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Rainbow trout was collected in lakes of all sizes, depths, and elevations, ranging from low to high levels of lake disturbance and relatively oligotrophic to eutrophic waters.
Trophic means concerned with nutrition, and oligotrophic lakes are poorly fed; that is, they have a low concentration of nutrient elements such as nitrogen and phosphorus.
Lake trout are the only major native sport fish adapted to the deep, cold water of oligotrophic (low-nutrient) lakes, such as those often found in northern Canada and the northern Great Lakes region
Given the dearth of nutrients in their environment, these oligotrophic bacteria must generate their energy from a variety of sources.
Redberry Lake, an oligotrophic saline lake in central Saskatchewan, is located in a hydrologically closed basin and has high levels of DOC.
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