Brown trout4/29/2023 ![]() Habitat: In the United States, brown trout are found in freshwater streams and lakes. Native Origin: Seas of Eurasia including Baltic, Caspian, Black and Atlantic Ocean Current Location Since then, brown trout have been stocked by local and state agencies across the country for sport fishing. In 1886, Pennsylvania began stocking the fish in streams where native brook trout populations had been severely decreased by logging, farming and dam construction. The eggs were then distributed to the Norville Hatchery in Michigan. Salmo trutta eggs were first imported from German hatcheries into the United States in 1883 to Cold Spring Harbor, New York. Brown trout establish their territories when they are juveniles and mature 3-4 years of age. They them move downstream or into lakes for the first two years of their life. The larvae stay in the redd for 2-3 weeks until they are about. The female covers the fertilized eggs with sand and fine gravel, and both adults leave. As she does this, the male released his milt to fertilize them. The female hollows out a redd (nest), in which to release her eggs. Brown trout has been nominated as one of the “100 of the ‘World’s Worst’ invasive alien species” by the IUCN and Global Invasive Species Programme.īrown trout spawn from October to December in shallow (1 ft. Also, even though it is rare, the brown trout can hybridize with native trout species and can then reduce native trout populations. They have been implicated in population reductions of the brook trout ( Salvelinus fontinalis) and Modo sucker ( Catostomus microps) which is an endangered fish in California. As aggressive defenders of territories, they can displace native fishes from prime habitat. They grow larger and faster than native species and have been reported to reduce trout populations by predation. ![]() Adults in the United Kingdom can be 13-16 inches long and weigh up to 10 pounds.īrown trout may compete with other native trout and salmon species for food. ![]() The anal fin has 9-10 rays and the tail is square. There are two dorsal fins, with the rear one being a reddish, fat-filled fin. Red spots with blue outer-circles and plain black spots are apparent in the stream-dwelling brown trout but faint on the ones found in lakes. The sides of the fish are yellow or silvery and the bellies can be white to yellow. Salmo trutta is called the Brown trout because of its brown to gold-brown colorations.
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