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66-543: Various Algonquian bands, often included in the Wappinger tribe, originally inhabited the Naugatuck River Valley. In fact, the name "Naugatuck" is derived from an Algonquian term meaning "lone tree by the fishing place". One early 19th century author explained that this name originally referred to a specific tree along the river in the area of modern-day Beacon Falls , but came to be applied broadly to

132-416: A game fish , even becoming one of the world's worst invasive species outside of its native range . Brown trout are highly adaptable and have evolved numerous ecotypes / subspecies . These include three main ecotypes: a riverine ecotype called river trout or Salmo trutta morpha fario ; a lacustrine ecotype or S. trutta morpha lacustris , also called the lake trout (not to be confused with

198-487: A degree that their population increased and they reached a density of 287 people per 100 square miles as opposed to 41 in the north. Scholars estimate that, by the year 1600, the indigenous population of New England had reached 70,000–100,000. The French encountered Algonquian peoples in this area through their trade and limited colonization of New France along the Mississippi and Ohio rivers. The historic peoples of

264-525: A favoured target for fly fishing . Sea trout are fished for especially at night using wet flies . Brown trout can be caught with lures such as spoons, spinners, jigs, plugs, plastic worm imitations, and live or dead baitfish . Brown trout rarely form hybrids with other species; if they do, they are almost invariably infertile. One such example is the tiger trout , a hybrid with the brook trout . Field studies have demonstrated that brown trout fed on several animal prey species, aquatic invertebrates being

330-501: A lighter golden cast with some red spotting and fewer dark spots. Notably, both strains can show considerable individual variation from this general description. Early stocking efforts in the United States used fish taken from Scotland and Germany . The brown trout is a medium-sized fish, growing to 20 kg (44 lb) or more and a length of about 100 cm (39 in) in some localities, although in many smaller rivers,

396-652: A marked reduction in intraspecific competition in the fish population, facilitating the partitioning of resources. First feeding of newly emerged fry is very important for brown trout survival in this phase of the lifecycle, and first feeding can occur even prior to emergence. Fry start to feed before complete yolk absorption and the diet composition of newly emerged brown trout is composed of small prey such as chironomid larvae or baetid nymphs. The species has been widely introduced for sport fishing into North America , South America , Australia , New Zealand , and many other countries, including Bhutan , where they are

462-526: A mature weight of 1.0 kg (2.2 lb) or less is common. S. t. lacustris reaches an average length of 40–80 cm (16–31 in) with a maximum length of 140 cm (55 in) and about 60 pounds (27 kg). On September 11, 2009, a 41.45-lb (18.80-kg) brown trout was caught by Tom Healy in the Manistee River system in Michigan, setting a new state record. As of late December 2009,

528-580: A popular game fish of European anglers for centuries. It was first mentioned in angling literature as "fish with speckled skins" by Roman author Aelian ( circa 200 AD) in On the Nature of Animals . This work is credited with describing the first instance of fly fishing for trout, the trout being the brown trout found in Macedonia. The Treatyse of Fysshynge with an Angle (1496) by Dame Juliana Berners , O.S.B

594-421: A reduction in dissolved oxygen levels which can cause "summer kills" of local populations if temperatures remain high for sufficient duration and deeper/cooler or fast, turbulent more oxygenated water is not accessible to the fish. This phenomenon can be further exacerbated by eutrophication of rivers due to pollution —often from the use of agricultural fertilizers within the drainage basin . Overfishing

660-452: A seasonal economy. The basic social unit was the village: a few hundred people related by a clan kinship structure. Villages were temporary and mobile. The people moved to locations of greatest natural food supply, often breaking into smaller units or gathering as the circumstances required. This custom resulted in a certain degree of intertribal mobility, especially in troubled times. In warm weather, they constructed portable wigwams ,

726-564: A slender body with a long, narrow head. The mouth is large, and on its roof, vomerine teeth are developed in a zig-zag pattern. The caudal fin is deltaform without forking, unlike that of the related Atlantic salmon ( Salmo salar ). Dark and red spots are often present on the sides, but do not extend to the tail. Parr trout (juvenile) often have a red margin on their adipose fin , with dark blotches along their sides that also become inconspicuous with age. Freshwater brown trout range in colour from largely silver with relatively few spots and

