The Evolution of Sexually Selected Traits and Antagonistic Androgen Expression in Actinopterygiian Fishes
The Evolution of Sexually Selected Traits and Antagonistic Androgen Expression in Actinopterygiian Fishes
复制标题
放线鱼性选择性状的进化和拮抗雄激素的表达
作者：
J. Mank
雄性鱼类的许多性选择特征是由睾丸激素控制的。从理论上讲，对男性装饰品的定向选择可以在进化的时间尺度上增加男性睾丸激素水平，当遗传相关时，女性睾丸激素水平也会增加。由于高睾酮的负面健身后果，这是合理的，女性的选择性选择的特点，男性的结果降低女性生殖健身。我使用比较分析来研究男性睾丸激素表达峰值与性选择装饰品之间的关联。我还测试了男性和女性雄激素水平之间的遗传相关性。雄性中性选择性状的存在与雄性以及雌性中雄激素峰值水平的增加显著相关，并且雌性睾酮水平与雄性睾酮峰值滴度显著相关，尽管斜率仅略微<1。这表明，选择分离高男性和女性睾酮水平要么是弱或无效的。
Many sexually selected traits in male fishes are controlled by testosterone. Directional selection for male ornaments could theoretically increase male testosterone levels over evolutionary timescales, and when genetically correlated, female testosterone levels as well. Because of the negative fitness consequences of high testosterone, it is plausible that female choice for sexually selected traits in males results in decreased female reproductive fitness. I used comparative analysis to examine the association between male peak testosterone expression and sexually selected ornaments. I also tested for genetic correlation between male and female androgen levels. The presence of sexually selected traits in males was significantly correlated with increased peak androgen levels in males as well as females, and female testosterone levels were significantly correlated with male peak testosterone titers, although the slope was only marginally <1. This suggests that selection to decouple high male and female testosterone levels is either weak or otherwise ineffective.