Despite the increasing interest in the use of intromittent male genitalia and coercive mating behaviour in poeciliids, detailed studies of the mating behaviour of most species in this family are lacking. We describe here the mating and aggressive behaviours of Brachyrhaphis olomina, and correlate them with the condition of the female’s ovum and embryos (immature, mature and pregnant). B. olomina performed a wide range of aggressive (sidle spread, tail beating, coordinate) and mating behaviours (approximation, touch, lateral display, touch-lateral display). Some behaviours (e.g. tail beating) are shared with other poeciliids, but two sexual behaviours (touch and lateral display) and one aggressive (coordinate) behaviour may be unique to B. olomina and were not reported in a previous study. Differences in male behaviour when paired with a female with mature ovum (more mating displays, no agonistic movements) suggest that males detect the female’s reproductive condition from some distance. The distinctive nature of mating behaviour in B. olomina highlights the importance of studying different species to have a better understanding of the evolution of mating and aggressive behaviours in poeciliids. Digital video images related to the article are available at http://www.momo-p.com/showdetail-e.php?movieid=momo170720bo01a, http://www.momo-p.com/showdetail-e.php?movieid=momo170720bo02a and http://www.momo-p.com/showdetail-e.php?movieid=momo170720bo03a.

中文翻译：

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Brachyrhaphis olomina (Cyprinodontiformes: Poeciliidae) 的交配和攻击行为

尽管对在 poeciliids 中使用内嵌雄性生殖器和强制交配行为越来越感兴趣，但缺乏对该科大多数物种交配行为的详细研究。我们在这里描述了 Brachyrhaphis olomina 的交配和攻击行为，并将它们与女性的卵子和胚胎（未成熟、成熟和怀孕）的状况相关联。B. olomina 进行了广泛的攻击性（侧展、甩尾、协调）和交配行为（接近、触摸、横向显示、触摸横向显示）。一些行为（例如拍尾）与其他 poeciliids 共享，但两种性行为（触摸和侧向展示）和一种攻击性（协调）行为可能是 B. olomina 独有的，并且在之前的研究中没有报告。当与具有成熟卵子的雌性配对时，雄性行为的差异（更多的交配表现，没有激动的动作）表明雄性可以从一定距离检测到雌性的生殖状况。B. olomina 交配行为的独特性质凸显了研究不同物种以更好地了解 poeciliids 交配和攻击行为进化的重要性。与文章相关的数字视频图像可在 http://www.momo-p.com/showdetail-e.php?movieid=momo170720bo01a、http://www.momo-p.com/showdetail-e.php? movieid=momo170720bo02a 和 http://www.momo-p.com/showdetail-e.php?movieid=momo170720bo03a。olomina 强调了研究不同物种以更好地了解 poeciliids 的交配和攻击行为进化的重要性。与文章相关的数字视频图像可在 http://www.momo-p.com/showdetail-e.php?movieid=momo170720bo01a、http://www.momo-p.com/showdetail-e.php? movieid=momo170720bo02a 和 http://www.momo-p.com/showdetail-e.php?movieid=momo170720bo03a。olomina 强调了研究不同物种以更好地了解 poeciliids 的交配和攻击行为进化的重要性。与文章相关的数字视频图像可在 http://www.momo-p.com/showdetail-e.php?movieid=momo170720bo01a、http://www.momo-p.com/showdetail-e.php? movieid=momo170720bo02a 和 http://www.momo-p.com/showdetail-e.php?movieid=momo170720bo03a。