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792-628: A time. Historians hypothesize that this practice kept the population down, with some invoking Liebig's law of the minimum . The southern Algonquians of New England relied predominantly on slash and burn agriculture. They cleared fields by burning for one or two years of cultivation, after which the village moved to another location. This is the reason the English found the region relatively cleared and ready for planting. By using various kinds of native corn (maize), beans and squash, southern New England natives were able to improve their diet to such

858-553: A type of hut usually with buckskin doors. In the winter, they erected the more substantial longhouses , in which more than one clan could reside. They cached food supplies in more permanent, semi-subterranean structures . In the spring, when the fish were spawning, they left the winter camps to build villages at coastal locations and waterfalls. In March, they caught smelt in nets and weirs , moving about in birch bark canoes . In April, they netted alewife , sturgeon and salmon . In May, they caught cod with hook and line in

924-413: A white belly, to the more well-known brassy reddish-brown cast fading to creamy white on the fish's belly, with medium-sized spots surrounded by lighter halos. The more silver forms can be mistaken for rainbow trout. Regional variants include the so-called "Loch Leven" trout, distinguished by larger fins, a slimmer body, and heavy black spotting, but lacking red spots. The continental European strain features

990-713: Is a 97-centimetre (38 in) fish caught in Milwaukee Harbor, Wisconsin on 16 December 2011. The spawning behaviour of brown trout is similar to that of the closely related Atlantic salmon . A typical female produces about 2,000 eggs per kg (900 eggs per lb) of body weight at spawning. Brown trout can live 20 years, but as with the Atlantic salmon, a high proportion of males die after spawning, and probably fewer than 20% of anadromous female kelts recover from spawning . The migratory forms grow to significantly larger sizes for their age due to abundant forage fish in

1056-590: Is a fish that feeds clean and purely, in the swiftest streams, and on the hardest gravel; and that he may justly contend with all fresh water fish, as the Mullet may with all sea fish, for precedency and daintiness of taste; and that being in right season, the most dainty palates have allowed precedency to him. Throughout the 17th, 18th, and 19th centuries, angling authors, mostly British, some French, and later American, writing about trout fishing were writing about fishing for brown trout. Once brown trout were introduced into

1122-607: Is a popular destination for fishing in northwestern Connecticut , though not on the same scale as the Farmington or Housatonic rivers. The Connecticut Department of Environmental Protection stocks the river with broodstock Atlantic Salmon between Route 118 in Harwinton / Litchfield and the Thomaston Dam, and from southern Naugatuck to Beacon Falls . The Naugatuck has a trout management area between Route 118 and

1188-427: Is a problem where anglers fail to identify and return mature female fish into the lake or stream. Each large female removed can result in thousands fewer eggs released back into the system when the remaining fish spawn. In small streams, brown trout are important predators of macroinvertebrates , and declining brown trout populations in these specific areas affect the entire aquatic food web . Global climate change

1254-487: Is also of concern. S. trutta morpha fario prefers well-oxygenated water in the temperature range of 60 to 65 °F (16 to 18 °C). S. trutta bones from an archaeological site in Italy, and ancient DNA extracted from some of these bones, indicate that both abundance and genetic diversity increased markedly during the colder Younger Dryas period, and fell during the warmer Bølling-Allerød event. Cover or structure

1320-456: Is considered a foundational work in the history of recreational fishing , especially fly fishing. One of the most prominent fish described in the work is the brown trout of English rivers and streams: The trout, because he is a right dainty fish and also a right fervent biter, we shall speak of next. He is in season from March until Michaelmas. He is on clean gravel bottom and in a stream. The renowned The Compleat Angler (1653) by Izaak Walton

1386-454: Is important to trout, and they are more likely to be found near submerged rocks and logs, undercut banks, and overhanging vegetation. Structure provides protection from predators, bright sunlight, and higher water temperatures. Access to deep water for protection in winter freezes, or fast water for protection from low oxygen levels in summer are also ideal. Trout are more often found in heavy and strong currents. Defining characteristics include

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1452-657: Is not used as a source of human drinking water. As part of the Housatonic River watershed, the Naugatuck River historically hosted the southernmost Atlantic salmon ( Salmo salar ) migrations. Historical runs of anadromous fish also included native American shad ( Alosa sapidissima , Connecticut's state fish), alewife ( Alosa pseudoharengus ) and blueback herring ( Alosa aestivalis ). Dam construction for hydropower, cooling and rinse water, and boiler water for industry began circa 1763 and continued during

