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, L. David Mech Museum of Natural History, Department of Veterinary Diagnostic Laboratories, and Museum of Natural History, University of Minnesota, Minneapolis and St. Paul Search for other works by this author on: Oxford Academic Donald M. Barnes Museum of Natural History, Department of Veterinary Diagnostic Laboratories, and Museum of Natural History, University of Minnesota, Minneapolis and St. Paul Search for other works by this author on: Oxford Academic John R. Tester Museum of Natural History, Department of Veterinary Diagnostic Laboratories, and Museum of Natural History, University of Minnesota, Minneapolis and St. Paul Search for other works by this author on: Oxford Academic
Journal of Mammalogy, Volume 49, Issue 1, 20 February 1968, Pages 63–73, https://doi.org/10.2307/1377728
Published:
20 February 1968
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Accepted:
30 October 1967
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L. David Mech, Donald M. Barnes, John R. Tester, Seasonal Weight Changes, Mortality, and Population Structure of Raccoons in Minnesota, Journal of Mammalogy, Volume 49, Issue 1, 20 February 1968, Pages 63–73, https://doi.org/10.2307/1377728
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Abstract
A population of raccoons (Procyon lotor) in east-central Minnesota was studied from September 1964 through October 1966. Sixty-three individuals were radio-tagged, and an automatic tracking system monitored their presence in the population for 3367 raccoon days for yearlings and adults and 3518 days for juveniles. Data are presented on weight loss and mortality in this population. Juveniles, yearlings, and adults lost about half their weight during winter dormancy, and many juveniles died from starvation and parasitism, the most important mortality factors in this relatively unhunted population. Late winter and early spring were the most critical periods for juveniles. Limited data on population structure indicated an even ratio of yearlings to adults and an even sex ratio in yearlings and adults, although there was a heavy bias toward males in a sample of 20 raccoons born on the study area in 1965.
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1968 American Society of Mammalogists
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