|
Deep lakes are usually cold, because the sun does not heat deeper layers of water, and since the penetration of its rays in the water is limited, the growth of plants on the bottom is also limited. This type of lake is a perfect habitat for lake trout and lake whitefish, who hang out in deep cold water during summer then migrate to shallow areas in fall to reproduce. Lake trout need rocky shoals to spawn, whereas lake whitefish use hard or stony bottoms. The presence of these varied habitats is essential to the survival of these fish populations.
|