As the main threat to populations is over-harvest, angling is now regulated.Ĭurrent management Fish Sustainability IndexĪlberta's lake trout populations have been assessed under the Fish Sustainability Index, see: Because of this late age of spawning, heavy fishing pressure can seriously deplete lake trout populations.Species somewhat limited by the small number of deep, cold lakes in Alberta.Lake trout are classified as Sensitive in the General Status of Alberta Wild Species report. Lake trout grow very slowly, and often don't mature until they are 8 to 10 years of age.Larger lake trout eat other species of fish, mostly whitefish and cisco (tullibee).Young lake trout feed on freshwater shrimp and other aquatic invertebrates.During the summer, the cold denser water sinks to the bottom of the lake and the trout follow it down.Lake trout feed near the surface of a lake when the water is cold (spring and fall).Lake trout are native to many of Alberta's deep cold lakes.During the fall spawning season, the fins near the tail become a pale orange.They are grey fish with irregular white spots. Lake trout are the least colourful of trout.Because lake trout are long-lived and can reach 20 to 25 years of age, the larger ones can exceed 10 kilograms (22 pounds) in weight.
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