![]() Such crosses are almost always reproductively sterile. Tiger trout rarely occur naturally but are sometimes artificially propagated. The tiger trout is an intergeneric hybrid between the brook trout and the Eurasian brown trout ( Salmo trutta). Splake grow more quickly than brook trout, become piscivorous sooner, and are more tolerant of competitors than brook trout. ![]() ![]() Although they are fertile, back-crossing in nature is behaviorally problematic and very little natural reproduction occurs. Although uncommon in nature, they are artificially propagated in substantial numbers for stocking into brook trout or lake trout habitats. The splake is an intrageneric hybrid between the brook trout and lake trout ( S. The brook trout produces hybrids both with its congeners Salvelinus namaycush and Salvelinus alpinus, and intergeneric hybrids with Salmo trutta. All three forms have the same general appearance. This generalist form rarely attains sizes larger than 12 in (30 cm) or lives for more than three years. Finally, a smaller generalist form evolved in the small lakes, ponds, rivers, and streams throughout most of the native range. A sea-run form that migrates into saltwater for short periods to feed evolved along the Atlantic coastline. A large lake form evolved in the larger lakes in the northern reaches of its range and are generally piscivorous as adults. Behnke describes three ecological forms of the brook trout. Behnke as a highly specialized form of brook trout. It is considered by fisheries biologist Robert J. agassizii), is an extinct trout species or subspecies last seen in Dublin Pond, New Hampshire, in 1930. The silver trout, ( Salvelinus agassizii or S. timagamiensis, is a subspecies native to two lakes in the Temagami District of Ontario, Canada. On the other hand, three ecological forms are distinguished. There is little recognized systematic substructure in the brook trout, but two subspecies have been proposed. The species was later moved to the char genus Salvelinus, which in North America also includes the lake trout, bull trout, Dolly Varden, and the Arctic char. The specific epithet " fontinalis" comes from the Latin for "of a spring or fountain", in reference to the clear, cold streams and ponds in its native habitat. The brook trout was first scientifically described as Salmo fontinalis by the naturalist Samuel Latham Mitchill in 1814.
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