malay Archipelago and the islands of Melanesia, Micronesia, and Polynesia. In 1887, the Royal Asiatic Society of Great Britain and Ireland referred to Australia as the area's westernmost land, while in 1870, British Reverend Alexander Mackay identified the Bonin Islands as its northernmost point, and Macquarie Island as its southernmost point. The Bonin Islands at that time were
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#17328015019042520-635: A joint statement that opposes mandatory neutering; they said that the cause of overpopulation in the US is cultural. Neutering is less common in most European countries, especially in Nordic countries —except for the UK, where it is common. In Norway, neutering is illegal unless for the benefit of the animal's health (e.g., ovariohysterectomy in case of ovarian or uterine neoplasia). Some European countries have similar laws to Norway, but their wording either explicitly allows for neutering for controlling reproduction or it
2730-484: A means of communication between far-flung places through the exploitation of the pigeon's homing instinct; research suggests it was domesticated as early as 10,000 years ago. Chicken fossils in China have been dated to 7,400 years ago. The chicken's wild ancestor is Gallus gallus , the red junglefowl of Southeast Asia. The species appears to have been kept initially for cockfighting rather than for food. Two insects ,
2940-498: A natural instinct called prey drive (the term is chiefly used to describe training dogs ' habits) which can be influenced by breeding. These instincts can drive dogs to consider objects or other animals to be prey or drive possessive behavior. These traits have been enhanced in some breeds so that they may be used to hunt and kill vermin or other pests. Puppies or dogs sometimes bury food underground . One study found that wolves outperformed dogs in finding food caches, likely due to
3150-487: A north–south position in calm magnetic field conditions. Dogs' vision is dichromatic ; their visual world consists of yellows, blues, and grays. They have difficulty differentiating between red and green, and much like other mammals, the dog's eye is composed of two types of cone cells compared to the human's three. The divergence of the eye axis of dogs ranges from 12 to 25°, depending on the breed, which can have different retina configurations. The fovea centralis area of
3360-468: A population bottleneck where genetic drift is enhanced by the small population size. Mutations can also be fixed in a population by a selective sweep . Mutational load can be increased by reduced selective pressure against moderately harmful traits when reproductive fitness is controlled by human management. However, there is evidence against a bottleneck in crops, such as barley, maize, and sorghum, where genetic diversity slowly declined rather than showing
3570-506: A population of 70,000,000, and commented that, "brown and yellow races constitute the vast majority" and that the minority of whites were mainly "owners and rulers". Hutton Webster's 1919 book Medieval and Modern History also considered Oceania to encompass all islands in the Pacific, stating that, "the term Oceania, or Oceanica, in its widest sense applies to all the Pacific Islands." Webster broke Oceania up into two subdivisions;
3780-645: A possession of Britain; Macquarie Island, to the south of Tasmania , is a subantarctic island in the Pacific. It was politically associated with Australia and Tasmania by 1870. Alfred Russel Wallace believed in 1879 that Oceania extended to the Aleutian Islands , which are among the northernmost islands of the Pacific. The islands, now politically associated with Alaska , have historically had inhabitants that were related to Indigenous Americans , in addition to having non-tropical biogeography similar to that of Alaska and Siberia . Wallace insisted while
3990-779: A predictable supply of a resource, resulting in mutual benefits . She noted further that it is not synonymous with agriculture since agriculture depends on domesticated organisms but does not automatically result from domestication. Michael D. Purugganan notes that domestication has been hard to define, despite the "instinctual consensus" that it means "the plants and animals found under the care of humans that provide us with benefits and which have evolved under our control." He comments that insects such as termites , ambrosia beetles , and leafcutter ants have domesticated some species of fungi , and notes further that other groups such as weeds and commensals have wrongly been called domesticated. Starting from Zeder's definition, Purugganan proposes
4200-425: A protracted coevolutionary process with multiple stages along different pathways. There are three proposed major pathways that most mammal domesticates followed into domestication: Humans did not intend to domesticate mammals from either the commensal or prey pathways, or at least they did not envision a domesticated animal would result from it. In both of those cases, humans became entangled with these species as
4410-579: A province of New Guinea) in the west to Galápagos Islands (Equador) and Easter Island (Chile) in the east." In a 1980 report on venereal diseases in the South Pacific, the British Journal of Venereal Diseases categorized the Desventuradas Islands, Easter Island, the Galápagos Islands and the Juan Fernández Islands as being in an eastern region of the South Pacific, along with areas such as Pitcairn Islands and French Polynesia, but noted that
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#17328015019044620-575: A rapid initial fall at the point of domestication. Further, the genetic diversity of these crops was regularly replenished from the natural population. Similar evidence exists for horses, pigs, cows, and goats. At least three groups of insects, namely ambrosia beetles, leafcutter ants, and fungus-growing termites, have domesticated species of fungi . Ambrosia beetles in the weevil subfamilies Scolytinae and Platypodinae excavate tunnels in dead or stressed trees into which they introduce fungal gardens, their sole source of nutrition. After landing on
4830-548: A recent study which included radiocarbon dates from what is thought to be very early material suggests that the island was discovered and settled as recently as 1200. Oceania was first explored by Europeans from the 16th century onwards. Portuguese navigators, between 1512 and 1526, reached the Maluku Islands (by António de Abreu and Francisco Serrão in 1512), Timor , the Aru Islands (Martim A. Melo Coutinho),
5040-574: A result, much evidence is based on linguistic analysis. The earliest archaeological traces of civilization have been found on the island of Saipan , dated to 1500 BCE or slightly before. The ancestors of the Micronesians settled there over 4,000 years ago. A decentralized chieftain-based system eventually evolved into a more centralized economic and religious culture centred on Yap and Pohnpei . The prehistories of many Micronesian islands such as Yap are not known very well. The first people of
5250-490: A set of social-cognitive abilities in domestic dogs that are not possessed by the dog's canine relatives or other highly intelligent mammals, such as great apes , are parallel to children's social-cognitive skills. Most domestic animals were initially bred for the production of goods. Dogs, on the other hand, were selectively bred for desirable behavioral traits. In 2016, a study found that only 11 fixed genes showed variation between wolves and dogs. These gene variations indicate
5460-547: A significant non-indigenous European population, numbering around 71,000. Conversely, New Caledonia has still had a similar history to the rest of Melanesia, and their French -speaking Europeans make up only 27% of the total population. As such, it is not also culturally considered a part of the predominantly English-speaking Australasia. Some cultural and political definitions of Australasia include most or all of Melanesia, due to its geographical proximity to Australia and New Zealand, but these are rare. Australia, New Zealand and
5670-457: A steady supply of resources, such as meat, milk, or labor. The process is gradual and geographically diffuse, based on trial and error. Domestication affected genes for behavior in animals, making them less aggressive. In plants, domestication affected genes for morphology, such as increasing seed size and stopping the shattering of cereal seedheads. Such changes both make domesticated organisms easier to handle and reduce their ability to survive in
5880-455: A study of Boxer litters, 22% of puppies died before reaching 7 weeks of age. Stillbirth was the most frequent cause of death, followed by infection. Mortality due to infection increased significantly with increases in inbreeding. Dog behavior has been shaped by millennia of contact with humans. They have acquired the ability to understand and communicate with humans and are uniquely attuned to human behaviors. Behavioral scientists suggest that
6090-534: A study of seven dog breeds (the Bernese Mountain Dog , Basset Hound , Cairn Terrier , Brittany , German Shepherd Dog , Leonberger , and West Highland White Terrier ), it was found that inbreeding decreases litter size and survival. Another analysis of data on 42,855 Dachshund litters found that as the inbreeding coefficient increased, litter size decreased and the percentage of stillborn puppies increased, thus indicating inbreeding depression. In
6300-402: A suitable tree, an ambrosia beetle excavates a tunnel in which it releases its fungal symbiont . The fungus penetrates the plant's xylem tissue, extracts nutrients from it, and concentrates the nutrients on and near the surface of the beetle gallery. Ambrosia fungi are typically poor wood degraders and instead utilize less demanding nutrients. Symbiotic fungi produce and detoxify ethanol, which
6510-512: A superior sense of smell, and a relatively large olfactory cortex . They perform many roles for humans, such as hunting , herding , pulling loads , protection , companionship , therapy , aiding disabled people , and assisting police and the military . Communication in dogs includes eye gaze, facial expression, vocalization, body posture (including movements of bodies and limbs), and gustatory communication (scents, pheromones, and taste). They mark their territories by urinating on them, which
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6720-474: A working animal. Among invertebrates , the silkworm and the western honey bee were domesticated over 5,000 years ago for silk and honey , respectively. The domestication of plants began around 13,000–11,000 years ago with cereals such as wheat and barley in the Middle East , alongside crops such as lentil , pea , chickpea , and flax . Beginning around 10,000 years ago, Indigenous peoples in
6930-697: A workshop hosted by the IUCN /Species Survival Commission's Canid Specialist Group considered the dingo and the New Guinea singing dog to be feral Canis familiaris . Therefore, it did not assess them for the IUCN Red List of threatened species . The earliest remains generally accepted to be those of a domesticated dog were discovered in Bonn-Oberkassel , Germany. Contextual , isotopic , genetic , and morphological evidence shows that this dog
7140-544: A year longer on average than dogs with pedigrees. Furthermore, small dogs with longer muzzles have been shown to have higher lifespans than larger medium-sized dogs with much more depressed muzzles. For free-ranging dogs, less than 1 in 5 reach sexual maturity, and the median life expectancy for feral dogs is less than half of dogs living with humans. In domestic dogs, sexual maturity happens around six months to one year for both males and females, although this can be delayed until up to two years of age for some large breeds. This
7350-600: Is Australia, and the largest city is Sydney . Puncak Jaya in Indonesia is the highest peak in Oceania at 4,884 m (16,024 ft). The first settlers of Australia, New Guinea, and the large islands just to the east arrived more than 60,000 years ago. Oceania was first explored by Europeans from the 16th century onward. Portuguese explorers, between 1512 and 1526, reached the Tanimbar Islands , some of
