日本北海道野生浣熊（北美浣熊）的生长模式和季节性体重变化

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

作者信息

Asano Makoto, Matoba Yohei, Ikeda Toru, Suzuki Masatsugu, Asakawa Mitsuhiko, Ohtaishi Noriyuki

机构信息

Laboratory of Wildlife Biology, Department of Environmental Veterinary Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818, Japan.

出版信息

Jpn J Vet Res. 2003 Feb;50(4):165-73.

PMID:12675552

Abstract

The growth pattern and seasonal weight fluctuations of feral raccoons in Hokkaido were evaluated between 1999 and 2001. The growth rates inbody 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 > or = 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.

摘要

1999年至2001年期间，对北海道野生浣熊的生长模式和季节性体重波动进行了评估。使用冈珀茨生长模型描述了幼崽（当年幼崽）和一岁幼兽（上一季出生的动物）的体长和体重生长率。雄性的渐近体型大于雌性。研究区域春季出生的小浣熊有可能在第一个冬季开始时生长到其渐近体型，但至少要到第二个秋季才会达到其完全成年体型。成年浣熊（年龄≥2岁的动物）在北海道中西部有季节性体重波动，年体重损失为平均最大体重的25%至28%，但这些结果会低估年体重波动的程度。在北海道秋季，通过测量体长或体重可以区分幼年浣熊和成年浣熊。