Consider da following scenario

Question

A significant decline in fish Population occurs in da habitat of a semi-aquatic birds' population. There r two groups of birds in da population dat differ in leg length n diet. Long-legged Birds eat fish, while shirt legged birds eat insects da insect population remains stale.

Wut is da main selective pressure in dis scenario

A ) Insect population

B ) Bird populations

C ) Lg length

D ) Fish population

Answer 1

The main selective pressure in this scenario is D) Fish population.

The decline in the fish population directly affects the long-legged birds, which rely on fish as their primary food source. As the availability of fish decreases, the long-legged birds would face increased competition for food, leading to greater selection pressure on them. In contrast, the short-legged birds that feed on insects would not be affected by the decline in fish, as their food source remains stable. Thus, the decline in the fish population creates a significant pressure that impacts the long-legged birds directly.