7560-402: Is a domestic animal that likely travelled a commensal pathway into domestication (i.e. humans initially neither benefitted nor were harmed by wild dogs eating refuse from their camps). The questions of when and where dogs were first domesticated remains uncertain. Genetic studies suggest a domestication process commencing over 25,000 years ago, in one or several wolf populations in either Europe,
7770-648: Is a notable genus with 5 species in which dogs are the definitive host . Additionally, dogs are a source of zoonoses for humans. They are responsible for 99% of rabies cases worldwide; however, in some developed countries such as the UK, rabies is absent from dogs and is instead only transmitted by bats. Other common zoonoses are hydatid disease , leptospirosis , pasteurellosis , ringworm , and toxocariasis . Common infections in dogs include canine adenovirus , canine distemper virus , canine parvovirus , leptospirosis , canine influenza , and canine coronavirus . All of these conditions have vaccines available. Dogs are
7980-429: Is allowed in practice or by contradiction through other laws. Italy and Portugal have passed recent laws that promote it. Germany forbids early age neutering, but neutering is still allowed at the usual age. In Romania, neutering is mandatory except for when a pedigree to select breeds can be shown. A common breeding practice for pet dogs is to mate them between close relatives (e.g., between half- and full-siblings). In
8190-405: Is an attractant for ambrosia beetles and likely prevents the growth of antagonistic pathogens and selects for other beneficial symbionts. Ambrosia beetles mainly colonise wood of recently dead trees. The leafcutter ants are any of some 47 species of leaf-chewing ants in the genera Acromyrmex and Atta . The ants carry the discs of leaves that they have cut back to their nest, where they feed
8400-466: Is associated with impulsive behaviors , anxiety behaviors, and fear of unfamiliar noise, people, or animals. Some dog breeds are hairless, while others have a very thick corded coat. The coats of certain breeds are often groomed to a characteristic style, for example, the Yorkshire Terrier 's "show cut". A dog's dewclaw is the fifth digit in its forelimb and hind legs. Dewclaws on
8610-524: Is certainly not necessary to consider the Hawaiian Islands and Australia as being in the same part of the world, it is however permissible to unite in one group all the islands which are scattered over the great ocean. It should be remarked that if we take the Malay Archipelago away from Oceania, as do generally the German geographers, the insular world contained in the great ocean is cut in two, and
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8820-432: Is domesticated wheat, which relies on farmers for its reproduction and dissemination. Domesticated plants differ from their wild relatives in many ways, including Plant defenses against herbivory , such as thorns, spines, and prickles , poison, protective coverings, and sturdiness may have been reduced in domesticated plants. This would make them more likely to be eaten by herbivores unless protected by humans, but there
9030-672: Is estimated that 4% to 6% of the genome in Melanesians (e.g. Papua New Guinean and Bougainville Islander) derives from the Denisova hominin , an ancient human species discovered in 2010, while no Eurasians or Africans displayed contributions of the Denisovan genes. The original inhabitants of the group of islands now named Melanesia were likely the ancestors of the present-day Papuan -speaking people. Migrating from Southeast Asia, they appear to have occupied these islands as far east as
9240-497: Is evidence of genetic and linguistic interchange between Australians in the far north and the Austronesian peoples of modern-day New Guinea and the islands, but this may be the result of recent trade and intermarriage . They reached Tasmania c. 40,000 years ago by migrating across a land bridge from the mainland that existed during the last ice age . It is believed that the first early human migration to Australia
9450-846: Is geologically a partially submerged volcanic extension of the Aleutian Range on the Alaskan mainland. He did not include the volcanic Kuril Islands and Ryukyu Islands, which similarly border both the Eurasian Plate and the Pacific Plate, nor did he include the neighbouring Kodiak archipelago in the North Pacific Ocean, which is firmly situated on the North American Plate. The Stockholm Journal of East Asian Studies stated in 1996 that Oceania
9660-577: Is geologically part of the Japanese Archipelago , but that has been administered by Russia since World War II . Hong Kong, partly located in another marginal sea of the Pacific (the South China Sea ) was also included in his definition. Australia and New Zealand were grouped together by Flick as Australasia, and categorized as being in the same area of the world as the islands of Oceania. Flick estimated this definition of Oceania had
9870-636: Is in spite of the geographical distance separating these areas from Hawaiʻi, which technically lies in the North Pacific. The 1985 edition of the South Pacific Handbook also groups the Galápagos Islands as being in Polynesia, while noting that they are not culturally a part of the subregion. The islands are typically grouped with others in the southeastern Pacific that were never inhabited by Polynesians. The Bonin Islands are in
10080-573: Is largely continental in character, New Zealand's are clearly insular; and neither Commonwealth realm has close ties with Asia." In his 2002 book Oceania: An Introduction to the Cultures and Identities of Pacific Islanders , Andrew Strathern excluded Okinawa and the rest of the Ryukyu Islands from his definition of Oceania, but noted that the islands and their indigenous inhabitants "show many parallels with Pacific island societies." In
10290-447: Is more likely when entering a new environment. Over the millennia, dogs became uniquely adapted to human behavior; this adaptation includes being able to understand and communicate with humans. As such, the human–canine bond has been a topic of frequent study, and dogs' influence on human society has given them the sobriquet of " man's best friend ". The global dog population is estimated at 700 million to 1 billion, distributed around
10500-460: Is not found in any other canid . In the 2005 edition of Mammal Species of the World , mammalogist W. Christopher Wozencraft listed the wolf as a wild subspecies of Canis lupus and proposed two additional subspecies: familiaris , as named by Linnaeus in 1758, and dingo , named by Meyer in 1793. Wozencraft included hallstromi (the New Guinea singing dog) as another name ( junior synonym ) for
10710-669: Is only weak support for most of this. Farmers did select for reduced bitterness and lower toxicity and for food quality, which likely increased crop palatability to herbivores as to humans. However, a survey of 29 plant domestications found that crops were as well-defended against two major insect pests ( beet armyworm and green peach aphid ) both chemically (e.g. with bitter substances) and morphologically (e.g. with toughness) as their wild ancestors. During domestication, crop species undergo intense artificial selection that alters their genomes, establishing core traits that define them as domesticated, such as increased grain size. Comparison of
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#173280150190410920-663: Is opposed by many veterinary and animal welfare organisations such as the American Veterinary Medical Association and the British Veterinary Association . Evidence from veterinary practices and questionnaires showed that around 500 dogs would need to have their tail docked to prevent one injury. Numerous disorders have been known to affect dogs. Some are congenital and others are acquired. Dogs can acquire upper respiratory tract diseases including diseases that affect
11130-747: Is significant divergence in terms of skull shape between types. The three basic skull shapes are the elongated dolichocephalic type as seen in sighthounds , the intermediate mesocephalic or mesaticephalic type, and the very short and broad brachycephalic type exemplified by mastiff type skulls. The jaw contains around 42 teeth, and it has evolved for the consumption of flesh. Dogs use their carnassial teeth to cut food into bite-sized chunks, more especially meat. Dogs' senses include vision, hearing, smell, taste, touch, and magnetoreception . One study suggests that dogs can feel small variations in Earth's magnetic field . Dogs prefer to defecate with their spines aligned in
11340-695: Is the most prominent sense of the species; it detects chemical changes in the environment, allowing dogs to pinpoint the location of mating partners, potential stressors, resources, etc. Dogs also have an acute sense of hearing up to four times greater than that of humans. They can pick up the slightest sounds from about 400 m (1,300 ft) compared to 90 m (300 ft) for humans. Dogs have stiff, deeply embedded hairs known as whiskers that sense atmospheric changes, vibrations, and objects not visible in low light conditions. The lower most part of whiskers hold more receptor cells than other hair types, which help in alerting dogs of objects that could collide with
11550-529: Is the smallest continent in land area and the second-least populated after Antarctica . Oceania has a diverse mix of economies from the highly developed and globally competitive financial markets of Australia , French Polynesia , Hawaii , New Caledonia , and New Zealand , which rank high in quality of life and Human Development Index , to the much less developed economies of Kiribati , Papua New Guinea , Tuvalu , Vanuatu , and Western New Guinea . The largest and most populous country in Oceania
11760-668: Is the suite of phenotypic traits that arose during the initial domestication process and which distinguish crops from their wild ancestors . It can also mean a set of differences now observed in domesticated mammals, not necessarily reflecting the initial domestication process. The changes include increased docility and tameness, coat coloration, reductions in tooth size, craniofacial morphology, ear and tail form (e.g., floppy ears), estrus cycles, levels of adrenocorticotropic hormone and neurotransmitters, prolongations in juvenile behavior, and reductions in brain size and of particular brain regions. The domestication of animals and plants
11970-441: Is the terminal appendage of the vertebral column , which is made up of a string of 5 to 23 vertebrae enclosed in muscles and skin that support the dog's back extensor muscles. One of the primary functions of a dog's tail is to communicate their emotional state. The tail also helps the dog maintain balance by putting its weight on the opposite side of the dog's tilt, and it can also help the dog spread its anal gland 's scent through
12180-402: Is the time at which female dogs will have their first estrous cycle , characterized by their vulvas swelling and producing discharges , usually lasting between 4 and 20 days. They will experience subsequent estrous cycles semiannually, during which the body prepares for pregnancy . At the peak of the cycle, females will become estrous, mentally and physically receptive to copulation . Because
12390-483: Is the word often used by continental geographers to describe the great world of islands we are now entering upon" and that "Australia forms its central and most important feature." He did not explicitly label Oceania a continent in the book, but did note that it was one of the six major divisions of the world. The Oxford Handbook of World History (2011) describes the areas encompassed in Oceania as being "afterthoughts in world history texts, lumped together and included at
