Rainbow Trout
Oncorhynchus mykiss
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Habitat: Eastern Pacific: Alaska to Baja California, Mexico. One of the most widely introduced fishes, may be regarded as global in its present distribution. In the tropics restricted to areas above 1,200 m. Several countries report adverse ecological impact after introduction.
Biology: The natural habitat of the species is fresh water with about 12°C in summer. It is unclear whether its anadromy is a truly genetic adaptation or simply an opportunistic behavior. It seems that any stock of rainbow trout is capable of migrating, or at least adapting to sea water, if the need or opportunity arises. They require moderate to fast flowing, well oxygenated waters for breeding, but they also live in cold lakes. Rainbow trout survive better in lakes than in streams. Generally feeds close to the bottom. Adults feed on aquatic and terrestial insects, molluscs, crustaceans, fish eggs, minnows, and other small fishes (including other trout); young feed predominantly on zooplankton. Utilized fresh, smoked, canned, and frozen; eaten steamed, fried, broiled, boiled, microwaved and baked. Rainbow trout is cultured in many countries and is often hatched and stocked into rivers and lake especially to attract recreational fishers.
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