In midsummer, you are fishing at a lake. You catch the most fish at the inlet of a stream into the lake, where logs and branches are creating turbulent flow and mixing deep water with the shallow water near the surface of the lake. What is the probable reason the fish are congregating in this area?

Question

Quizplus · Accepted Answer

The turbulent flow created by the logs and branches is mixing deep water with shallow water, which likely increases oxygen levels in the area. This higher oxygen content would benefit the fish by aiding gill oxygen uptake, which could explain why they are congregating in this spot to feed. The other choices do not necessarily make sense, as warmer temperatures do not always stimulate metabolism and lower oxygen content would not help transfer oxygen into the fish's gills.

In Midsummer, You Are Fishing at a Lake