Why are fish near the water treatment facility plant smaller

Why are fish near the water treatment facility plant smaller than fish in cooler areas of stream?

Hypothesis should discuss surface area to volume ration how this relates to metabolic demands thermal regulation and how this affects size of fish

No chemical in the wastewater impact the fish.

Solution

Ans) Areas of cool water in lakes and streams called thermal refugia. Fishes are near the water treatment facility plants because there amount of Ammonia is less. Generally, a temperature is most important factor for aquatic fishes/animals.Metabolic rate and the reproductive activities are controlled by temperature. Metabolic activity increases with increased temperature, thus increasing a fish’s demand for oxygen; however; an increase in stream temperature also causes a decrease in DO.

Fulton’s condition factor, K = W/L3 , where W is the weight and L the length. As the equation implies, a larger condition will result when the fish is heavier relative to its length.