12600-725: Is today Baluchistan in Pakistan. In East Asia 8,000 years ago, pigs were domesticated from wild boar genetically different from those found in the Fertile Crescent. The cat was domesticated in the Fertile Crescent, perhaps 10,000 years ago, from European wildcats , possibly to control rodents that were damaging stored food. The domestication of vertebrate animals is the relationship between non-human vertebrates and humans who have an influence on their care and reproduction. In his 1868 book The Variation of Animals and Plants Under Domestication , Charles Darwin recognized
12810-636: Is widely grown for food. The yeast Saccharomyces cerevisiae have been used for thousands of years to ferment beer and wine , and to leaven bread . Mould fungi including Penicillium are used to mature cheeses and other dairy products, as well as to make drugs such as antibiotics . Selection of animals for visible traits may have undesired consequences for the genetics of domestic animals. A side effect of domestication has been zoonotic diseases. For example, cattle have given humanity various viral poxes , measles , and tuberculosis ; pigs and ducks have contributed influenza ; and horses have brought
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#173280150190413020-471: The Caroline Islands and west New Guinea . Spanish and Dutch explorers followed, then British and French. On his first voyage in the 18th century, James Cook , who later arrived at the highly developed Hawaiian Islands , went to Tahiti and followed the east coast of Australia for the first time. The arrival of European settlers in subsequent centuries resulted in a significant alteration in
13230-1039: The Cook Islands , Federated States of Micronesia , French Polynesia , Fiji, Guam , Kiribati , the Marshall Islands, Nauru , New Caledonia, New Zealand, Niue , the Northern Mariana Islands , Palau , Papua New Guinea, Pitcairn Islands , Samoa , the Solomon Islands, Tokelau , Tonga , Tuvalu , Vanuatu , Wallis and Futuna , and the United States Minor Outlying Islands ( Baker Island , Howland Island , Jarvis Island , Midway Atoll , Palmyra Atoll , and Wake Island ). The original UN definition of Oceania from 1947 included these same countries and semi-independent territories, which were mostly still colonies at that point. Hawaii had not yet become
13440-527: The English-speaking world , Oceania is generally considered a continent , while Mainland Australia is regarded as its continental landmass . Spanning the Eastern and Western hemispheres, at the centre of the water hemisphere , Oceania is estimated to have a land area of about 9,000,000 square kilometres (3,500,000 sq mi) and a population of around 44.4 million as of 2022. Oceania
13650-721: The Farallones off California, and the Chinchas off Peru are—to all intents and purposes, only detached bits of the adjoining shores. But in the case of the Galápagos, at least, this is different." The Juan Fernández Islands and the neighbouring Desventuradas Islands are today seen as the easternmost extension of the Indo-West Pacific biogeographic region. The islands lie on the Nazca Plate with Easter Island and
13860-718: The Indian Ocean and those in the Pacific Ocean . The coconut experienced a founder effect , where a small number of individuals with low diversity founded the modern population, permanently losing much of the genetic variation of the wild population. Population bottlenecks which reduced variation throughout the genome at some later date after domestication are evident in crops such as pearl millet , cotton , common bean and lima bean . In wheat, domestication involved repeated hybridization and polyploidy . These steps are large and essentially instantaneous changes to
14070-434: The Late Pleistocene . DNA sequences show that all ancient and modern dogs share a common ancestry and descended from an ancient, extinct wolf population that was distinct from any modern wolf lineage. Some studies have posited that all living wolves are more closely related to each other than to dogs, while others have suggested that dogs are more closely related to modern Eurasian wolves than to American wolves. The dog
14280-634: The Levant at least 23,000 years ago. Neolithic societies in West Asia first began to cultivate and then domesticate some of these plants around 13,000 to 11,000 years ago. The founder crops of the West Asian Neolithic included cereals ( emmer , einkorn wheat , barley ), pulses ( lentil , pea , chickpea , bitter vetch ), and flax . Other plants were independently domesticated in 13 centers of origin (subdivided into 24 areas) of
14490-518: The Malay Archipelago , north of Australia, mainly lie on the continental shelf of Asia, and their inhabitants had more exposure to mainland Asian culture as a result of this closer proximity. The geographer Conrad Malte-Brun coined the French expression Terres océaniques (Oceanic lands) c. 1804. In 1814 another French cartographer, Adrien-Hubert Brué, coined from this expression
14700-505: The Tanimbar Islands , some of the Caroline Islands (by Gomes de Sequeira in 1525), and west Papua New Guinea (by Jorge de Menezes in 1526). In 1519, a Spanish expedition led by Ferdinand Magellan sailed down the east coast of South America, found and sailed through the strait that bears his name and on 28 November 1520 entered the ocean which he named "Pacific". The three remaining ships, led by Magellan and his captains Duarte Barbosa and João Serrão , then sailed north and caught
14910-485: The U.S. military ). This is due to their location in the centre of the Pacific, their biogeography and their oceanic geology. Less isolated oceanic islands that were once uninhabited, such as the Bonin Islands, the Galápagos Islands and the Juan Fernández Islands, have since been sparsely populated by citizens of their political administrators. Archaeological evidence suggests that Micronesians may have lived on
15120-606: The United States ; Clipperton Island, a possession of France ; the Juan Fernández Islands , belonging to Chile; and Macquarie Island , belonging to Australia. The United Nations (UN) has used its own geopolitical definition of Oceania since its foundation in 1947, which utilizes four of the five subregions from the 19th century: Australasia, Melanesia, Micronesia, and Polynesia. This definition consists of discrete political entities, and so excludes
15330-619: The coding DNA of chromosome 8 in rice between fragrant and non-fragrant varieties showed that aromatic and fragrant rice, including basmati and jasmine , is derived from an ancestral rice domesticate that suffered a deletion in exon 7 which altered the coding for betaine aldehyde dehydrogenase (BADH2). Comparison of the potato genome with that of other plants located genes for resistance to potato blight caused by Phytophthora infestans . In coconut , genomic analysis of 10 microsatellite loci (of noncoding DNA ) found two episodes of domestication based on differences between individuals in
15540-470: The domestication of wheat . Wild wheat shatters and falls to the ground to reseed itself when ripe, but domesticated wheat stays on the stem for easier harvesting. This change was possible because of a random mutation in the wild populations at the beginning of wheat's cultivation . Wheat with this mutation was harvested more frequently and became the seed for the next crop. Therefore, without realizing it, early farmers selected for this mutation. The result
15750-417: The domestication syndrome , traits presumed essential in the early stages of domestication, while others represent later improvement traits. Domesticated mammals in particular tend to be smaller and less aggressive than their wild counterparts; other common traits are floppy ears, a smaller brain, and a shorter muzzle. Domestication traits are generally fixed within all domesticates, and were selected during
15960-563: The equator , such as Chiloé Island, Macquarie Island, Tasmania, and the southern portions of mainland Australia and New Zealand, were not included in this category. According to the 1998 book Encyclopedia of Earth and Physical Sciences , Oceania refers to Australasia, Melanesia, Micronesia, Polynesia, and more than 10,000 islands scattered across the Pacific Ocean. It notes that, "the term [has] also come under scrutiny by many geographers. Some experts insist that Oceania encompasses even
16170-402: The mammary glands , ovaries , and other reproductive organs . However, neutering increases the risk of urinary incontinence in bitches, prostate cancer in dogs, and osteosarcoma , hemangiosarcoma , cruciate ligament rupture , pyometra , obesity , and diabetes mellitus in either sex. Neutering is the most common surgical procedure in dogs less than a year old in the US and is seen as
16380-1165: The nasal cavity , the larynx , and the trachea ; lower respiratory tract diseases which includes pulmonary disease and acute respiratory diseases; heart diseases which includes any cardiovascular inflammation or dysfunction of the heart; haemopoietic diseases including anaemia and clotting disorders ; gastrointestinal disease such as diarrhoea and gastric dilatation volvulus ; hepatic disease such as portosystemic shunts and liver failure ; pancreatic disease such as pancreatitis ; renal disease ; lower urinary tract disease such as cystitis and urolithiasis ; endocrine disorders such as diabetes mellitus , Cushing's syndrome , hypoadrenocorticism , and hypothyroidism ; nervous system diseases such as seizures and spinal injury ; musculoskeletal disease such as arthritis and myopathies ; dermatological disorders such as alopecia and pyoderma ; ophthalmological diseases such as conjunctivitis , glaucoma , entropion , and progressive retinal atrophy ; and neoplasia . Common dog parasites are lice , fleas , fly larvae , ticks , mites , cestodes , nematodes , and coccidia . Taenia
16590-471: The ova survive and can be fertilized for a week after ovulation, more than one male can sire the same litter. Fertilization typically occurs two to five days after ovulation. After ejaculation , the dogs are coitally tied for around 5–30 minutes because of the male's bulbus glandis swelling and the female's constrictor vestibuli contracting; the male will continue ejaculating until they untie naturally due to muscle relaxation . 14–16 days after ovulation,
16800-437: The rhinoviruses . Many parasites , too, have their origins in domestic animals. Alongside these, the advent of domestication resulted in denser human populations, which provided ripe conditions for pathogens to reproduce, mutate, spread, and eventually find a new host in humans. Scholars have expressed widely differing viewpoints on domestication's effects on society. Anarcho-primitivism critiques domestication as destroying
17010-436: The silkworm and the western honey bee , have been domesticated for over 5,000 years, often for commercial use. The silkworm is raised for the silk threads wound around its pupal cocoon; the western honey bee, for honey , and, from the 20th century, for pollination of crops. Several other invertebrates have been domesticated, both terrestrial and aquatic, including some such as Drosophila melanogaster fruit flies and
17220-548: The trade winds which carried them across the Pacific to the Philippines where Magellan was killed. One surviving ship led by Juan Sebastián Elcano returned west across the Indian Ocean and the other went north in the hope of finding the westerlies and reaching Mexico. Unable to find the right winds, it was forced to return to the East Indies. The Magellan-Elcano expedition achieved the first circumnavigation of
17430-422: The 2006 book Extinction and Biogeography of Tropical Pacific Birds , American paleontologist David Steadman wrote, "no place on earth is as perplexing as the 25,000 islands that make Oceania." Steadman viewed Oceania as encompassing Melanesia, Micronesia and Polynesia (including Easter Island and Hawaii). He excluded from his definition the larger islands of New Guinea and New Zealand, and argued that Cocos Island,
