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Volume 50, Number 4 >

Growth pattern and seasonal weight changes of the feral raccoon (Procyon lotor) in Hokkaido, Japan

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Title: Growth pattern and seasonal weight changes of the feral raccoon (Procyon lotor) in Hokkaido, Japan
Authors: Asano, Makoto Browse this author
Matoba, Yohei Browse this author
Ikeda, Toru Browse this author
Suzuki, Masatsugu Browse this author
Asakawa, Mitsuhiko Browse this author
Ohtaishi, Noriyuki Browse this author
Keywords: body size
Procyon lotor
seasonal change
Issue Date: 28-Feb-2003
Publisher: The Graduate School of Veterinary Medicine
Journal Title: Japanese Journal of Veterinary Research
Volume: 50
Issue: 4
Start Page: 165
End Page: 173
Abstract: The growth pattern and seasonal weight fluctuations of feral raccoons in Hokkaido were evaluated between 1999 and 2001. The growth rates in body length and body weight were described for juveniles (young of the year) and yearlings (animals born in the previous season) using the Gompertz growth model. The asymptotic body sizes for males were greater than those for females. Young raccoons born during spring in the study area could potentially grow up to their asymptotic size at the beginning of their first winter, but they would not reach their full adult sizes until at least their second fall. Adult raccoons (animals ≥ 2-year-old) had seasonal weight fluctuations with annual weight loss of 25% to 28% of mean maximum weights in west-central Hokkaido, but these result would be an underestimate of the degree of annual weight fluctuations. Juvenile raccoons can be distinguished from the older animals by measuring body length or body weight during fall in Hokkaido.
Type: bulletin (article)
Appears in Collections:Japanese Journal of Veterinary Research > Volume 50, Number 4

Submitter: 獣医学部図書室

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