Heritability of the algal-foraging ability:: an indirect benefit of female mate preference for males' carotenoid-based coloration in the guppy, Poecilia reticulata
Heritability of the algal-foraging ability:: an indirect benefit of female mate preference for males' carotenoid-based coloration in the guppy, Poecilia reticulata
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DOI：
10.1007/s00265-005-0001-3
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发表时间：
2005-11-01
影响因子：
2.3
通讯作者：
Shinjo, S
中科院分区：
文献类型：
--
作者：
Karino, K;Utagawa, T;Shinjo, S
一些性选择理论假设女性择偶偏好的某些好处。直接利益，即，雄性对其后代和雌性的直接贡献，已经得到了很好的经验检验。然而，间接的好处，即，雄性对后代的遗传贡献，一直没有得到充分的证明。雌性偏好雄性的类胡萝卜素为基础的颜色是已知的一些动物。由于动物必须通过食物获得类胡萝卜素，因此通常假设类胡萝卜素颜色的亮度是雄性觅食能力的可靠指标。因此，女性的间接利益，如更大的觅食能力，在他们的后代，通过配偶偏好的类胡萝卜素为基础的颜色被假定。然而，作为类胡萝卜素资源的食物的觅食能力的遗传力尚未得到测试。本研究采用迷宫实验研究孔雀鱼对藻类类胡萝卜素资源觅食能力的遗传力。在本实验中完成藻类觅食任务的潜伏期表现出很高的个体差异。觅食能力的遗传估计是实质性的（h（2）停止= 0.57 - 0.66）和显着的，这表明从父亲到他们的后代的觅食能力的遗传贡献。这一结果可能支持间接利益影响女性选择进化的假设。
Several sexual selection theories assume certain benefits of female mate preference. The direct benefit, i.e., the direct contribution from males to their offspring and females, has been well tested empirically. However, the indirect benefit, i.e., the male's genetic contribution to their offspring, has been poorly demonstrated. Female preference for males' carotenoid-based coloration is known in some animals. Since animals must acquire carotenoids through foods, it is often hypothesized that the brightness of the carotenoid-based coloration is a reliable indicator of the male's foraging ability. Hence, females' indirect benefits, such as greater foraging ability in their offspring, through mate preference for the carotenoid-based coloration are assumed. However, the heritability of the foraging ability for foods that serve as carotenoid resources has not been tested. In this study, a maze experiment was performed in guppies (Poecilia reticulata) to examine the heritability of the foraging ability for algae, carotenoid resources in nature. The latency for completing algal-foraging tasks in this experiment showed high individual variation. Heritable estimates of the foraging ability were substantial (h(2) stop = 0.57 - 0.66) and significant, suggesting a genetic contribution to the foraging ability from fathers to their offspring. This result may support the hypothesis that indirect benefits influence the evolution of female choice.