1518-501: Is now followed by Connecticut Route 8 . The river enters a forested, hilly area between Connecticut Route 118 and Thomaston . The largely industrialized cities of the Naugatuck River Valley were developed on each side of the river, with periodic sections of forested areas, before it enters the Housatonic River at Derby , at about 3 feet (0.91 m) above sea level. From the early 19th century, when towns along

1584-425: Is replete with advice on "the trout": The Trout is a fish highly valued, both in this and foreign nations. He may be justly said, as the old poet said of wine, and we English say of venison, to be a generous fish: a fish that is so like the buck, that he also has his seasons; for it is observed, that he comes in and goes out of season with the stag and buck. Gesner says, his name is of a German offspring; and says he

1650-941: The Arctic Ocean to the Atlas Mountains in North Africa. The western limit of their native range is Iceland in the north Atlantic, while the eastern limit is in Aral Sea tributaries in Afghanistan and Pakistan . Brown trout have been widely introduced into suitable environments around the world, including North and South America, Australasia, Asia, and South and East Africa. Introduced brown trout have established self-sustaining, wild populations in many introduced countries. The first introductions were in Australia in 1864 when 300 of 1500 brown trout eggs from

1716-637: The Canadian Prairies . The Arapaho , Blackfoot and Cheyenne developed as indigenous to the Great Plains . Brown trout Salmo trutta morpha trutta Salmo trutta morpha fario Salmo trutta morpha lacustris The brown trout ( Salmo trutta ) is a species of salmonid ray-finned fish and the most widely distributed species of the genus Salmo , endemic to most of Europe , West Asia and parts of North Africa , and has been widely introduced globally as

1782-842: The Cold Spring Hatchery operated by Mather, one in Caledonia, New York , operated by pisciculturalist Seth Green , and other hatchery in Northville, Michigan . Additional shipments of "von Behr" brown trout eggs arrived in 1884. In 1885, brown trout eggs from Loch Leven, Scotland , arrived in New York. These "Loch Leven" brown trout were distributed to the same hatcheries. Over the next few years, additional eggs from Scotland, England, and Germany were shipped to U.S. hatcheries. Behnke (2007) believed all life forms of brown trout—anadromous, riverine, and lacustrine—were imported into

1848-574: The Natal and Cape Provinces of South Africa took place in 1890 and 1892, respectively. By 1909, brown trout were established in the mountains of Kenya . The first introductions into the Himalayas in northern India took place in 1868, and by 1900, brown trout were established in Kashmir and Madras . In the 1950s and 1960s, Edgar Albert de la Rue  [ fr ] , a French geologist, began

1914-636: The Northwest Territories . Introductions into South America began in 1904 in Argentina . Brown trout are now established in Chile , Peru and the Falklands . Sea-run forms of brown trout exceeding 20 lb (9.1 kg) are caught by local anglers on a regular basis. The first introductions into the U.S. started in 1883 when Fred Mather , a New York pisciculturist and angler , under

1980-762: The River Itchen survived a four-month voyage from Falmouth, Cornwall to Melbourne on the sailing ship Norfolk . By 1866, 171 young brown trout were surviving in a Plenty River hatchery in Tasmania . Thirty-eight young trout were released in the river, a tributary of the River Derwent in 1866. By 1868, the Plenty River hosted a self-sustaining population of brown trout which became a brood source for continued introduction of brown trout into Australian and New Zealand rivers. Successful introductions into

2046-739: The West Country , mort in North West England , and white trout in Ireland. The lacustrine and riverine morphs of brown trout are both potamodromous , meaning they are also migratory, though only between freshwater bodies. Lacustrine trout mainly inhabit large lakes with calm and stratified deep water, while riverine trout forms fluvial populations typically in large rivers but sometimes in shallower creeks and alpine streams , both still migrating upstream during reproductive seasons. Anadromous and potamodromous morphs coexisting in

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2112-635: The lake trout in North America ); and anadromous populations known as the sea trout or S. trutta morpha trutta , which upon adulthood migrate downstream to the oceans for much of its life and only returns to fresh water to spawn in the gravel beds of headstreams . Sea trout in Ireland and Great Britain have many regional names: sewin in Wales , finnock in Scotland , peal in

2178-568: The ocean ; and trout , smelt , striped bass and flounder in the estuaries and streams. Putting out to sea, they hunted whales , porpoises , walruses and seals . They gathered scallops , mussels , clams and crabs and, in southern New Jersey, harvested clams year-round. From April through October, natives hunted migratory birds and their eggs: Canada geese , brant , mourning doves and others. In July and August they gathered strawberries , raspberries , blueberries and nuts. In September, they split into small groups and moved up

