Sexual dimorphism and scaling of energetics in flying foxes of the genus Pteropus
Sexual dimorphism and scaling of energetics in flying foxes of the genus Pteropus
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DOI：
10.1644/1545-1542(2001)082
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发表时间：
2001-08-01
影响因子：
1.7
通讯作者：
Armstrong, MI
中科院分区：
文献类型：
--
作者：
McNab, BK;Armstrong, MI
本文测定了狐蝠属5种狐蝠的能量学随环境温度的变化。这些数据和文献中的2个物种进行了检查，身体大小和它们在大陆或小岛上的分布。Log（10）体重解释了这7个物种log（10）基础代谢率变异的94%。雌性属于大型物种的狐蝠小于同种男性，因此有较低的（总）基础率比男性。在这项分析中，除体重外，没有其他因素与狐蝠的基础心率相关。然而，在21种狐蝠的背景下，大陆狐蝠的基础率比小岛屿特有种高28%。岛的大小的影响并没有表现在狐蝠，当单独检查，因为最小的物种研究是小岛的专家，和最大的物种生活在大陆上，这意味着质量和岛屿大小的影响是混淆，这导致了一个高缩放功率（1.06）在这个属的基础率。狐蝠的Log（10）热导率随log（10）体重的增加而增加，按哺乳动物标准，5种狐蝠的热导率较低。体温与体重无关。
The energetics of 5 species of the flying fox genus Pteropus were measured with respect to ambient temperature. These data and those from 2 species in the literature were examined in relation to body size and to their distribution on continents or small islands. Log(10) body mass accounted for 94% of the variation in log(10) basal rate of metabolism of those 7 species. Females belonging to large species of Pteropus were smaller than conspecific males and consequently had lower (total) basal rates than males. No factor other than body mass in this analysis was correlated with basal rate in Pteropus. However, in the context of 21 species of pteropodids, continental Pteropus have basal rates that are 28% greater than small-island endemics. The effect of island size was not demonstrated in Pteropus, when examined alone, because the smallest species studied are small-island specialists, and the largest species live on continents, which means that effects of mass and island size are confounded, which leads to a high scaling power (1.06) for basal rate in this genus. Log(10) thermal conductance in Pteropus increased with log,, body mass, 5 species having low thermal conductances by mammalian standards. Body temperature was independent of body mass.