The measure and significance of Bateman's principles.
The measure and significance of Bateman's principles.
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DOI：
10.1098/rspb.2013.2973
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发表时间：
2014-05-07
期刊：
影响因子：
--
通讯作者：
Pizzari T
中科院分区：
文献类型：
--
作者：
Collet JM;Dean RF;Worley K;Richardson DS;Pizzari T
贝特曼原理通过交配成功率、繁殖成功率及其在性别内的关系（贝特曼梯度）的性别特异性差异来解释性别角色和性别二型性。然而，对这些原则的实证检验受到了严格的审查。在这里，我们的实验表明，在复制组的红原鸡，原鸡，交配和繁殖成功的男性比女性更可变，导致在一个陡峭的男性贝特曼梯度，符合贝特曼的原则。然而，我们使用新的定量技术来揭示，目前的方法通常高估了贝特曼的原则，因为它们（i）从后代的亲子关系间接推断交配成功，从而错过了未能导致受精的交配，以及（ii）通过繁殖与交配成功的单变量回归来测量贝特曼梯度，而不考虑雄性繁殖成功的其他组成部分的实质性影响，即雌性生殖力和父权份额。我们还发现了一个显着的女性贝特曼梯度，但表明这可能出现虚假的后果，男性偏好多产的女性，强调需要实验方法来建立生殖和交配成功之间的因果关系。在为贝特曼的原则提供定性支持的同时，我们的研究表明了目前的方法如何产生对性别差异和角色的误导。
Bateman's principles explain sex roles and sexual dimorphism through sex-specific variance in mating success, reproductive success and their relationships within sexes (Bateman gradients). Empirical tests of these principles, however, have come under intense scrutiny. Here, we experimentally show that in replicate groups of red junglefowl, Gallus gallus, mating and reproductive successes were more variable in males than in females, resulting in a steeper male Bateman gradient, consistent with Bateman's principles. However, we use novel quantitative techniques to reveal that current methods typically overestimate Bateman's principles because they (i) infer mating success indirectly from offspring parentage, and thus miss matings that fail to result in fertilization, and (ii) measure Bateman gradients through the univariate regression of reproductive over mating success, without considering the substantial influence of other components of male reproductive success, namely female fecundity and paternity share. We also find a significant female Bateman gradient but show that this likely emerges as spurious consequences of male preference for fecund females, emphasizing the need for experimental approaches to establish the causal relationship between reproductive and mating success. While providing qualitative support for Bateman's principles, our study demonstrates how current approaches can generate a misleading view of sex differences and roles.
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