Mating between different species is ubiquitous in nature. While environmental conditions and population density have been shown to affect the occurrence of heterospecific matings, much less is known about the potential role of individual characteristics. Here, we examined the association between boldness and mate choice to con- and heterospecifics in a cyprinid fish ( Pseudaspius sachalinensis ) which naturally hybridizes with congeneric species. We found a positive correlation between risk-taking tendency in an emergence test and a preference for heterospecific females. This finding suggests that bolder males may prefer novel phenotypes or are likely to make a wrong choice for their mating partners.

中文翻译：

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更大胆的人是否更有可能选择异种配偶？鲤科鱼类试验

不同物种之间的交配在自然界中无处不在。虽然环境条件和种群密度已被证明会影响异种交配的发生，但对个体特征的潜在作用知之甚少。在这里，我们研究了与同类物种自然杂交的鲤科鱼类 (Pseudaspius sachalinensis) 的大胆和配偶选择与同种和异种特异性之间的关联。我们发现出现测试中的冒险倾向与对异种雌性的偏好之间存在正相关。这一发现表明，更大胆的雄性可能更喜欢新的表型，或者可能为他们的交配伙伴做出错误的选择。