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Fishing planet california natural eggs9/22/2023 ![]() The anadromous strain is known for its rapid growth, achieving 7-10 kg within 3 years, whereas the freshwater strain can only attain 4.5 kg in the same time span. The rainbow trout is a hardy fish that is easy to spawn, fast growing, tolerant of a wide range of environments and handling, and the large fry can be easily weaned on to an artificial diet (usually feeding on zooplankton).Ĭapable of occupying many different habitats, ranging from an anadromous life history (strain known as steelhead, living in the ocean but spawning in gravel-bottomed, fast-flowing, well-oxygenated rivers and streams) to permanently inhabiting lakes. Main producer countries of Oncorhynchus mykiss Some of them have relatively insignificant output in comparison to the production from the larger systems that are located in the primary producing areas in Europe, North America, Chile, Japan and Australia. ![]() Many countries were reporting rainbow trout farming production. As a result, several local domesticated strains have developed (eg Shasta and Kamloops), while others have arisen through mass selection and cross-breeding for improved cultural qualities. Trout fisheries are maintained, or culture practised, in the upland catchments of many tropical and sub-tropical countries of Asia, East Africa and South America. Production greatly expanded in the 1950s as pelleted feeds were developed. Since 1874 it has been introduced to waters on all continents except Antarctica, for recreational angling and aquaculture purposes. Rainbow trout are native to the Pacific drainages of North America, ranging from Alaska to Mexico.
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