Mating preferences, sexual selection and patterns of cladogenesis in ray‐finned fishes
Mating preferences, sexual selection and patterns of cladogenesis in ray‐finned fishes
复制标题
射线鳍鱼的交配偏好、性选择和分支发生模式
DOI：
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发表时间：
2007
影响因子：
2.1
通讯作者：
J. Mank
中科院分区：
文献类型：
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作者：
J. Mank
进化论预测，当出现的交配偏好导致生殖隔离和物种形成时，性选择可能会增加分类多样性。这一理论被用来解释鳍状鱼类（尤其是慈鲷）的多样性模式，但这一理论尚未在鱼类中得到比较检验。此外，一些其他不相关的因素也被确定为分支发生的促进因素，因此性别选择在多样化中有多重要尚不清楚。使用姐妹进化分析，我测试了放光鳍鱼的性选择性状的存在与分类多样性之间的关系，放光鳍鱼是一个在交配偏好和相关性选择性状方面表现出大量多样性的大进化支。在所有已确定的姐妹科中，在表现出性选择特征的物种比例不同的情况下，性选择与多样性的增加相关，并且这种关联在所有姐妹分支中都是显著的（P = 0.02）。这表明，当性选择存在时，它是鳐鱼多样化的一个重要驱动力，并为交配偏好和加速枝发生之间的理论联系提供了进一步的经验支持。
Evolutionary theory predicts that sexual selection may increase taxonomic diversity when emergent mating preferences result in reproductive isolation and therefore speciation. This theory has been invoked to explain patterns of diversity in ray‐finned fishes (most notably in the cichlids), but the theory has not been tested comparatively in fish. Additionally, several other unrelated factors have been identified as promoters of cladogenesis, so it is unclear how important sexual selection might be in diversification. Using sister‐clade analysis, I tested the relationship between the presence of sexually selected traits and taxonomic diversification in actinopterygiian fishes, a large clade that shows substantial diversity in mating preferences and related sexually selected traits. In all identified sister‐families that differed with regard to the proportion of species manifesting sexually selected traits, sexual selection was correlated with increased diversification, and this association was significant across all sister clades (P = 0.02). This suggests that sexual selection, when present, is a substantial driver of diversification in the ray‐finned fishes, and lends further empirical support to the theoretical link between mating preferences and accelerated cladogenesis.