2244-922: The Algonquian peoples is not known. At the time of the European arrival, the hegemonic Iroquois Confederacy , based in present-day New York and Pennsylvania , was regularly at war with their Algonquian neighbors. The Algonquian peoples include and have included historical populations in: Colonists in the Massachusetts Bay area first encountered the Wampanoag , Massachusett , Nipmuc , Pennacook , Penobscot , Passamaquoddy , and Quinnipiac . The Mohegan , Pequot , Pocumtuc , Podunk , Tunxis , and Narragansett were based in southern New England. The Abenaki were located in northern New England: present-day Maine, New Hampshire, and Vermont in what became

2310-705: The Illinois Country were the Shawnee , Illiniwek , Kickapoo , Menominee , Miami , Sauk and Meskwaki . The latter were also known as the Sac and Fox, and later known as the Meskwaki Indians, who lived throughout the present-day Midwest of the United States. During the nineteenth century, many Native Americans from east of the Mississippi River were displaced over great distances through

2376-419: The Naugatuck River began industrializing and dumping industrial waste and sewage into its waters, it gradually gained a reputation as "Connecticut's dirtiest river." Cleanup efforts from the 1980s into the 2000s were successful in removing much of the most obvious contamination. However, occasional sewage spills continued to occur, and a 2017 study identified the presence of phthalates in the river. The Naugatuck

2442-516: The Naugatuck River is 11.4 miles (18.3 km) long and originates in Winchester as a tributary of Lake Winchester at an elevation of about 1,250 feet (380 m). The West Branch, 5.9 miles (9.5 km) long, begins at the confluence of Jakes Brook, Hart Brook and Hall Meadow Brook in the western part of Torrington, at an elevation of 800 feet (240 m). From this point on, the Naugatuck River has been followed by early paths and roadways and

2508-668: The Platts Mill Dam (Naugatuck) were removed in 1999, while the Kinneytown Dam was bypassed with a fish ladder that same year. The Chase Brass Dam, between Waterbury and Thomaston, was removed in 2004. A fish bypass channel, the first of its kind in New England, now permits fish to migrate past the Tingue Dam and opens an additional 32 miles (51 km) of the river to anadromous fish migration. The installation of

2574-777: The Thomaston Dam. It is considered a "trophy trout stream" the rest of its length between the confluence of the East and West Branches and the Kinneytown Dam in Seymour . Landmarks of note associated with the Naugatuck include Reynolds Bridge , an open-spandrel concrete arch bridge in Thomaston which carries Waterbury Road over the river. Built in 1928, the crossing is listed on the National Register of Historic Places . Algonquian peoples The Algonquians are one of

2640-498: The U.S. By 1900, 38 states and two territories had received stocks of brown trout. Their adaptability resulted in most of these introductions establishing wild, self-sustaining populations. The fish is not considered to be endangered , although some individual stocks are under various degrees of stress mainly through habitat degradation, overfishing , and artificial propagation leading to introgression . Increased frequency of excessively warm water temperatures in high summer causes

2706-721: The U.S. and intermingled genetically to create what he calls the American generic brown trout and a single subspecies the North European brown trout ( S. t. trutta ). In April 1884, the U.S. Fish Commission released 4900 brown trout fry into the Baldwin River , a tributary of the Pere Marquette River in Michigan. This was the first release of brown trout into U.S. waters. Between 1884 and 1890, brown trout were introduced into suitable habitats throughout

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2772-511: The U.S. in the 1880s, they became a major subject of American angling literature. In 1889, Frederic M. Halford , a British angler, author published Dry-Fly Fishing in Theory and Practice , a seminal work codifying a half century of evolution of fly fishing with floating flies for brown trout. In the late 19th century, American angler and writer Theodore Gordon , often called the "Father of American Dry Fly Fishing", perfected dry-fly techniques for

2838-568: The United States and eastern Quebec in what became Canada. They traded with French colonists who settled along the Atlantic coast and the Saint Lawrence River. The Mahican were located in western New England in the upper Hudson River Valley (around present-day Albany, New York). These groups cultivated crops, hunted, and fished. The Algonquians of New England such as the Piscataway (who spoke Eastern Algonquian ), practised

