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The acclimated trout are then collected, and the eggs are gently massaged out of the female trout into a collection vessel, and then inseminated with the milt of a male brook. Next, the inseminated eggs are strained of the milt and transferred to a jar for several weeks to develop into viable embryos .
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.
After courtship, the female enters the nest, turns upside down, and deposits her eggs on the ceiling, where they adhere. Typically several females will deposit eggs in a nest, then the male fertilizes and guards them, fanning the eggs with his pectoral fins. Mottled sculpin occurrence is discontinuous in its range.
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 ...
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 tiger trout (Salmo trutta fario × Salvelinus fontinalis) is a genetic cross between a river trout and a brook trout. It gets its name from its characteristic golden-yellow markings. Tiger trout are sterile, although male and female trout may be distinguished by their external markings. The female tiger trout does not develop any gonads.
[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]
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