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Lake Trout Information
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Lake Trout (Salvelinus namaycush)

Appearance
: Two dorsal fins including one adipose fin, light spots on darker gray background, lower fins edged with white, tail forked, 11 rays in anal fin. Its coloring is :light spots on darker background, light underside and it is ofte called the gray trout. The body, colored light green or grey, dark green, brown or almost black with lighter colored spots is typically troutlike, elongate.

Habits
The Lake Trout or "salmon trout" as it is sometimes called, is native to North America and the largest trout native to the Great Lakes. This fish strongly prefers a water temperature of 45-55 degrees F. While the Lake Trout may be found in shallow water only 10 to 15 feet deep in spring and fall, it follows these frigid water temperatures to depths of 100 to 200 feet in the summer and winter. This restless denizen of the cold, deep waters is a true wanderer, often ranging many miles in

of prey. A relentless hunter, the Lake Trout feeds primarily on other fish. Although it seems to have a peculiar penchant for ciscoes, it also concentrates on alewives, smelt or sculpin (dead or alive), and sometimes takes crustaceans, insects, other fish, and even small mammals.

Reproduction
Many Lake Trout seem to return each fall to use the same spawning beds, although some don't show this homing behavior. The eggs are deposited after dark, often on shoals. Young Lake Trout become sexually mature at 6 or 7 years of age. The average adult weighs in at 9 - 10 pounds but some individuals weigh up to 50 pounds (the Michigan record is 61 1bs and 8 oz). The life-span of the Lake Trout may exceed 25 years.

Predators
Parasitization by sea lampreys severely reduced the Lake Trout populations in Michigan from 1935 to 1965. Chemical contaminants and over-fishing pressures have also contributed to the problem, but with better fishing management and control of the lamprey and pollution problems, the invaluable Lake Trout is coming back.

An unusual from of Lake Trout occurs in the deep waters of Lake Superior, and is called a cisowet. This "fat trout" spawns at depths greater than 300 feet and is edible only when smoked. In Lake Superior individuals exist covering the entire spectrum from this odd type to the familiar form of Lake Trout.

Lake Trout have also be successfully hybridized with brook trout to form the "splake," obtained by fertilizing Lake Trout eggs with brook trout sperm. Splake released in the Great Lakes and recaptured 5 or 6 years later have weighed up to 16 pounds. Splake are intermediate between the parent species in appearance.

Lake Trout are avidly sought after by both commercial and sport anglers, for food as well as for the sport.

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