Multiple Choice
Pheasants do not feed their chicks. Immediately after hatching, a pheasant chick starts pecking at seeds and insects on the ground. How might a behavioral ecologist explain the ultimate cause of this behavior?
49. Animal Behavior
Animal Behavior
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Which of the following is an example of a circannual rhythm?
A
Mosquitoes are most active at dawn and dusk.
B
Just as the sun sets, bats leave the cave in large swarms.
C
Fiddler crabs exhibit courtship behavior based on the phase of the moon.
D
In the heat of the day, most of the mammals at the zoo rest in the shade.
E
Every spring robins gather in the park to build nests and reproduce.
Verified step by step guidance1
Understand the concept of circannual rhythms: These are biological processes that occur on a yearly cycle, often influenced by seasonal changes.
Identify the key characteristics of circannual rhythms: They typically involve behaviors or physiological changes that align with the seasons, such as migration, hibernation, or reproduction.
Analyze each option provided in the problem: Determine whether the behavior described is influenced by a yearly cycle or a different type of rhythm.
Evaluate the option 'Every spring robins gather in the park to build nests and reproduce': This behavior is linked to the spring season, indicating a yearly cycle, which is characteristic of a circannual rhythm.
Conclude that the correct example of a circannual rhythm is the behavior of robins gathering every spring to build nests and reproduce, as it aligns with the definition of a circannual rhythm.
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