期刊
OECOLOGIA
卷 150, 期 1, 页码 155-160出版社
SPRINGER
DOI: 10.1007/s00442-006-0499-8
关键词
Bergmann's rule; fish farming
类别
Using museum data of adult specimens whose sex, age, and locality are known, we studied temporal and geographical body size trends among the otter, Lutra lutra, in Norway. We found that body size of the otters increased during the last quarter of the twentieth century, and suggest that this trend is related to increased food availability from fish farming and possibly also to energy saving due to elevated sea temperatures. Birth year and death year explained 38.8 and 43.5%, respectively, of the variation in body size. Body size of otters was positively related to latitude, thus conforming to Bergmann's rule.
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