17640-773: The 2013 book The Environments of the Poor in Southeast Asia, East Asia and the Pacific , Paul Bullen critiqued the definition of Oceania in Encyclopedia of Islands , and wrote that since Koppers included areas such as Vancouver Island, it is "not clear what the referents of 'Pacific Region', 'Oceania' or 'Pacific Islands' are." Bullen added that, "Asia, Europe and the Maritime Continent are not literal geographic continents. The ' Asia–Pacific region' would comprise two quasi-continents. 'The Pacific' would not refer to
17850-676: The Aleutian Islands, Japan's Izu Islands , the Kuril Islands, the Ryukyu Islands and most of the Solomon Islands, were also excluded from his definition. Unlike the United Nations, the World Factbook defines the still-uninhabited Clipperton Island as being a discrete political entity, and they categorize it as part of North America, presumably due to its relative proximity (situated 1,200 kilometres off Mexico on
18060-557: The Aleutian Islands, the Bonin Islands, the Japanese archipelago, the Juan Fernández Islands, the Kuril Islands, the Ryukyu Islands, Taiwan, California 's Channel Islands and Farallon Islands , Canada 's Vancouver Island and Queen Charlotte Islands (now known as Haida Gwaii), Chile's Chiloé Island , Ecuador's Galápagos Islands, Mexico's Guadalupe Island , Revillagigedo Islands , San Benito Islands and Tres Marías Islands , and Peru's Chincha Islands . Islands in marginal seas of
18270-555: The Americas began to cultivate peanuts , squash , maize , potatoes , cotton , and cassava . Rice was first domesticated in China some about 9,000 years ago. In Africa, crops such as sorghum were domesticated. Agriculture developed in some 13 centres around the world, domesticating different crops and animals. Three groups of insects, namely ambrosia beetles , leafcutter ants , and fungus-growing termites have independently domesticated species of fungi, on which they feed. In
18480-592: The Americas, Africa, and Asia (the Middle East, South Asia, the Far East, and New Guinea and Wallacea); in some thirteen of these regions people began to cultivate grasses and grains. Rice was first cultivated in East Asia. Sorghum was widely cultivated in sub-Saharan Africa, while peanuts, squash, cotton, maize , potatoes , and cassava were domesticated in the Americas. Continued domestication
18690-554: The Asian continent. They are now often referred to as Maritime Southeast Asia , with Indonesia, Malaysia, the Philippines and Singapore being founding members of the ASEAN regional organization for Southeast Asia in 1967 (Brunei and East Timor did not exist as independent nations at that point). Brown also categorized Japan and Taiwan as being in the same part of the world as the islands of Oceania, and excluded them from The Countries of
18900-510: The Asian mainland, as well as the Aleutians and the small island groups situated near the Americas. Thus, Oceania most commonly refers to the land areas of the South and Central Pacific. Kennedy defined Oceania as including Australasia, Melanesia, Micronesia, and Polynesia. The U.S. Government Publishing Office 's Area Handbook for Oceania from 1971 states that Australia and New Zealand are
19110-472: The Australian Plate and have been geographically associated with Southeast Asia, due to their proximity to western Indonesia. Both were uninhabited when discovered by Europeans during the 17th century. Approximately half of the population on these islands are European Australian mainlanders (with smaller numbers being European New Zealanders ), while the other half are immigrants from China or
19320-504: The Bonin Islands c. 2,000 years ago, but they were uninhabited at the time of European discovery in the 16th century. Depending on the definition, New Zealand could be part of Polynesia, or part of Australasia with Australia. New Zealand was originally settled by the Polynesian Māori , and has long maintained a political influence over the subregion. Through immigration and high Māori birth rates, New Zealand has attained
19530-582: The Bonin Islands, Hawaii, Clipperton Island and the Juan Fernández Islands, along with Easter Island — which was annexed by Chile in 1888. It is used in statistical reports, by the International Olympic Committee , and by many atlases. The UN categorizes Oceania, and by extension the Pacific area, as one of the major continental divisions of the world, along with Africa, Asia, Europe and the Americas. Their definition includes American Samoa , Australia and their external territories ,
19740-422: The Desventuradas Islands and the Juan Fernández Islands as being part of a region titled Insular Chile . They further include in this region Salas y Gómez, a small uninhabited island to the east of Easter Island. PLOS One describe Insular Chile as having "cultural and ecological connections to the broader insular Pacific." In her 1997 book Australia and Oceania , Australian historian Kate Darian-Smith defined
19950-726: The Galápagos Islands were not a member of the South Pacific Commission , like other islands in the South Pacific. The South Pacific Commission is a developmental organization formed in 1947 and is currently known as the Pacific Community; its members include Australia and other Pacific Islands Forum members. In a 1947 article on the formation of the South Pacific Commission for the Pacific Affairs journal, author Roy E. James stated
20160-488: The Galápagos Islands, and have a significant south central Pacific component to their marine fauna. According to scientific journal PLOS One , the Humboldt Current helps create a biogeographic barrier between the marine fauna of these islands and South America. Chile's government have occasionally considered them to be within Oceania along with Easter Island. Chile's government also categorize Easter Island,
20370-474: The Galápagos Islands, the Juan Fernández Islands, Costa Rica 's Cocos Island and Colombia 's Malpelo Island (all oceanic) as making up a Spanish language segment of Oceania. Cocos Island and Malpelo Island are the only landmasses located on the Cocos Plate , which is to the north of the Nazca Plate. The book observed that a native Polynesian language was still understood on Easter Island, unlike with
20580-446: The Galápagos Islands, the Revillagigedo Islands and other oceanic islands nearing the Americas were not part of Oceania, due to their biogeographical affinities with that area and lack of prehistoric indigenous populations. In his 2018 book Regionalism in South Pacific , Chinese author Yu Changsen wrote that some "stress a narrow vision of the Pacific as those Pacific Islands excluding Australia and even sometimes New Zealand", adding that
20790-578: The Hawaiian and Galápagos ." In 1876, French geographer Élisée Reclus labelled Australia's flora as "one of the most characteristic on the globe", adding that "the Hawaiian archipelago also constitutes a separate vegetation zone; of all tropical insular groups it possesses the relatively largest number of endemic plants. In the Galápagos group also more than half of the species are of local origin." Rand McNally & Company , an American publisher of maps and atlases, claimed in 1892 that, "Oceania comprises
21000-595: The Late Pleistocene. Domestication reduces genetic diversity of the domesticated population, especially of alleles of genes targeted by selection. One reason is a population bottleneck created by artificially selecting the most desirable individuals to breed from. Most of the domesticated strain is then born from just a few ancestors, creating a situation similar to the founder effect . Domesticated populations such as of dogs, rice, sunflowers, maize, and horses have an increased mutation load , as expected in
21210-565: The Malay Archipelago, not the modern country of Malaysia ) and Polynesia (which included both the Polynesian and Micronesian islands in her definition). Aside from mainland Australia, areas that she identified as of high importance were Borneo, Hawaii, Indonesia's Java and Sumatra , New Guinea, New Zealand, the Philippines, French Polynesia's Society Islands , Tasmania, and Tonga. American geographer Jesse Olney 's 1845 book A Practical System of Modern Geography stated that it "comprises
21420-697: The Marshall Islands during the 2nd millennium BC E, with inter-island navigation made possible using traditional stick charts . The Polynesian people are considered to be by linguistic, archaeological and human genetic ancestry a subset of the sea-migrating Austronesian people and tracing Polynesian languages places their prehistoric origins in the Malay Archipelago , and ultimately, in Taiwan . Between c. 3000 and 1000 BCE, speakers of Austronesian languages began spreading from Taiwan into Island Southeast Asia , as tribes whose natives were thought to have arrived through South China c. 8,000 years ago to
21630-538: The Melanesian, Micronesian, and Polynesian subdivisions, but not with the Indonesian or non-tropical subdivisions. The Pacific Islands Handbook (1945), by Robert William Robson, stated that, "Pacific Islands generally are regarded as Pacific islands lying within the tropics. There are a considerable number of Pacific Islands outside the tropics. Most of them have little economic or political importance." He noted
21840-627: The Northern Mariana Islands navigated to the islands and discovered it at some period between 4000 BCE to 2000 BCE from Southeast Asia . They became known as the Chamorros . Their language was named after them. The ancient Chamorro left a number of megalithic ruins, including Latte stone . The Refaluwasch or Carolinian people came to the Marianas in the 1800s from the Caroline Islands . Micronesian colonists gradually settled
22050-622: The Pacific Ocean and everything in it e.g., the Philippines." The Concise Oxford Dictionary of World Place Names (2017), by John Everett-Heath, states that Oceania is "a collective name for more than 10,000 islands in the Pacific Ocean" and that "it is generally accepted that Indonesia, Japan, the Philippines, Taiwan, and the islands north of Japan (the Kurils and Aleutians) are excluded." In his 1993 book A New Oceania: Rediscovering Our Sea of Islands , New Guinea-born Fijian scholar Epeli Hauʻofa wrote that, "Pacific Ocean islands from Japan, through
22260-508: The Pacific Plate). Clipperton is not politically associated with the Americas, as is the case with other oceanic islands nearing the Americas, having had almost no interaction with the continent throughout its history. From the early 20th century to 2007, the island was administratively part of French Polynesia, which itself was known as French Oceania up until 1957. In terms of marine fauna, Clipperton shares similarities with areas of
22470-478: The Pacific such as those of Japan or the Channel Islands off the southern California coast are not typically considered Oceania as the indigenous populations of these places do not share a common ancestry with Oceanic groups, except for a time far before humans sailed Pacific waters." It has been theorized that the indigenous Jōmon people of the Japanese archipelago are related to Austronesians, along with
22680-698: The Pacific were also covered in the book, including Alaska's Pribilof Islands and China's Hainan . Tyler additionally profiled the Anson Archipelago , which during the 19th century was a designation for a widely scattered group of purported islands in the Northwestern Pacific Ocean between Japan and Hawaii. The Anson archipelago included phantom islands such as Ganges Island and Los Jardines which were proven to not exist, as well as real islands such as Marcus Island and Wake Island. Tyler described Australia as "the leviathan of
22890-504: The Pacific which are much farther removed from the Americas. Scottish author Robert Hope Moncrieff considered Clipperton to be the easternmost point of Oceania in 1907, while Ian Todd also included it in his definition of Oceania in Island Realm: A Pacific Panorama . Other uninhabited Pacific Ocean landmasses have been explicitly associated with Oceania, including the highly remote Baker Island and Wake Island (now administered by
