A test of Rensch's rule in greater horseshoe bat (Rhinolophus ferrumequinum) with female-biased sexual size dimorphism.
A test of Rensch's rule in greater horseshoe bat (Rhinolophus ferrumequinum) with female-biased sexual size dimorphism.
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DOI：
10.1371/journal.pone.0086085
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发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
Feng J
中科院分区：
文献类型：
--
作者：
Wu H;Jiang T;Huang X;Lin H;Wang H;Wang L;Niu H;Feng J
性别大小二态性（SSD）在动物界广泛存在。Rensch法则描述了固态硬盘和体型之间的关系：当雄性体型较大时，固态硬盘随体型增大而增大；当雌性体型较大时，固态硬盘随体型减小。Rensch的规则在雄性偏大的分类群中得到了很好的支持，但在雌性偏大的分类群中异速生长的模式是混合的，有支持和反对这一规则的证据。此外，大多数研究对不同分类群的Rensch规则进行了研究；但在支持Rensch规则的种群研究中缺乏，特别是在仅显示轻微SSD的分类群中。在这里，我们测试了大马蹄蝠的SSD种内变异模式是否符合Rensch规则，并评估了纬度对Rensch规则的贡献。我们的研究结果显示，在较大的马蹄蝠中，SSD始终偏向于雌性，尽管雌性的体型只比雄性的体型稍大。log10（雄）对log10（雌）的长轴回归斜率与1有显著差异。大掌蝠的前臂长度与纬度呈显著负相关，雄掌蝠的体长在纬度上比雌掌蝠略陡，但不显著。我们认为，在较大的马蹄蝠种群中，SSD模式的变化与Rensch规则一致，即雄性是更可变的性别。男性的身体尺寸与纬度的关系并不比女性更陡峭，这表明性别特异性的身体尺寸的纬度变化可能不是Rensch规则的重要影响因素。未来对更大的马蹄蝠的研究可能最好集中在更全面的机制上，推动女性偏向的SSD变异模式。
Sexual size dimorphism (SSD) is widespread within the animal kingdom. Rensch’s rule describes a relationship between SSD and body size: SSD increases with body size when males are the larger sex, and decreases with body size when females are the larger sex. Rensch’s rule is well supported for taxa that exhibit male-biased SSD but patterns of allometry among taxa with female-biased size dimorphism are mixed, there is evidence both for and against the rule. Furthermore, most studies have investigated Rensch’s rule across a variety of taxa; but among-population studies supporting Rensch’s rule are lacking, especially in taxa that display only slight SSD. Here, we tested whether patterns of intraspecific variation in SSD in greater horseshoe bats conform to Rensch’s rule, and evaluated the contribution of latitude to Rensch’s rule. Our results showed SSD was consistently female-biased in greater horseshoe bats, although female body size was only slightly larger than male body size. The slope of major axis regression of log10 (male) on log10 (female) was significantly different from 1. Forearm length for both sexes of greater horseshoe bats was significantly negatively correlated with latitude, and males displayed a slightly but nonsignificant steeper latitudinal cline in body size than females. We suggest that variation in patterns of SSD among greater horseshoe bat populations is consistent with Rensch’s rule indicating that males were the more variable sex. Males did not have a steeper body size–latitude relationship than females suggesting that sex-specific latitudinal variation in body size may not be an important contributing factor to Rensch’s rule. Future research on greater horseshoe bats might best focus on more comprehensive mechanisms driving the pattern of female-biased SSD variation.
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影响因子：
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作者：
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DOI：
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发表时间：
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影响因子：
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