2904-641: The United States passage and enforcement of Indian removal legislation; they forced the people west of the Mississippi River to what they designated as Indian Territory . After the US extinguished Indian land claims, this area was admitted as the state of Oklahoma in the early 20th century. Ojibwe/Chippewa, Odawa , Potawatomi , and a variety of Cree groups lived in Upper Peninsula of Michigan , Western Ontario , Wisconsin , Minnesota , and

2970-552: The authority of the U.S. Fish Commissioner, Spencer Baird , obtained brown trout eggs from a Baron Lucius von Behr, president of the German Fishing Society  [ de ] . The von Behr brown trout came from both mountain streams and large lakes in the Black Forest region of Baden-Württemberg . The original shipment of "von Behr" brown trout eggs were handled by three hatcheries, one on Long Island ,

3036-619: The entire river over time. The valley was later settled in the 17th century by English colonists. Given its rocky soil, which was not good for farming, and the high potential for water power, the Naugatuck Valley became an industrialized area in the 19th century. It has been associated with the brass and copper industries. After winding through rural forested areas, the two branches of the Naugatuck River enter downtown Torrington and join just north of East Albert Street at about 530 feet (160 m) above sea level. The East Branch of

3102-399: The family Galaxiidae , which also have affinity for well-oxygenated, cold streams. Brown trout additionally are voracious predators of invertebrates and can carry microbial pathogens like Aeromonas salmonicida . Genetic background is a very important factor when determining the success of trout populations, this information is vital to restore and enhance previous populations. Because of

3168-577: The first comprehensive text, The Book of The Sea Trout , specifically addressing angling techniques for the anadromous forms of brown trout. Introductions of brown trout into the American West created new angling opportunities, none so successful from an angling perspective as was the introduction of browns into the upper Firehole River in Yellowstone National Park in 1890. One of the earliest accounts of trout fishing in

3234-758: The fish bypass on the Tingue Dam in Seymour leaves only the Plume and Atwood Dam in Thomaston as the last barrier on the river to fish migration. The State of Connecticut Department of Energy and Environmental Protection (DEEP) stocks surplus Atlantic salmon ( Salmo salar ) from the Connecticut River restoration effort in the Naugatuck River each fall. DEEP also stocks several salmonid species including native brook trout ( Salvelinus fontinalis ) and non-native sea-run brown trout ( Salmo trutta ) and rainbow trout ( Oncorhynchus mykiss ). The Naugatuck River

3300-855: The fish captured by Healy was confirmed by both the International Game Fish Association and the Fresh Water Fishing Hall of Fame as the new all-tackle world record for the species. This fish, which supplanted the former world record from the Little Red River in Arkansas, has in turn been exceeded by a 20.1-kilogram (44 lb) specimen caught in the Ohau Canal in Twizel, New Zealand on 27 October 2020. The all-tackle length IGFA world record

3366-516: The focus of a specialised fly fishery. The first planting in the United States occurred on April 11, 1884, into the Baldwin River, one mile east of Baldwin, Michigan . Brown trout have had serious negative impacts on upland native fish species in some of the countries where they have been introduced, particularly Australia. In Chile , Australia , New Zealand and other locations in the southern hemisphere, brown trout compete with fish from

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3432-416: The industrial revolution of the 1800s. These dams, as well as wastewater from the towns that grew up around factories along the river, contributed to the extirpation of many species of fish. Over time and with the closing of many of the factories, the dams ceased to provide hydropower or serve any other economic purpose. The Anaconda Dam (Waterbury), Freight Street Dam (Waterbury), Union City Dam (Naugatuck) and

3498-522: The introduction of several species of salmonids on the remote Kerguelen Islands in the southern Indian Ocean . Of the seven species introduced, only brook trout , Salvelinus fontinalis , and brown trout survived to establish wild populations. The first introductions in Canada occurred in 1883 in Newfoundland and continued until 1933. The only Canadian regions without brown trout are Yukon and

3564-426: The most abundant prey items. However, brown trout also feed on other taxa such as terrestrial invertebrates (e.g. Hymenoptera) or other fish. Moreover, in brown trout, as in many other fish species, a change in the diet composition normally occurs during the life of the fish, and piscivorous behaviour is most frequent in large brown trout. These shifts in the diet during fish lifecycle transitions may be accompanied by

3630-657: The most populous and widespread North American indigenous North American groups, consisting of the peoples who speak Algonquian languages . They historically were prominent along the Atlantic Coast and in the interior regions along Saint Lawrence River and around the Great Lakes . Before contact with Europeans, most Algonquian settlements lived by hunting and fishing, with many of them supplementing their diet by cultivating corn , beans and squash (the " Three Sisters" ). The Ojibwe cultivated wild rice . At