23100-463: The Philippines and Indonesia, which are adjacent to the Asian mainland, do not have oceanic cultures, and are therefore not part of Oceania." The Oxford Handbook of Prehistoric Oceania (2018) defined Oceania as only covering Austronesian-speaking islands in Melanesia, Micronesia and Polynesia, with this definition including New Guinea and New Zealand. Other Austronesian areas such as Indonesia and
23310-501: The Philippines were not included, due to their closer cultural proximity to mainland Asia. Australia was also not included, as it was settled several thousands of years before the arrival of Austronesian-speaking peoples in Melanesia, Micronesia and Polynesia. The book stated, "this definition of Oceania might seem too restrictive: Why not include Australia, for example, or even too broad, for what does Highland New Guinea have to do with Hawai'i?", further noting that, "a few other islands in
23520-558: The Revillagigedo Islands (both situated on the Pacific Plate) and the oceanic islands situated on the Cocos Plate and Nazca Plate. Todd defined the oceanic Bonin Islands as making up a Japanese language segment of Oceania, and excluded the main Japanese archipelago. Todd further included the Aleutian Islands in his definition of Oceania. The island chain borders both the Pacific Plate and the North American Plate , and
23730-619: The Ryukyu Islands. He added that, "besides the proceeding, the Pacific contains many other islands, of which the most important are Hainan and Formosa, on the coast of China, the Japan isles, the Kuriles, the Aleutian Islands (stretching from the New World to the Old), Vancouver Island, the Galápagos, Juan Fernández and Chiloé." Scottish academic John Merry Ross in 1879 considered Polynesia to cover
23940-415: The Solomon Islands, New Caledonia, and New Zealand and the oceanic islands of Polynesia, Micronesia, and Melanesia." He went on to write that his preferred definition of Oceania emphasis islands with oceanic geology, stating that oceanic islands are, "islands with no past connections to a continental landmass" and that, "these boundaries encompass the Hawaiian and Bonin Islands in the north and Easter Island in
24150-580: The Swedish botanist and zoologist Carl Linnaeus assigned the genus name Canis (which is the Latin word for "dog") to the domestic dog, the wolf , and the golden jackal in his book, Systema Naturae . He classified the domestic dog as Canis familiaris and, on the next page, classified the grey wolf as Canis lupus . Linnaeus considered the dog to be a separate species from the wolf because of its upturning tail ( cauda recurvata in Latin term), which
24360-504: The World: Volume 5 , which covered mainland Asia and Hong Kong. However, Brown did not explicitly associate Japan or Taiwan with the term Oceania. He divided Oceania into two subregions: Eastern Oceania, which included the islands of Melanesia, Micronesia and Polynesia, and Southwestern Oceania, which included Australia and New Zealand. The Galápagos Islands, the Juan Fernández Islands and the Revillagigedo Islands were identified as
24570-537: The [Malay] archipelago." In a 1972 article for the Music Educators Journal titled Musics of Oceania , author Raymond F. Kennedy wrote: many meanings have been given to the word Oceania. The most inclusive–but not always the most useful–embraces about 25,000 land areas between Asia and the Americas. A more popular and practical definition excludes Indonesia, East Malaysia (Borneo), the Philippines, Taiwan, Japan and other islands closely related to
24780-460: The ability to thrive on a starch -rich diet that would be inadequate for other canids . Dogs have been bred for desired behaviors, sensory capabilities, and physical attributes. Dog breeds vary widely in shape, size, and color. They have the same number of bones (with the exception of the tail), powerful jaws that house around 42 teeth, and well-developed senses of smell, hearing, and sight. Compared to humans, dogs have an inferior visual acuity ,
24990-677: The ancestor of domestic dogs. In 2018, a study identified 429 genes that differed between modern dogs and modern wolves. As the differences in these genes could also be found in ancient dog fossils, these were regarded as being the result of the initial domestication and not from recent breed formation. These genes are linked to neural crest and central nervous system development. These genes affect embryogenesis and can confer tameness, smaller jaws, floppy ears, and diminished craniofacial development, which distinguish domesticated dogs from wolves and are considered to reflect domestication syndrome. The study concluded that during early dog domestication,
25200-667: The area as covering Australia, New Zealand and the islands of the Melanesia, Micronesia and Polynesia. She excluded Hawaii from her definition, but not Easter Island. The International Union for Conservation of Nature stated in a 1986 report that they include Easter Island in their definition of Oceania "on the basis of its Polynesian and biogeographic affinities even though it is politically apart", further noting that other oceanic islands administered by Latin American countries had been included in definitions of Oceania. In 1987, The Journal of Australasian Cave Research described Oceania as being "the region from Irian Jaya (Western New Guinea,
25410-458: The beginning of the Holocene 11,700 years ago, a warmer climate and increasing human populations led to small-scale animal and plant domestication and an increased supply of food. The appearance of the domestic dog in the archaeological record, at least 15,000 years ago, was followed by domestication of livestock and of crops such as wheat and barley , the invention of agriculture , and
25620-438: The book adds that Hawaii is still within Oceania, despite being politically integrated into the U.S., and that the Pacific Ocean "gives unity to the whole" since "all these varied lands emerge from or border upon the Pacific." The 1876 book The Countries of the World , by British scientist and explorer Robert Brown , labelled the Malay Archipelago as Northwestern Oceania, but Brown still noted that these islands belonged more to
25830-605: The book. Hainan, which neighbours Taiwan, also has Austronesian ethnolinguistic origins, although it was not included in the book. The book defined Oceania's major subregions as being Australia, Indonesia (which included all areas associated with the Malay Archipelago), Melanesia, Micronesia, and Polynesia. In 2010, Australian historian Bronwen Douglas claimed in The Journal of Pacific History that "a strong case could be made for extending Oceania to at least Taiwan,
26040-455: The case of the termites, the relationship is a fully obligate symbiosis on both sides. Domestication (not to be confused with the taming of an individual animal ), is from the Latin domesticus , 'belonging to the house'. The term remained loosely defined until the 21st century, when the American archaeologist Melinda A. Zeder defined it as a long-term relationship in which humans take over control and care of another organism to gain
26250-402: The cause and vice versa. The typical lifespan of dogs varies widely among breeds, but the median longevity (the age at which half the dogs in a population have died and half are still alive) is approximately 12.7 years. Obesity correlates negatively with longevity with one study finding obese dogs to have a life expectancy approximately a year and a half less than dogs with a healthy weight. In
26460-538: The cold Aleutian Islands and the islands of Japan. Disagreement also exists over whether or not Indonesia, the Philippines and Taiwan should be included in Oceania." The Japanese Archipelago, the Malay Archipelago and Taiwan and other islands near China are often deemed as a geological extension of Asia, since they do not have oceanic geology , instead being detached fragments of the Eurasian continent that were once physiologically connected. Certain Japanese islands off
26670-834: The companion animal most frequently reported for exposure to toxins . Most poisonings are accidental and over 80% of reports of exposure to the ASPCA animal poisoning hotline are due to oral exposure. The most common substances people report exposure to are: pharmaceuticals, toxic foods, and rodenticides . Data from the Pet Poison Helpline shows that human drugs are the most frequent cause of toxicosis death. The most common household products ingested are cleaning products. Most food related poisonings involved theobromine poisoning (chocolate). Other common food poisonings include xylitol , Vitis (grapes, raisins, etc.) and Allium (garlic, oninions, etc.). Pyrethrin insecticides were
26880-474: The complexities of the Pacific area." In the 19th century, many geographers divided Oceania into mostly racially based subdivisions: Australasia , Malesia (encompassing the Malay Archipelago ), Melanesia , Micronesia and Polynesia . The 2011 book Maritime Adaptations of the Pacific , by Richard W. Casteel and Jean-Claude Passeron, states that, "for the purpose of anthropology , Oceania has long been
27090-518: The continental group, which included Australia, the Japanese archipelago, the Malay Archipelago and Taiwan, and the oceanic group, which included New Zealand and the islands of Melanesia, Micronesia and Polynesia. Charles Marion Tyler's 1885 book The Island World of the Pacific Ocean considered Oceania to ethnographically encompass Australia, New Zealand, the Malay Archipelago, and the islands of Melanesia, Micronesia, and Polynesia. However, Tyler included other Pacific islands in his book as well, such as
27300-534: The dingo. This classification was informed by a 1999 mitochondrial DNA study. The classification of dingoes is disputed and a political issue in Australia. Classifying dingoes as wild dogs simplifies reducing or controlling dingo populations that threaten livestock. Treating dingoes as a separate species allows conservation programs to protect the dingo population. Dingo classification affects wildlife management policies, legislation, and societal attitudes. In 2019,
27510-483: The dogs could not swim; the other 63.5% were able to swim without a trainer in a swimming pool . A study of 55 dogs found a correlation between swimming and 'improvement' of the hip osteoarthritis joint . The female dog may produce colostrum , a type of milk high in nutrients and antibodies, 1–7 days before giving birth. Milk production lasts for around three months, and increases with litter size. The dog can sometimes vomit and refuse food during child contractions . In
27720-509: The domestication of animals involved violence against animals and damage to the environment. This, in turn, he argues, corrupted human ethics and paved the way for "conquest, extermination, displacement, repression, coerced and enslaved servitude, gender subordination and sexual exploitation, and hunger." Domesticated ecosystems provide food, reduce predator and natural dangers, and promote commerce, but their creation has resulted in habitat alteration or loss, and multiple extinctions commencing in
27930-515: The domestication syndrome; it is predicted that domestic animals are less resistant to parasites than their wild relatives. Domesticated birds principally mean poultry , raised for meat and eggs: some Galliformes ( chicken , turkey , guineafowl ) and Anseriformes (waterfowl: ducks , geese , and swans ). Also widely domesticated are cagebirds such as songbirds and parrots ; these are kept both for pleasure and for use in research. The domestic pigeon has been used both for food and as
28140-645: The earth — Europe , Asia, Africa , North America, South America and Oceania." American author Samuel Griswold Goodrich wrote in his 1854 book History of All Nations that, "geographers have agreed to consider the island world of the Pacific Ocean as a third continent, under the name Oceania." In this book, the other two continents were categorized as being the New World (the Americas) and the Old World ( Afro-Eurasia ). In his 1879 book Australasia , British naturalist Alfred Russel Wallace commented that, "Oceania
