According to the information that can best describe why during the warmer parts of the day, When the fish are found in deeper waters of a lake is that warmth lowers the oxygen concentration near the surface.
What is a Warm temperature?
Organisms in any aquatic ecosystem need oxygen to fulfill their functions and survive. But the availability of liquefied oxygen in water, especially at the surface, can be influenced by environmental temperature. Warm temperature reduces the dissolution of oxygen in the lake surface water, encouraging fish to locomote to deeper areas. Lower temperatures raise the dissolution and availability of water at the surface, so fish can be discovered closer to the surface when the weather is cold. This manner of dissolution/availability of oxygen at the lake surface can be watched with seasonal modifications or with temperature changes between day and night.
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