Sex-specific conditional mating preferences in a cichlid fish: implications for sexual conflict
Sex-specific conditional mating preferences in a cichlid fish: implications for sexual conflict
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DOI：
10.1007/s00265-013-1543-4
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发表时间：
2013-07-01
影响因子：
2.3
通讯作者：
Thuenken, Timo
中科院分区：
文献类型：
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作者：
Baldauf, Sebastian A.;Engqvist, Leif;Thuenken, Timo
有条件的交配策略使个人能够根据“个人状态”来调节他们的交配行为，以最大限度地提高适应性。理论预测，个体素质的差异会导致择偶偏好的差异。然而，经验证据是稀缺的，特别是在男性和女性的战略变化。在这里，我们的实验研究质量依赖的变化，在交配的喜好，可靠的质量指标Pelvicachromis taeniatus，一个色彩缤纷的慈鲷鱼相互交配选择和reproduction。雄性以及雌性通过不同的饲养制度人工操纵表型质量。两性的装饰与个体素质有关。雌雄个体在不同的方向上表现出不同的条件交配策略。男性表现出谨慎的选择，更喜欢类似质量的女性。与男性相比，低质量的女性更喜欢高质量的男性，而高质量的女性既不喜欢高质量的男性，也不喜欢低质量的男性。结果表明，个人的目标是根据个人素质的具体利益。此外，冲突的条件交配偏好的男性和女性可能会导致性冲突，这意味着一个高度动态的交配系统，即使在没有环境变化的演变。
Conditional mating strategies enable individuals to modulate their mating behaviour depending on 'individual status' to maximise fitness. Theory predicts that variation in individual quality can lead to differences in mating preferences. However, empirical evidence is scarce particular in terms of variation in male and female strategies. Here, we experimentally investigated quality-dependent variation in mating preferences concerning reliable quality indicators in Pelvicachromis taeniatus, a colourful cichlid fish with mutual mate choice and ornamentation. Males as well as females were artificially manipulated in phenotypic quality by different feeding regimes. Ornamentation was connected to individual quality in both sexes. Males and females showed conditional mating strategies in different directions. Males showed prudent choice by preferring females of similar quality. In contrast to males, low-quality females preferred highly ornamented males, whereas high-quality females showed neither preferences for high- nor for low-quality males. The results suggest that individuals aim for specific benefits depending on individual quality. Furthermore, the conflicting conditional mating preferences of males and females might lead to sexual conflict, implicating a highly dynamical mating system that evolves even in absence of environmental changes.