3696-595: The newly arrived, but difficult-to-catch brown trout in Catskill rivers such as the Beaverkill and Neversink Rivers . In the early 20th century, British angler and author G. E. M. Skues pioneered nymphing techniques for brown trout on English chalk streams. His Minor Tactics of the Chalk Stream (1910) began a revolution in fly fishing techniques for trout. In 1917, Scottish author Hamish Stuart published

3762-441: The park is from Mary Trowbridge Townsend's 1897 article in Outing Magazine "A Woman's Trout Fishing in Yellowstone Park" in which she talks about catching the von Behr trout in the river: Long dashes down stream taxed my unsteady footing; the sharp click and whirr of the reel resounded in desperate efforts to hold him somewhat in check; another headlong dash, then a vicious bulldog shake of the head as he sawed back and forth across

3828-418: The rocks. Every wile inherited from generations of wily ancestors was tried until, in a moment of exhaustion, the net was slipped under him. Wading ashore with my prize, I had barely time to notice his size—a good four-pounder, and unusual markings, large yellow spots encircled by black, with great brilliancy of iridescent color—when back he flopped into the water and was gone. However, I took afterward several of

3894-470: The same river appear genetically identical. What determines whether they migrate to sea or not remains unknown. The scientific name of the brown trout is Salmo trutta . The specific epithet trutta derives from the Latin trutta , meaning, literally, " trout ". Behnke (2007) relates that the brown trout was the first species of trout described in the 1758 edition of Systema Naturae by Swedish zoologist Carl Linnaeus . Systema Naturae established

3960-512: The same variety, known in the Park as the Von Baer [sic] trout, and which I have since found to be the Salmo fario , the veritable trout of Izaak Walton. Within the US, brown trout introductions have created self-sustaining fisheries throughout the country. Many are considered "world-class" such as in the Great Lakes and in several Arkansas tailwaters. Outside the U.S. and outside its native range in Europe, introduced brown trout have created "world-class" fisheries in New Zealand, Patagonia , and

4026-445: The streams to the forest. There, they hunted beaver , caribou , moose and white-tailed deer . In December, when the snows began, the people created larger winter camps in sheltered locations, where they built or reconstructed longhouses. February and March were lean times. The tribes in southern New England and other northern latitudes had to rely on cached food. Northerners developed a practice of going hungry for several days at

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4092-399: The system of binomial nomenclature for animals . Salmo trutta was used to describe anadromous or sea-run forms of brown trout. Linnaeus also described two other brown trout species in 1758. Salmo fario was used for riverine forms. Salmo lacustris was used for lake-dwelling forms. The native range of brown trout extends from northern Norway and White Sea tributaries in Russia in

4158-403: The time of the first European settlements in North America , Algonquian peoples resided in present-day Canada east of the Rocky Mountains , New England , New Jersey , southeastern New York , Delaware , and down the Atlantic Coast to the Upper South , and around the Great Lakes in present-day Illinois , Indiana , Iowa , Michigan , Minnesota , and Wisconsin . The precise homeland of

4224-413: The trout's importance as a food and game fish, it has been artificially propagated and stocked in many places in its range, and fully natural populations (uncontaminated by allopatric genomes ) probably exist only in isolated places, for example in Corsica or in high alpine valleys on the European mainland. Farming of brown trout has included the production of infertile triploid fish by increasing

4290-670: The water temperature just after fertilisation of eggs, or more reliably, by a process known as pressure shocking. Triploids are favoured by anglers because they grow faster and larger than diploid trout. Proponents of stocking triploids argue, because they are infertile, they can be introduced into an environment that contains wild brown trout without the negative effects of cross-breeding. However, stocking triploids may damage wild stocks in other ways. Triploids certainly compete with diploid fish for food, space, and other resources. They could also be more aggressive than diploid fish and they may disturb spawning behaviour. The brown trout has been

4356-456: The waters where they spend most of their lives. Sea trout are more commonly female in less nutrient-rich rivers. Brown trout are active both by day and by night and are opportunistic feeders. While in freshwater, their diets frequently include invertebrates from the streambed , other fish, frogs, mice, birds, and insects flying near the water's surface. The high dietary reliance upon insect larvae , pupae , nymphs , and adults allows trout to be

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