They are distributed naturally throughout North America, northern Asia and Europe. We have reports that claim a female brown trout can live up to more than 20 years. Trout are closely related to salmon and char (or charr): species termed salmon and char occur in the same genera as do fish called trout (Oncorhynchus – Pacific salmon and trout, Salmo – Atlantic salmon and various trout, Salvelinus – char and trout). 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. Despite severely impacting the distribution and abundance of native Australian fish, such as the climbing galaxias, millions of rainbow and other trout species are released annually from government and private hatcheries. So a 50 inch is 50 years old. , 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. Several species of trout were introduced to Australia and New Zealand by amateur fishing enthusiasts in the 19th century, effectively displacing and endangering several upland native fish species. , Global climate change is also of concern. Corn worms are also excellent live-bait when trout fishing. In: New Advances and Contributions to Fish Biology, Hakan Türker (Ed.). 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. Non-native salmonids were introduced to enrich recreational fishing, however, they quickly started outcompeting and displacing native salmonids upon their arrival. Sea trout are fished for especially at night using wet flies. It is also recommended to use a hook size 8-5 for trout of all kind. So chances are that the duo are still swimming away merrily in Californian waters. Additionally, they provide a good fight when caught with a hook and line, and are sought after recreationally. There are reports of female brown trout living to be more than 20 years in age. Brook trout live 3 to 6 years, brown trout live up to 20 years, lake trout live 20 or more years, and rainbow trout live a maximum of about 11 years. Trout are an important food source for humans and wildlife, including brown bears, birds of prey such as eagles, and other animals.  Brown trout have had serious negative impacts on upland native fish species in some of the countries where they have been introduced, particularly Australia. Brown trout can be very long-lived. Native salmonid fish in the western and southwestern United States are threatened by non-native species that were introduced decades ago. Mostly, these colors and patterns form as camouflage, based on the surroundings, and will change as the fish moves to different habitats. Brown Trout usually live for five to six years, although ages of eight and nine years are not uncommon in waters that are not frequently fished. Brown Trout feed on small fish and crustaceans.  What determines whether or not they migrate remains unknown. Brown bears lifespan. Their adaptability resulted in most of these introductions establishing wild, self-sustaining populations.. Understanding how moving water shapes the stream channel makes it easier to find trout. In general, lake- and sea-run fish grow larger than their river-dwelling counterparts, but some tailwaters also grow especially large specimens. , Fishing for trout under the ice generally occurs in depths of 4 to 8 feet. Defining characteristics include a slender, reddish-brown body with a long, narrow head. Just about all … , Stocking, farming and non-native brown trout. There are many species, and even more populations, that are isolated from each other and morphologically different. Trout are species of freshwater fish belonging to the genera Oncorhynchus, Salmo and Salvelinus, all of the subfamily Salmoninae of the family Salmonidae. Increased frequency of excessively warm water temperatures in high summer causes 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.  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. Arctic char and brook trout are part of the char family. Most trout are born, grow up, lay eggs and die in lakes or streams. (2005). Brown and rainbow trout are mature in 3 to 4 years and lake trout are mature in 6 to 8 years.  Most of their diet comes from macroinvertebrates, or animals that do not have a backbone like snails, worms’ insects, etc. 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 the focus of a specialised fly fishery. 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. Ontogenetic dietary shifts in a predatory freshwater fish species: the brown trout as an example of a dynamic fish species. The only Canadian regions without brown trout are Yukon and the Northwest Territories. The first introductions into the Himalayas in northern India took place in 1868, and by 1900, brown trout were established in Kashmir and Madras.. Growth rates in lakes are typically faster, with three-year-old Brown Trout reaching 11-18 inches and four-year-olds averaging 13-21 inche… The all-tackle world record for a brown trout was held for 17 years by Arkansas angler Howard “Rip” Collins, with a 40-pound, 4-ounce behemoth caught from the Little Red River in 1992.  The original shipment of "von Behr" brown trout eggs were handled by three hatcheries, one on Long Island, the Cold Spring Hatchery operated by Mather, one in Caledonia, New York, operated by pisciculturalist Seth Green, and other hatchery in Northville, Michigan. Salmo trutta morpha fario Runs are deeper than riffles with a moderate current and are found between riffles and pools. But surgens from what I been told by numerous of people is 1 inch per year.  The ash lowers water quality, making it more difficult for the Gila trout to survive. Best live bait for big brown trout? It is recommended that when fishing for trout, that the fisher(s) should use line in the 4–8 lb test for streamfish, and stronger line with the same diameter for trout from the sea or from a large lake, such as Lake Michigan. The swim bladder is connected to the esophagus, allowing for gulping or rapid expulsion of air, a condition known as physostome. In general, trout that are about to breed have extremely intense coloration and can look like an entirely different fish outside of spawning season. Each large female removed can result in thousands fewer eggs released back into the system when the remaining fish spawn. Anadromous and nonanadromous morphs coexisting in the same river appear genetically identical. Gesner says, his name is of a German offspring; and says he 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. Riffles have a fast current and shallow water. Trout prefer cold water (50-60° F) streams to spawn and live, but warming water temperatures are altering this ecosystem and further deteriorative native populations. 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.. Trout usually spawn just above or below riffles, but may spawn right in them. Another threat is other introduced organisms. The word trout is also used as part of the name of some non-salmonid fish such as Cynoscion nebulosus, the spotted seatrout or speckled trout. trutta). 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.