28350-466: The easternmost areas of Oceania in the book. Brown wrote, "they lie nearest the American continent of all oceanic islands, and though rarely associated with Polynesia, and never appearing to have been inhabited by any aboriginal races, are, in many ways, remarkable and interesting." Brown went on to add, "the small islands lying off the continent, like the Queen Charlotte's in the North Pacific,
28560-478: The edges of western Micronesia and on into Melanesia. In the archaeological record there are well-defined traces of this expansion which allow the path it took to be followed and dated with some certainty. It is thought that by roughly 1400 BCE, " Lapita Peoples", so-named after their pottery tradition, appeared in the Bismarck Archipelago of north-west Melanesia. Easter Islanders claimed that
28770-591: The embryo attaches to the uterus , and after seven to eight more days, a heartbeat is detectable. Dogs bear their litters roughly 58 to 68 days after fertilization , with an average of 63 days, although the length of gestation can vary. An average litter consists of about six puppies . Neutering is the sterilization of animals via gonadectomy , which is an orchidectomy (castration) in dogs and ovariohysterectomy (spay) in bitches. Neutering reduces problems caused by hypersexuality , especially in male dogs. Spayed females are less likely to develop cancers affecting
28980-543: The end of global surveys as areas largely marginal to the main events of world history". The new terms Near Oceania and Remote Oceania were proposed in 1973 by anthropologists Roger Green and Andrew Pawley . By their definition, Near Oceania consists of New Guinea, the Bismarck Archipelago and the Solomon Islands, with the exception of the Santa Cruz Islands . They are designed to dispel
29190-562: The entire 25,000 islands of the Pacific Ocean. In this book, he included the Aleutian Islands, the Galápagos Islands, the Japanese archipelago, the Kuril Islands and continental islands off the coast of the Americas such as the Channel Islands, the Farallon Islands and Vancouver Island; all of these islands lie in or close to the Pacific Ring of Fire , as is the case with New Guinea and New Zealand, which were also included. In
29400-494: The entire South and Central Pacific area, not just islands ethnographically within Polynesia. He wrote in The Globe Encyclopedia of Universal Information that, "literally interpreted, the name would include all the groups from Sumatra to the Galápagos, together with Australia." Ross further wrote, "and to this vast region the term Oceania has been applied. It is more usual at the present time, however, to exclude
29610-492: The entire order of carnivores . These breeds possess distinct traits related to morphology, which include body size, skull shape, tail phenotype, fur type, and colour. As such, humans have long used dogs for their desirable traits to complete or fulfill a certain work or role. Their behavioural traits include guarding, herding, hunting, retrieving, and scent detection. Their personality traits include hypersocial behavior, boldness, and aggression. Present-day dogs are dispersed around
29820-598: The expense of problem-solving ability . In a 2023 study of 58 dogs, some dogs classified as attention deficit hyperactivity disorder -like showed lower serotonin and dopamine concentrations. A similar study claims that hyperactivity is more common in male and young dogs. A dog can become aggressive because of trauma or abuse, fear or anxiety, territorial protection, or protecting an item it considers valuable. Acute stress reactions from post-traumatic stress disorder (PTSD) seen in dogs can evolve into chronic stress . Police dogs with PTSD can often refuse to work. Dogs have
30030-611: The eye is attached to a nerve fiber , and is the most sensitive to photons . Additionally, a study found that dogs' visual acuity was up to eight times less effective than a human, and their ability to discriminate levels of brightness was about two times worse than a human. While the human brain is dominated by a large visual cortex , the dog brain is dominated by a large olfactory cortex . Dogs have roughly forty times more smell-sensitive receptors than humans, ranging from about 125 million to nearly 300 million in some dog breeds, such as bloodhounds . This sense of smell
30240-526: The family Canidae . They are classified as a subspecies of Canis lupus , along with wolves and dingoes . Dogs were domesticated from wolves over 14,000 years ago by hunter-gatherers , before the development of agriculture. The dingo and the related New Guinea singing dog resulted from the geographic isolation and feralization of dogs in Oceania over 8,000 years ago. Dogs, wolves, and dingoes have sometimes been classified as separate species. In 1758,
30450-447: The forelimbs are attached by bone and ligament, while the dewclaws on the hind legs are attached only by skin. Most dogs aren't born with dewclaws in their hind legs, and some are without them in their forelimbs. Dogs' dewclaws consist of the proximal phalanges and distal phalanges . Some publications theorize that dewclaws in wolves, who usually do not have dewclaws, were a sign of hybridization with dogs. A dog's tail
30660-447: The freshwater cnidarian Hydra for research into genetics and physiology. Few have a long history of domestication. Most are used for food or other products such as shellac and cochineal . The phyla involved are Cnidaria , Platyhelminthes (for biological pest control ), Annelida , Mollusca , Arthropoda (marine crustaceans as well as insects and spiders), and Echinodermata . While many marine mollusks are used for food, only
30870-810: The genome and the epigenome , enabling a rapid evolutionary response to artificial selection. Polyploidy increases the number of chromosomes, bringing new combinations of genes and alleles, which in turn enable further changes such as by chromosomal crossover . The microbiome , the collection of microorganisms inhabiting the surface and internal tissue of plants, is affected by domestication. This includes changes in microbial species composition and diversity. Plant lineage, including speciation , domestication, and breeding , have shaped plant endophytes ( phylosymbiosis ) in similar patterns as plant genes. Several species of fungi have been domesticated for use directly as food, or in fermentation to produce foods and drugs. The cultivated mushroom Agaricus bisporus
31080-416: The great ocean itself." Conrad Malte-Brun in 1824 defined Oceania as covering Australia, New Zealand, the islands of Polynesia (which then included all the Pacific islands) and the Malay Archipelago. American lexicographer Joseph Emerson Worcester wrote in 1840 that Oceania is "a term applied to a vast number of islands which are widely dispersed in the Pacific Ocean [...] they are considered as forming
31290-473: The high Arctic, or eastern Asia. In 2021, a literature review of the current evidence infers that the dog was domesticated in Siberia 23,000 years ago by ancient North Siberians , then later dispersed eastward into the Americas and westward across Eurasia, with dogs likely accompanying the first humans to inhabit the Americas. Some studies have suggested that the extinct Japanese wolf is closely related to
31500-572: The homeland of the Austronesian language family whose speakers colonized significant parts of the region about 6,000 years ago." For political reasons, Taiwan was a member of the Oceania Football Confederation during the 1970s and 1980s, rather than the Asian Football Confederation . Ian Todd's 1974 book Island Realm: A Pacific Panorama also defines oceanic Latin American islands as making up
31710-532: The homogenizing effect of gene flow from wild boars into pigs, and created domestication islands in the genome. The same process may apply to other domesticated animals. The 2023 parasite-mediated domestication hypothesis suggests that endoparasites such as helminths and protozoa could have mediated the domestication of mammals. Domestication involves taming, which has an endocrine component; and parasites can modify endocrine activity and microRNAs . Genes for resistance to parasites might be linked to those for
31920-554: The indigenous inhabitants of the Ryukyu Islands. Some also theorize that Indigenous Australians are related to the Ainu people , who are the original inhabitants of Japan's Hokkaido , the Kuril Islands and the southern part of Sakhalin. In their 2019 book Women and Violence: Global Lives in Focus , Kathleen Nadeau and Sangita Rayamajhi wrote: the Philippines, Malaysia, Brunei, and most of Indonesia are not usually considered to be part of
32130-426: The initial episode of domestication of that animal or plant, whereas improvement traits are present only in a proportion of domesticates, though they may be fixed in individual breeds or regional populations . Certain animal species, and certain individuals within those species, make better candidates for domestication because of their behavioral characteristics: The beginnings of mammal domestication involved
32340-705: The initial selection was for behavior. This trait is influenced by those genes which act in the neural crest, which led to the phenotypes observed in modern dogs. There are around 450 official dog breeds , the most of any mammal. Dogs began diversifying in the Victorian era , when humans took control of their natural selection. Most breeds were derived from small numbers of founders within the last 200 years. Since then, dogs have undergone rapid phenotypic change and have been subjected to artificial selection by humans. The skull, body, and limb proportions between breeds display more phenotypic diversity than can be found within
32550-471: The island groups of the world". In his 1857 book A Treatise on Physical Geography , Francis B. Fogg commented that "the Pacific and its dependencies may be said to contain that portion of the globe termed Oceanica or 'the Maritime World', which is divided into Australasia, Malesia and Polynesia." Fogg defined Polynesia as covering the combined islands of Melanesia, Micronesia and Polynesia, as well as
32760-492: The islands in the [Malay] archipelago, to which certain writers have given the name of Malesia ." It added there was controversy over the exact limits of Oceania, saying that, "scarcely any two geographers appear to be quite agreed upon the subject". British physician and ethnologist James Cowles Prichard claimed in 1847 that the Aleutian Islands and the Kuril Islands form "the northern boundary of this fifth region of
32970-469: The islands of Melanesia are more commonly grouped together as part of the Australasian biogeographical realm . Papua New Guinea is geographically the closest country to Australia, and is often geologically associated with Australia as it was once physiologically connected. Australia's Indian Ocean external territories of Christmas Island and Cocos (Keeling) Islands are situated within the bounds of
33180-399: The islands of the Malay Archipelago, while the non-tropical islands were categorized as being North Pacific islands such as Alaska's Kodiak archipelago , the Aleutian Islands, Japan, the Kuril Islands and Sakhalin. Japan's Bonin and Ryukyu Islands are also considered to be subtropical islands , with the main Japanese archipelago being non-tropical. The journal associated the term Oceania with
33390-426: The large island of Australia and the innumerable islands of the Pacific Ocean" and also that the islands of the Malay Archipelago "should be grouped in with Asia." British linguist Robert Needham Cust argued in 1887 that the Malay Archipelago should be excluded since it had participated in Asian civilization. Cust considered Oceania's four subregions to be Australasia, Melanesia, Micronesia and Polynesia. New Zealand
