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Juvenile brook trout grown in a rearing tank by the fish and wildlife services Since the 1800s, brook trout populations have been grown by artificial propagation and aquaculture . [ 9 ] Artificial propagation in fish is the process by which eggs are inseminated , hatched, and grown in a controlled environment that minimizes unfavorable ...
The backcross is the result of an F1 splake male being crossed with a female lake trout (i.e., 75% lake trout and 25% brook trout). Although splake were first described in 1880, Ontario began experimenting with the hybrids in the 1960s in an effort to replace collapsed lake trout stocks in the Great Lakes.
Trout in winter constantly cruise in shallow depths looking for food, usually traveling in groups, although bigger fish may travel alone and in water that's somewhat deeper, around 12 feet (3.7 m). Rainbow, Brown, and Brook trout are the most common trout species caught through the ice. [9]
Brook trout occupy only a fraction of their pre-colonial range. European settlement and the introduction of non-native species like brown trout had much to do with that. (Brown trout were despised ...
The Dolly Varden trout (Salvelinus malma) is a species of salmonid ray-finned fish native to cold-water tributaries of the Pacific Ocean in Asia and North America.Despite the name "trout" (which typically refers to freshwater species from the genera Salmo and Oncorhynchus), it belongs to the genus Salvelinus (chars), which includes 51 recognized species, the most prominent being the brook ...
[60] [61] [62] Brook trout and Rocky Mountain cutthroat trout exploit very similar niches and directly compete with each other. However, because brook trout have many reproductive advantages (earlier maturation, greater fertility, and offspring emerge earlier in the year), brook trout are able to replace cutthroat very quickly. [7] [63] [64] [65]
Preferring cooler water, brook trout were easily displaced by introduced brown and rainbow trout in the lower reaches of the major river systems. Today brook trout exist in the upper Firehole River above Kepler Cascades and in other Firehole tributaries like the Little Firehole River, Iron Spring and Sentinel Creeks.
Lake trout are known to hybridize in nature with the brook trout; such hybrids, known as "splake", are normally sterile but self-sustaining populations exist in some lakes. [12] Splake are also artificially propagated in hatcheries, and then stocked into lakes in an effort to provide sport-fishing opportunities. [13]