Problem 1 - Biology: The Dynamic Science

Question

According to optimal foraging theory, predators: a. always feed on the largest prey possible. b. always feed on the prey that are easiest to catch. c. choose prey based on the costs of capturing and consuming it compared with the energy it provides. d. feed on plants when animal prey are scarce. e. have coevolved mechanisms to overcome prey defenses.

Step-by-Step Solution

Answer

The correct answer is c. Under the Optimal Foraging Theory, predators choose prey based on the costs of capturing and consuming it compared with the energy it provides.

Step 1: Understand Optimal Foraging Theory's basic principle

Optimal Foraging Theory (OFT) is a model in ecology based on the study of foraging behavior and decision making by animals. The theory suggests that organisms forage in such a way as to maximize their net energy intake per unit of time. That is, to capture and consume foods that provide the most energy while expending the least amount of energy possible.

Step 2: Review the options

Review each of the options in the context of Optimal Foraging Theory. Here, the primary concern is whether the choice represents an optimal strategy to maximise energy gain and minimise energy loss.

Step 3: Eliminate options that do not conform to optimal foraging theory

Options a and b do not always apply. Size and ease of capture of prey are important factors in foraging decisions, but they aren't the only factors considered according to OFT. Predators do not absolutely feed on plants when animal prey are scarce, so option d doesn't hold true. Similarly, although predators might have evolved mechanisms to overcome prey defences, it's not the primary idea of OFT, hence option e is also ruled out.

Step 4: Identify the correct option

Option c reflects the principle of Optimal Foraging Theory. Predators choose prey based on the costs of capturing and consuming it compared with the energy it provides. This answers the question of 'optimality' in foraging behaviour, pursuing actions that lead to the highest payoff while minimising costs.