Male competition is disruptive to courtship in the Pacific blue-eye
Male competition is disruptive to courtship in the Pacific blue-eye
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雄性竞争会破坏太平洋蓝眼睛的求偶行为
DOI：
10.1111/j.0022-1112.2004.00452.x
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发表时间：
2004
影响因子：
2
通讯作者：
B. B. Wong
中科院分区：
文献类型：
--
作者：
B. B. Wong
本研究研究了竞争对太平洋蓝眼拟鮈鱼雄性求偶的影响，这种鱼类此前已被证明会利用求爱而非雄性战斗能力作为重要的择偶线索。当允许两只雄性自由互动（接触处理）时，针对刺激雌性的求爱回合最短，而当只有一只雄性（非互动）时，求爱回合最长。在将两只雄性中的一只限制在透明圆柱体（视觉）的试验中，求偶时间介于其他两种处理之间。视觉和接触治疗中的求爱过程不断受到干扰。与视觉治疗相比，接触治疗导致求爱中断的比例更高，而视觉治疗中攻击性互动的持续时间也更长，发生的频率也更高。在接触试验中，尽管雄性的求爱中断率相当，但占主导地位的雄性比下属求爱的时间更长。这些结果表明，雄性之间的竞争可能对适应性雌性选择产生重要影响，特别是在雌性寻求的利益与雄性战斗能力无关的情况下。
The present study examined the effects of competition on male courtship in the Pacific blue-eye Pseudomugil signifer, a species of fish where females have previously been shown to use courtship, but not male fighting prowess, as an important mate choice cue. Courtship bouts directed to a stimulus female were shortest when two males were allowed to freely interact (contact treatment) and longest when there was only one male (non-interaction). Courtship length in trials where one of two males was confined to a clear cylinder (visual) was intermediate between the other two treatments. Courtship in visual and contact treatments was constantly disrupted. The percentage of interrupted courtships was higher for the contact compared to visual treatment where aggressive interactions were also longer in duration and took place more frequently. Within contact trials, dominant males courted longer than subordinates despite both males experiencing comparable rates of courtship disruption. These results suggest that male-male competition can have important implications for adaptive female choice particularly in circumstances where the benefits being sought by females are unrelated to male fighting ability.