In cod fishing, older and larger fish are more likely to be retained in nets than younger and smaller fish. Despite the removal of these large breeders, the population is still reproducing. How do you think cod characteristics have changed due to the selection pressure from over-fishing?
A) Selection has led to increased growth rates.
B) Selection has led to decreased growth rates.
C) Selection has led to decreases in the size of fish at the age of maturity.
D) Selection has led to increases in the age of fish at the age of maturity.

Question

Quizplus · Accepted Answer

The selection pressure from over-fishing likely favors fish that mature at a smaller size, as larger fish are more likely to be caught. This results in a decrease in the size of fish at the age of maturity.

In Cod Fishing, Older and Larger Fish Are More Likely