33600-470: The largest population of Polynesians in the world, while Australia has the third largest Polynesian population (consisting entirely of immigrants). Modern-day Indigenous Australians are loosely related to Melanesians, and Australia maintains political influence over Melanesia, which is mostly located on the same tectonic plate. Despite this, Australia is rarely seen as a part of the subregion. As with Australia and New Zealand, Melanesia's New Caledonia has
33810-468: The late 20th century, some scholars theorized a long period of interaction, which resulted in many complex changes in genetics, languages, and culture among the peoples. Micronesia began to be settled several millennia ago, although there are competing theories about the origin and arrival of the first settlers. There are numerous difficulties with conducting archaeological excavations in the islands, due to their size, settlement patterns and storm damage. As
34020-445: The later stages of the dog's pregnancy, nesting behaviour may occur. Puppies are born with a protective fetal membrane that the mother usually removes shortly after birth. Dogs can have the maternal instincts to start grooming their puppies, consume their puppies' feces, and protect their puppies, likely due to their hormonal state. While male-parent dogs can show more disinterested behaviour toward their own puppies, most can play with
34230-580: The leaf material to the fungi that they tend. Some of these fungi are not fully domesticated: the fungi farmed by Mycocepurus smithii constantly produce spores that are not useful to the ants, which eat fungal hyphae instead. The process of domestication by Atta ants, on the other hand, is complete; it took 30 million years. Some 330 fungus-growing termite species of the subfamily Macrotermitinae cultivate Termitomyces fungi to eat; domestication occurred exactly once, 25–40 mya . The fungi, described by Roger Heim in 1942, grow on 'combs' formed from
34440-403: The least populated of the five parts of the world is diminished in order to increase the number of inhabitants of the most densely populated continent. Regarding Australia and the Pacific, Chambers's New Handy Volume American Encyclopædia observed in 1885 that, "the whole region has sometimes been called Oceania, and sometimes Australasia—generally, however, in modern times, to the exclusion of
34650-526: The main archipelago are not geologically associated with Asia. The book The World and Its Peoples: Australia, New Zealand, Oceania (1966) asserts that, "Japan, Taiwan, the Aleutian Islands, Indonesia, the Philippines and Malaysia [and] the Pacific archipelagos bordering upon the Far East Asian mainland are excluded from Oceania", and that "all the islands lying between Australia and the Americas, including Australia, are part of Oceania." Furthermore,
34860-531: The main islands in the Solomon Islands archipelago , including Makira and possibly the smaller islands farther to the east. Particularly along the north coast of New Guinea and in the islands north and east of New Guinea, the Austronesian people , who had migrated into the area somewhat more than 3,000 years ago, came into contact with these pre-existing populations of Papuan-speaking peoples. In
35070-546: The major continental divisions of the world, but the name "Australia and Oceania" is used. Their definition does not include all of Australia's external territories, but is otherwise the same as the UN's definition, and is also used for statistical purposes. The Pacific Islands Forum expanded during the early 2010s, and areas that were already included in the UN definition of Oceania, such as French Polynesia, gained membership. French writer Gustave d'Eichthal remarked in 1844 that, "the boundaries of Oceania are in reality those of
35280-588: The many islands between mainland Asia and the Americas . The island nation of Australia is the only piece of land in the area which is large enough to typically be considered a continent. The culture of the people who lived on these islands was often distinct from that of Asia and pre-Columbian America. Before Europeans arrived in the area, the sea shielded Australia and south central Pacific islands from cultural influences that spread through large continental landmasses and adjacent islands. The islands of
35490-467: The most common cause of pesticide poisoning. Metaldehyde a common pesticide for snails and slugs typically causes severe outcomes when ingested by dogs. Neoplasia is the most common cause of death for dogs. Other common causes of death are heart and renal failure . Their pathology is similar to that of humans, as is their response to treatment and their outcomes. Genes found in humans to be responsible for disorders are investigated in dogs as being
35700-614: The nearby Malay Archipelago. Australia's Indian Ocean external territory Heard Island and McDonald Islands lie on the Antarctic Plate and are also thought of as being in Antarctica or no region at all, due to their extreme geographical isolation. The World Factbook define Heard Island and McDonald Islands as part of Antarctica, while placing Christmas Island and Cocos (Keeling) Islands as the westernmost extent of Oceania. Norfolk Island , an external territory of Australia,
35910-495: The nose, ears, and jaw. Whiskers likely also facilitate the movement of food towards the mouth. The coats of domestic dogs are of two varieties: "double" being common in dogs (as well as wolves) originating from colder climates, made up of a coarse guard hair and a soft down hair , or "single", with the topcoat only. Breeds may have an occasional "blaze", stripe, or "star" of white fur on their chest or underside. Premature graying can occur in dogs as early as one year of age; this
36120-623: The numerous isles of the Pacific, lying south east of Asia." Olney divided up Oceania into three groups; Australasia (which included Australia, New Guinea, and New Zealand), Malesia and Polynesia (which included the combined islands of Melanesia, Micronesia, and Polynesia in his definition). Publication Missionary Review of the World claimed in 1895 that Oceania was divided up into five groups; Australasia, Malesia, Melanesia, Micronesia, and Polynesia. It did not consider Hawaii to be part of Polynesia, due to its geographic isolation, commenting that Oceania also included, "isolated groups and islands, such as
36330-656: The occurrence of artificial selection and the subsequent divergence of behavior and anatomical features. These genes have been shown to affect the catecholamine synthesis pathway, with the majority of the genes affecting the fight-or-flight response (i.e., selection for tameness ) and emotional processing. Compared to their wolf counterparts, dogs tend to be less timid and less aggressive, though some of these genes have been associated with aggression in certain dog breeds. Traits of high sociability and lack of fear in dogs may include genetic modifications related to Williams-Beuren syndrome in humans, which cause hypersociability at
36540-572: The organization's scope encompassed all non-self governing islands below the equator to the east of Papua New Guinea (which itself was included in the scope and then known as Dutch New Guinea ). Easter Island and the Galápagos Islands were defined by James as falling within the organization's geographical parameters. The 2007 book Asia in the Pacific Islands: Replacing the West , by New Zealand Pacific scholar Ron Crocombe , defined
36750-426: The other islands, which were uninhabited when discovered by Europeans and mostly being used as prisons for convicts. Additionally, the book includes Taiwan and the entire Malay Archipelago as part of Oceania. While not oceanic in nature, Taiwan and Malay Archipelago countries like Indonesia and the Philippines share Austronesian ethnolinguistic origins with Melanesia, Micronesia and Polynesia, hence their inclusion in
36960-400: The outdated categories of Melanesia , Micronesia , and Polynesia ; many scholars now replace those categories with Green's terms since the early 1990s, but the old categories are still used in science, popular culture and general usage. Islands at the geographic extremes of Oceania are generally considered to be the Bonin Islands , a politically integral part of Japan; Hawaii , a state of
37170-572: The political significance of the Aleutian Islands, which were invaded by the Japanese military in World War II, and categorized New Zealand's Antipodes Islands , Auckland Islands , Bounty Islands , Campbell Islands , Chatham Island and Kermadec Islands as being non-tropical islands of the South Pacific, along with Australia's Lord Howe Island and Norfolk Island. The Kermadec Islands, Lord Howe Island and Norfolk Island are also considered to be subtropical islands. Other non-tropical areas below
37380-403: The principal large sovereignties of the area. It further states: In its broadest definition Oceania embraces all islands and island groups of the Pacific Ocean that lie between Asia and the two American continents. In popular usage, however, the designation has a more restricted application. The islands of the North Pacific, such as the Aleutians and the Kuriles, usually are excluded. In addition,
37590-531: The region of Oceania as it is understood today. These regions are usually considered to be part of Maritime Southeast Asia. Although these regions, as well as the large East Asian islands of Taiwan, Hainan and the Japanese archipelago, have varying degrees of cultural connections. In Reptiles and Amphibians of the Pacific Islands: A Comprehensive Guide (2013), George R. Zug claimed that "a standard definition of Oceania includes Australia, Papua New Guinea,
37800-514: The relationship between them intensified, and humans' role in their survival and reproduction gradually led to formalized animal husbandry . Although the directed pathway for draft and riding animals proceeded from capture to taming, the other two pathways are not as goal-oriented, and archaeological records suggest that they took place over much longer time frames. Unlike other domestic species selected primarily for production-related traits, dogs were initially selected for their behaviors. The dog
38010-403: The right side". Dogs can injure themselves by wagging their tails forcefully; this condition is called kennel tail , happy tail , bleeding tail , or splitting tail . In some hunting dogs , the tail is traditionally docked to avoid injuries. Some dogs can be born without tails because of a DNA variant in the T gene , which can also result in a congenitally short (bobtail) tail. Tail docking
38220-420: The same amount of bones (with the exception of the tail), although there is significant skeletal variation between dogs of different types. The dog's skeleton is well adapted for running; the vertebrae on the neck and back have extensions for back muscles, consisting of epaxial muscles and hypaxial muscles , to connect to; the long ribs provide room for the heart and lungs ; and the shoulders are unattached to
38430-641: The same biogeographical realm as the geographically adjacent Micronesia, and are often grouped in with the subregion because of this. Indigenous Australians are the original inhabitants of the Australian continent and nearby islands who migrated from Africa to Asia c. 70,000 years ago and arrived in Australia c. 50,000 years ago. They are believed to be among the earliest human migrations out of Africa . Although they likely migrated to Australia through Southeast Asia they are not demonstrably related to any known Asian or Polynesian population. There
38640-474: The series of sovereign island nations fringing Asia (Japan, Taiwan, the Philippines, East Malaysia, the Republic of Indonesia) are not ordinarily considered to be part of the area. In 1948, American military journal Armed Forces Talk broke the islands of the Pacific up into five major subdivisions; Indonesia, Melanesia, Micronesia, Polynesia and the non-tropical Islands. The Indonesia subdivision consisted of
38850-481: The shorter "Océanie", which derives from the Latin word oceanus , and this from the Greek word ὠκεανός ( ōkeanós ), "ocean". The term Oceania is used because, unlike the other continental groupings, it is the ocean that links the parts of the region together. John Eperjesi's 2005 book The Imperialist Imaginary says that it has "been used by Western cartographers since the mid-19th century to give order to
