![]() As they grow and mature, they start to disperse in search of suitable spawning grounds and feeding habitats. During the early life stages, bull trout are often found in small, low-gradient streams or near the shores of larger rivers and lakes. They exhibit short-distance and long-distance movements, which are crucial in maintaining healthy populations and genetic diversity. Dispersal īull trout are known for their extensive movements within river systems. Bull trout may be anadromous in coastal rivers, and individual bull trout have been found to have migrated from one coastal river to another by the ocean. Thus, they favor the deep pools of cold lakes and large rivers, as well as high, cold mountain headwaters. īull trout have exacting habitat demands, requiring water temperatures generally below 55 ☏ (13 ☌), clean gravel beds, deep pools, complex cover such as snags and cut banks, and large systems of interconnected waterways to accommodate spawning migrations. The historical range of bull trout also included northern California, but they are likely extirpated. A population of bull trout exists east of the Continental Divide in Alberta, where it is the provincial fish. confluentus is found in the cold, clear waters of the high mountains and coastal rivers of northwestern North America, including Yukon, British Columbia, Washington, Oregon, Idaho, and western Montana, as well as the Jarbidge River of northern Nevada and perhaps Alaska. Distribution and habitat Ĭore distribution of bull trout ( Salvelinus confluentus) in U.S. Bull trout lack the deeply forked tail fin of lake trout ( S. fontinalis) by the absence of distinct spots on the dorsal fin, as well as yellow, orange, or salmon-colored spots on the back as opposed to red spots with blue halos on the brook trout. Bull trout can be differentiated from brook trout ( S. Migratory bull trout are typically much larger than resident bull trout, which rarely exceed 2 kg (4.4 lb). Bull trout may be either migratory, moving throughout large river systems, lakes, and the ocean, or they may be resident, remaining in the same stream their entire lives. Bull trout have been recorded measuring up to 103 cm (41 in) in length and weighing 14.5 kg (32 lb). Its head and mouth are unusually large for salmonids, giving it its name. ![]() Like other species of char, the fins of a bull trout have white leading edges. The Saskatchewan-Nelson Rivers population in Alberta, Canada is listed as threatened under the Species at Risk Act. Endangered Species Act, and bull trout overall are listed as vulnerable to extinction on the IUCN Red List of Threatened Species. Populations of bull trout in the lower 48 states are listed as threatened under the U.S. ![]() malma), but was reclassified as a separate species in 1980. confluentus has been known as the " Dolly Varden" ( S. The bull trout ( Salvelinus confluentus) is a char of the family Salmonidae native to northwestern North America.
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