Q. Consider the following:

  1. Bats
  2. Bears
  3. Rodents

The phenomenon of hibernation can be observed in which of the above kinds of animals?

  • 1 and 2 only
  • 2 only
  • 1, 2 and 3
  • Hibernation cannot be observed in any of the above

Answer: (c) 1, 2 and 3

Hibernation
  • Hibernation is a state of minimal activity and metabolic depression undergone by some animal species. Hibernation is a seasonal heterothermy characterized by low body-temperature, slow breathing and heart-rate, and low metabolic rate.
  • It is found in bats, bears, rodents etc. It most commonly occurs during winter months.
  • Hibernation functions to conserve energy when sufficient food is not available. To achieve this energy saving, an endothermic animal decreases its metabolic rate and thereby its body temperature.
  • Hibernation may last days, weeks, or months—depending on the species, ambient temperature, time of year, and the individual’s body-condition.
  • Before entering hibernation, animals need to store enough energy to last through the duration of their dormant period, possibly as long as an entire winter. Larger species become hyperphagic, eating a large amount of food and storing the energy in their bodies in the form of fat deposits.
Hibernation