title: Lemming cycles in captivity.
abstract: 2 freely growing confined populations of Norwegian lemmings displayed population peaks and declines which were similar to natural populations. In most other studies of confined populations of rodents, the number of animals stabilized and maintained fairly constant numbers. Juvenile mortality and reduced pregnancy rate contributed to the decline.
mesh_terms: D000818:Animals; D005260:Female; D008297:Male; D010507:Periodicity; D011157:Population Dynamics; D012377:Rodentia / Q000502:physiology*