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Population limitation and the wolves of Isle Royale

Journal of Mammalogy

By:
, ORCID iD , , , and
https://doi.org/10.2307/1383091

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Abstract

Population regulation for gray wolves in Isle Royale National Park, Michigan, was examined in 1987-1995 when wolves were in chronic decline following a crash of the population in 1981-1982. Canine parvovirus (CPV-2) was probably influential during the crash, but it disappeared by the late 1980s. High mortality abruptly ceased after 1988, but low recruitment in the absence of disease and obvious shortage of food prevented recovery of the wolf population. In 1983-1995, with a comparable number of moose '10 years old as potential prey, wolves were only half as numerous as in 1959-1980. A simulation of annual fluctuations in effective population size (Ne) for wolves on Isle Royale suggests that their genetic heterozygosity has declined ca. 13% with each generation and ca. 80% in the 50- year history of this population. Inbreeding depression and stochastic demographic variation both remain possible explanations for recent low recruitment.

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Additional publication details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Population limitation and the wolves of Isle Royale
Series title:
Journal of Mammalogy
DOI:
10.2307/1383091
Volume:
79
Issue:
3
Year Published:
1998
Language:
English
Publisher:
American Society of Mammalogists
Contributing office(s):
National Wildlife Health Center
Description:
14 p.
First page:
828
Last page:
841
Country:
United States
State:
Michigan
Other Geospatial:
Isle Royal National Park
Online Only (Y/N):
N
Additional Online Files (Y/N):
N