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Brown Trout Salmo trutta

Brown Trout Salmo trutta.

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Brown Trout Salmo trutta

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  1. Brown Trout Salmotrutta Brown trout are brownish in color. With sides that are dark-brown to gray-brown, with yellow-brown to silvery lower sides. They are covered with large, dark spots that are outlined with pale halos and also have reddish-orange or yellow spots scattered on the sides. The fins are clear, yellow-brown, and unmarked. Older males may develop a long, hooked jaw and will brighten in color. Brown trout can live up to 10 to 12 years. Brown trout eat both aquatic and terrestrial insects, crayfish and other crustaceans, and especially fish. They use their mouth and sharp teeth to “suck” their food in and hold it in place while it is swallowed whole. Brown trout can eat young fish that are up to almost two thirds their body length! Yum! The brown trout swims through its freshwater environment by using the strong, segmented muscles of its body to move its strong caudal fin back and forth from in a side to side motion and is capable of quick movements. The brown trout lives in cold or cool streams, rivers, lakes and reservoirs. Brown trout survive best in water temperatures that range somewhere around 50 to 60 degrees, but can survive in water temperatures in the low 70s. Brown trout lay their eggs in the fall (November) in stream gravel depressions that the female prepares with her fins. Females may produce up to 4,000 to 12,000 eggs. Several males may accompany the female during spawning. The eggs hatch the following spring, with no parental attention. Brown trout are bilaterally symmetrical, which means that they have paired internal organs as well as external structures that are mirrored. The brown trout can be found in each and every one of Pennsylvania’s watersheds. In the above image, you can see some newly hatched brown trout young and some yet to hatch eggs. Aren’t they cute?

  2. Works citedwww.fish.state.pa.us/pafish/fishhtms/chap2.htmhttp://imagecache5.art.com/p/MED/37/3783/FE8IF00Z/jane-burton-brown-trout-newly-hatched-alevins-and-eggs-ready-to-hatch_-from-europe_-life-cycle-sequence-414.jpg

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