Lake Trout
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Lake Trout
Salvelinus namaycush
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Found in Lakes:
Michigan, Huron and Superior . Some inland Lakes
These swift, torpedo-shaped fish inhabit the cold waters of an area extending
from Wisconsin and Upper Michigan to the northernmost reaches of the North
American continent. For more than half a century, lake trout were the most
valuable commercial fish in the Upper Great Lakes. Then overfishing and
the onslaught of the sea lamprey from the late 1930s and into the 1950s
effectively eliminated this fish from Lake Michigan.
Thanks to sea lamprey control and continuous stocking, lake trout now live
seven or more years in the lake, thriving on a diet of chubs and sculpins
(their traditional prey), smelt and alewives. As a result, the return of
this preeminent native, along with the introduction of Pacific salmon, has
created a thriving world-class sport fishery in Lake Michigan. Biologists
hope that ongoing research and plantings of these fish on historic spawning
reefs will yet restore reproducing stocks of lake trout in Lake Michigan
and enhance the few surviving stocks in Lake Superior.
Lake trout are long-lived and do not reach sexual maturity until 6-8 years
of age. While the average lake trout in Lake Michigan today weighs around
seven pounds, some of the larger trophy fish are three feet long and weigh
as much as 25 pounds.
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Three Lake Trout sub-species inhabit Lake Superior. Lean Lake Trout(RedFins) inhabit shallower inshore water generally from 40-220 ft. deep. They have a straight pointed snout, slender body, and low fat content. Usually more colorful than their offshore cousins. Excellent table fare. Siscowet Lake Trout or (Fats) have a convex snout, robust body, and high fat content. They are typically found in water from 150-350 ft. deep. They are not very good to eat. They are a gray color. They are the Lake Trout found in the lower Great Lakes. Humper Lake Trout have a snout similar to the Lean and have large eyes. They are found on isolated shoals(Stannard Rock, Superior Shoal) that are surrounded by waters over 350 feet deep. They have an intermediate fat content and are excellent table fare. Contrary to popular belief, Lake Trout are caught at all depths in the water column. Their primary diet is smelt, lake herring and opossum shrimp. They prefer water temperature in the 49-54 F range. The Splake is a crossbred Lake Trout and Brook Trout which are cousins. It was thought that originally they cannot reproduce, but recently are now thought to have done so. They are very good to eat. They look similar to the Lean Lake Trout and have wormy marks on their back.
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