Rainbow Trout Research Paper

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Map Rainbow Trout Range Fast Facts Type: Fish Diet: Carnivore Average life span in the wild: 4 to 6 years Size: 20 to 30 in (51 to 76 cm) Weight: 8 lbs (3.6 kg) Group name: Hover Did you know? The largest rainbow trout on record weighed 57 lbs (25.8 kg) and was estimated to be 11 years old. Size relative to a tea cup: The sperm of rainbow trout contains protamine, which counters the anticoagulant heparin. Protamine was originally isolated from fish sperm, but is now produced synthetically. The rainbow trout is native only to the rivers and lakes of North America, west of the Rocky Mountains, but its value as a hard-fighting game fish and tasty meal has led to its introduction throughout the world. Rainbow…show more content…
Their populations are healthy worldwide and they have no special status or protections. However, they are now considered a non-native pest species in some areas where they have been introduced. The rainbow trout (Oncorhynchus mykiss) is a species of salmonid native to tributaries of the Pacific Ocean in Asia and North America. The steelhead is a sea run rainbow trout (anadromous) usually returning to freshwater to spawn after 2 to 3 years at sea. In other words, rainbow trout and steelhead trout are the same species. The fish is sometimes called a salmon trout. Several other fish in the salmonid family are called trout, some are anadromous like salmon, whereas others are resident in freshwater only. Rainbow trout are predators with a varied diet, and will eat nearly anything they can grab. Their image as a selective eater is only a legend. Rainbows are not quite as piscivorous or aggressive as brown trout or lake trout (char). Young rainbows survive on insects, fish eggs, smaller fish (up to 1/3 of their length), along with crayfish and other crustaceans. As they grow, though, the proportion of fish increases in most all populations. Some lake dwelling lines may become planktonic feeders. While in flowing waters populated with salmonids, trout eat varied fish eggs, including salmon, cutthroat trout, as well as the eggs of other rainbow trout, alevin, fry, smolt and even left-over

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