期刊
EVOLUTIONARY ECOLOGY
卷 33, 期 3, 页码 449-460出版社
SPRINGER
DOI: 10.1007/s10682-019-09984-1
关键词
Age; Altitude; Bergmann's rule; Body size; Bufo minshanicus; Growth rate; Life history
资金
- Emergency Management Program of National Natural Science Foundation of China [31741019]
- Natural Science Foundation of Henan Province of China [182300410019]
- Foundation for University Key Teacher of Henan province [2016GGJS-098]
- Program for Innovative Research Team (in Science and Technology) in universities of Henan Province [17IRTSTHN019]
According to Bergmann's rule, in endothermic species, body sizes of individuals tend to be larger in colder climates compared to those in warmer climates. Some ectotherms, including amphibians, have also been found to conform to this rule. However, the validity of this rule is disputed, as it is uncertain whether Bergmann's clines are generally applicable to all anuran species. Here we studied altitudinal variation in mean body size, egg size, age, and growth rate in Bufo minshanicus across six altitudes in the eastern Tibetan Plateau. Our results showed that mean body size increased with increasing altitude, which is consistent with Bergmann's rule. Toads from higher altitudes also tended to have faster growth rates and older mean ages of reproductively mature adults, but did not have larger egg sizes. We suggest that, as growth rate is positively correlated with altitude, and it contributes to body size variation more than mean age does, then this explains why this species follows Bergmann's rule.
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