The cost of sex: quantifying energetic investment in gamete production by males and females.
The cost of sex: quantifying energetic investment in gamete production by males and females.
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DOI：
10.1371/journal.pone.0016557
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发表时间：
2011-01-24
期刊：
影响因子：
3.7
通讯作者：
Gillooly JF
中科院分区：
文献类型：
--
作者：
Hayward A;Gillooly JF
两性之间对生殖的相对积极投入构成了进化生物学中性选择和生活史理论的基础。人们通常认为雄性在配子上的投入比雌性少得多，但量化两性配子生产的能量成本仍然是一个艰巨的挑战。对于广泛的物种多样性（无脊椎动物、爬行动物、两栖动物、鱼类、鸟类和哺乳动物），我们从性腺组织的投资和配子生物量生产速率方面比较了两性之间的配子生产成本。两性的性腺生物量投资几乎与体重成正比，但雌性配子生物量生产率大约高出两到四个数量级。在雄性和雌性中，配子生物量生产率随着生物体质量的增加呈幂律增加，就像个体代谢率一样。这表明整个生物体的能量学可能是物种间配子产生的主要限制因素。精子生成率的残余变异与相对睾丸大小呈正相关。总之，这些结果表明，了解物种间配子产生率的异质性需要共同考虑性腺质量和新陈代谢的影响。
The relative energetic investment in reproduction between the sexes forms the basis of sexual selection and life history theories in evolutionary biology. It is often assumed that males invest considerably less in gametes than females, but quantifying the energetic cost of gamete production in both sexes has remained a difficult challenge. For a broad diversity of species (invertebrates, reptiles, amphibians, fishes, birds, and mammals), we compared the cost of gamete production between the sexes in terms of the investment in gonad tissue and the rate of gamete biomass production. Investment in gonad biomass was nearly proportional to body mass in both sexes, but gamete biomass production rate was approximately two to four orders of magnitude higher in females. In both males and females, gamete biomass production rate increased with organism mass as a power law, much like individual metabolic rate. This suggests that whole-organism energetics may act as a primary constraint on gamete production among species. Residual variation in sperm production rate was positively correlated with relative testes size. Together, these results suggest that understanding the heterogeneity in rates of gamete production among species requires joint consideration of the effects of gonad mass and metabolism.
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影响因子：
2
作者：
Dodds, PS;Rothman, DH;Weitz, JS
通讯作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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