The main selective pressure in this scenario is the fish population. Since the long-legged birds rely on fish for food and there is a significant decline in fish populations, this creates a selective pressure that affects the survival and reproductive success of the long-legged birds. In contrast, the short-legged birds that eat insects are not affected by this decline, as the insect population remains stable.
Consider the following scenario:
A significant decline in fish populations occurs in the habitat of a semi-aquatic bird population. There are two groups of birds in the population that differ in leg length and diet. Long-legged birds eat fish, while short-legged birds eat insects. The insect population remains stable.
What is the main selective pressure in this scenario?
(1 point)
Responses
leg length
leg length
fish population
fish population
insect population
insect population
bird population
1 answer