39060-571: The skeleton, allowing for flexibility. Compared to the dog's wolf-like ancestors, selective breeding since domestication has seen the dog's skeleton increase in size for larger types such as mastiffs and miniaturised for smaller types such as terriers ; dwarfism has been selectively bred for some types where short legs are preferred, such as dachshunds and corgis . Most dogs naturally have 26 vertebrae in their tails, but some with naturally short tails have as few as three. The dog's skull has identical components regardless of breed type, but there
39270-459: The small number of traits that made domestic species different from their wild ancestors. He was also the first to recognize the difference between conscious selective breeding in which humans directly select for desirable traits and unconscious selection, in which traits evolve as a by-product of natural selection or from selection on other traits. There is a difference between domestic and wild populations; some of these differences constitute
39480-510: The social and political landscape of Oceania. The Pacific theatre saw major action during the First and Second World Wars . The rock art of Aboriginal Australians is the longest continuously practiced artistic tradition in the world. Most Oceanian countries are parliamentary democracies , with tourism serving as a large source of income for the Pacific island nations . Definitions of Oceania vary. The broadest definition encompasses
39690-495: The south, and the Palau Islands in the west to the Galápagos Islands in the east." Australia, New Guinea, New Zealand and New Caledonia (which is geologically associated with New Zealand) were all excluded, as these areas are descendants of the ancient Pangaea supercontinent, along with landmasses such as the Americas and Afro-Eurasia . Volcanic islands which are geologically associated with continental landmasses, such as
39900-451: The supposed primitive state of harmony with nature in hunter-gatherer societies, and replacing it, possibly violently or by enslavement, with a social hierarchy as property and power emerged. The dialectal naturalist Murray Bookchin has argued that domestication of animals, in turn, meant the domestication of humanity, both parties being unavoidably altered by their relationship with each other. The sociologist David Nibert asserts that
40110-460: The surface area of this wide definition was greater than that of Asia and Europe combined, the land area was only a little greater than that of Europe. American geographer Sophia S. Cornell claimed that the Aleutian Islands were not part of Oceania in 1857. She stated that Oceania was divided up into three groups; Australasia (which included Australia, New Zealand, and the Melanesian islands), Malesia (which included all present-day countries within
40320-642: The tail's position and movement. Dogs can have a violet gland (or supracaudal gland) characterized by sebaceous glands on the dorsal surface of their tails; in some breeds, it may be vestigial or absent. The enlargement of the violet gland in the tail, which can create a bald spot from hair loss , can be caused by Cushing's disease or an excess of sebum from androgens in the sebaceous glands. A study suggests that dogs show asymmetric tail-wagging responses to different emotive stimuli. "Stimuli that could be expected to elicit approach tendencies seem to be associated with [a] higher amplitude of tail-wagging movements to
40530-554: The term "Pacific Islands" as being islands in the South Pacific Commission, and stated that such a definition "does not include Galápagos and other [oceanic] islands off the Pacific coast of the Americas; these were uninhabited when Europeans arrived, then integrated with a South American country and have almost no contact with other Pacific Islands." He adds, "Easter Island still participates in some Pacific Island affairs because its people are Polynesian." Thomas Sebeok 's two volume 1971 book Linguistics in Oceania defines Easter Island,
40740-577: The term Oceania "promotes a broader concept that has room for Australia and New Zealand." American marine geologist Anthony A. P. Koppers wrote in the 2009 book Encyclopedia of Islands that, "as a whole, the islands of the Pacific Region are referred to as Oceania, the tenth continent on earth. Inherent to their remoteness and because of the wide variety of island types, the Pacific Islands have developed unique social, biological and geological characteristics." Koppers considered Oceania to encompass
40950-503: The termites' excreta, dominated by tough woody fragments. The termites and the fungi are both obligate symbionts in the relationship. Oceania Oceania ( UK : / ˌ oʊ s i ˈ ɑː n i ə , ˌ oʊ ʃ i -, - ˈ eɪ n -/ OH -s(h)ee- AH -nee-ə, - AY - , US : / ˌ oʊ ʃ i ˈ æ n i ə , - ˈ ɑː n -/ OH -shee- A(H)N -ee-ə ) is a geographical region including Australasia , Melanesia , Micronesia , and Polynesia . Outside of
41160-462: The transition of humans from foraging to farming in different places and times across the planet. For instance, small-scale trial cultivation of cereals began some 28,000 years ago at the Ohalo II site in Israel. In the Fertile Crescent 11,000–10,000 years ago, zooarchaeology indicates that goats, pigs, sheep, and taurine cattle were the first livestock to be domesticated. Two thousand years later, humped zebu cattle were domesticated in what
41370-408: The wild. The first animal to be domesticated by humans was the dog , as a commensal , at least 15,000 years ago. Other animals, including goats , sheep , and cows , were domesticated around 11,000 years ago. Among birds, the chicken was first domesticated in East Asia, seemingly for cockfighting, some 7,000 years ago. The horse came under domestication around 5,500 years ago in central Asia as
41580-618: The world . The dog is the most popular pet in the United States, present in 34–40% of households. In developed countries, around 20% of dogs are kept as pets, while 75% of the population in developing countries largely consists of feral and community dogs. Gray wolf (domestic dog) [REDACTED] Coyote [REDACTED] African wolf [REDACTED] Ethiopian wolf [REDACTED] Golden jackal [REDACTED] Dhole [REDACTED] African wild dog [REDACTED] Side-striped jackal [REDACTED] Black-backed jackal [REDACTED] Dogs are domesticated members of
41790-408: The world, and with the coasts of Asia and America completing its literal termination." However, he wrote that these islands "are not usually reckoned as belonging to it, because they are known to be inhabited by races of people who came immediately from the adjacent continents and are unconnected with those tribes of the human race who peopled the remote islands of this great ocean." He added that Hawaii
42000-476: The world. An example of this dispersal is the numerous modern breeds of European lineage during the Victorian era. Dogs are extremely variable in size, ranging from one of the largest breeds, the Great Dane , at 50 to 79 kg (110 to 174 lb) and 71 to 81 cm (28 to 32 in), to one of the smallest, the Chihuahua , at 0.5 to 3 kg (1.1 to 6.6 lb) and 13 to 20 cm (5.1 to 7.9 in). All healthy dogs, regardless of their size and type, have
42210-406: The young pups as they would with other dogs or humans. A female dog may abandon or attack her puppies or her male partner dog if she is stressed or in pain. Domesticated Domestication is a multi-generational mutualistic relationship in which an animal species, such as humans or leafcutter ants , takes over control and care of another species, such as sheep or fungi, to obtain from them
42420-416: Was achieved when this landmass formed part of the Sahul continent , connected to the island of New Guinea via a land bridge. The Torres Strait Islanders are indigenous to the Torres Strait Islands, which are at the northernmost tip of Queensland near Papua New Guinea . The earliest definite human remains found in Australia are that of Mungo Man , which have been dated at c. 40,000 years old. It
42630-432: Was categorized by him as being in Polynesia; and the only country in his definition of Australasia was Australia. His definition of Polynesia included both Easter Island and Hawaii, which had not yet been annexed by either Chile or the United States. The Journal of the Royal Statistical Society stated in 1892 that Australia was a large island within Oceania rather than a small continent. It additionally commented: it
42840-502: Was defined as Australia and an ensemble of various Pacific Islands, "particularly those in the central and south Pacific [but] never those in the extreme north, for example the Aleutian chain." In the Pacific Ocean Handbook (1945), author Eliot Grinnell Mears claimed, "it is customary to exclude the Aleutians of the North Pacific, the American coastal islands and the Netherlands East Indies ", and that he included Australia and New Zealand in Oceania for "scientific reasons; Australia's fauna
43050-434: Was domesticated long before other animals, becoming established across Eurasia before the end of the Late Pleistocene era, well before agriculture . The archaeological and genetic data suggest that long-term bidirectional gene flow between wild and domestic stocks – such as in donkeys , horses , New and Old World camelids, goats, sheep, and pigs – was common. Human selection for domestic traits likely counteracted
43260-532: Was gradual and geographically diffuse – happening in many small steps and spread over a wide area – on the evidence of both archaeology and genetics. It was a process of intermittent trial and error and often resulted in diverging traits and characteristics. Whereas domestication of animals impacted most on the genes that controlled behavior, that of plants impacted most on the genes that controlled morphology (seed size, plant architecture, dispersal mechanisms) and physiology (timing of germination or ripening), as in
43470-427: Was inhabited in prehistoric times by either Melanesians or Polynesians, and is geographically adjacent to the islands of Melanesia. The current inhabitants are mostly European Australians, and the UN categorize it as being in the Australasia subregion. The 1982 edition of the South Pacific Handbook , by David Stanley, groups Australia, New Zealand, Norfolk Island, and Hawaiʻi together under an "Anglonesia" category. This
43680-606: Was not a local wolf. The dog was dated to 14,223 years ago and was found buried along with a man and a woman, all three having been sprayed with red hematite powder and buried under large, thick basalt blocks. The dog had died of canine distemper . This timing indicates that the dog was the first species to be domesticated in the time of hunter-gatherers , which predates agriculture. Earlier remains dating back to 30,000 years ago have been described as Paleolithic dogs , but their status as dogs or wolves remains debated because considerable morphological diversity existed among wolves during
43890-472: Was the most northerly area to be inhabited by races associated with Oceania. The 1926 book Modern World History, 1776–1926 , by Alexander Clarence Flick, considered Oceania to include all islands in the Pacific, and associated the term with the Malay Archipelago, the islands of Melanesia, Micronesia, and Polynesia, the Aleutian Islands, Japan's Ryukyu Islands , Taiwan and the Kuril Islands. He further included in his definition Sakhalin , an island which
44100-486: Was triggered by the climatic and environmental changes that occurred after the peak of the Last Glacial Maximum and which continue to this present day. These changes made obtaining food by hunting and gathering difficult. The first animal to be domesticated was the dog at least 15,000 years ago. The Younger Dryas 12,900 years ago was a period of intense cold and aridity that put pressure on humans to intensify their foraging strategies but did not favour agriculture. By
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