Sexual dimorphism in primate aerobic capacity: a phylogenetic test.
Sexual dimorphism in primate aerobic capacity: a phylogenetic test.
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DOI：
10.1111/j.1420-9101.2010.01983.x
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发表时间：
2010-06-01
影响因子：
2.1
通讯作者：
Nunn CL
中科院分区：
文献类型：
--
作者：
Lindenfors P;Revell LJ;Nunn CL
男性的性内竞争应该有利于增强男性的体能。这反过来又会导致男性比女性具有更大的有氧能力（即，性二型），以及有氧能力的性二型与物种间性选择强度之间的相关性。然而，生理缩放定律预测，有氧能力应低于每单位体重在较大的动物比在较小的动物，可能会减少或扭转性别差异及其与性选择的措施。我们使用45种灵长类动物的红细胞压积和红细胞（RBC）计数来测试与性选择和体重相关的四个预测：（i）平均而言，男性的有氧能力应高于女性，（ii）成年男性的有氧能力应高于少年男性，（iii）有氧能力应随着性选择的增加而增加，而且（iv）有氧能力的测量应该与体重负相关。对于前两个预测，我们使用了本研究开发的系统发育配对t检验。我们发现支持预测（i）和（ii）。然而，对于预测（iii），我们发现性选择的程度和有氧能力之间呈负相关，这与我们的预测相反。预测（四）得到普遍支持。我们还调查了底物使用，基础代谢率和敏捷性是否影响氧运输的生理指标，但我们发现RBC计数和敏捷性之间的相关性只有微弱的证据。
Male intrasexual competition should favour increased male physical prowess. This should in turn result in greater aerobic capacity in males than in females (i.e., sexual dimorphism), and a correlation between sexual dimorphism in aerobic capacity and the strength of sexual selection among species. However, physiological scaling laws predict that aerobic capacity should be lower per unit body mass in larger than in smaller animals, potentially reducing or reversing the sex difference and its association with measures of sexual selection. We used measures of hematocrit and red blood cell (RBC) counts from 45 species of primates to test four predictions related to sexual selection and body mass: (i) on average, males should have higher aerobic capacity than females, (ii) aerobic capacity should be higher in adult than juvenile males, (iii) aerobic capacity should increase with increasing sexual selection, but also that (iv) measures of aerobic capacity should covary negatively with body mass. For the first two predictions we used a phylogenetic paired t-test developed for this study. We found support for predictions (i) and (ii). For prediction (iii), however, we found a negative correlation between the degree of sexual selection and aerobic capacity, which was opposite to our prediction. Prediction (iv) was generally supported. We also investigated whether substrate use, basal metabolic rate, and agility influenced physiological measures of oxygen transport, but we found only weak evidence for a correlation between RBC count and agility.
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影响因子：
3.4
作者：
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