The main selective pressure in this scenario is the fish population. The decline in fish populations affects the long-legged birds that rely on fish for food, while the short-legged birds that eat insects remain unaffected. This creates a situation where the long-legged birds face greater challenges in survival and reproduction due to the lack of available food, thereby influencing their population dynamics.
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
insect population
insect population
bird population
bird population
fish population
fish population
leg length
1 answer