Large- and small-size advantages in sneaking behaviour in the dusky frillgoby Bathygobius fuscus
Large- and small-size advantages in sneaking behaviour in the dusky frillgoby Bathygobius fuscus
复制标题
暗色褶边虾虎鱼潜行行为中大体型和小体型的优势
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
Y. Matsumoto
中科院分区：
文献类型：
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作者：
T. Takegaki;T. Kaneko;Y. Matsumoto
潜行策略是一种涉及精子竞争的雄性替代性生殖策略，由于其隐蔽性而被小个体普遍采用。然而，当运动鞋之间发生卵子受精的竞争时，大尺寸具有优势。在这里，我们认为，大型和小型的优势，运动鞋男性都存在于同一物种。大运动鞋男性的深色褶边虎鱼Bathygobius fuscus表现出较高的成功率入侵产卵的巢穴，因为他们的优势，在运动鞋男性之间的竞争，保持一个合适的位置潜行，而小运动鞋很少有机会潜行。然而，小运动鞋男性能够留在巢中的时间比大运动鞋男性时，他们成功地潜入。这意味着他们的父亲身份可能会增加。这些特定大小的行为优势的研究结果可能是重要的，在考虑的大小相关的生殖性状的演变。
Sneaking tactic, a male alternative reproductive tactic involving sperm competition, is generally adopted by small individuals because of its inconspicuousness. However, large size has an advantage when competition occurs between sneakers for fertilization of eggs. Here, we suggest that both large- and small-size advantages of sneaker males are present within the same species. Large sneaker males of the dusky frillgoby Bathygobius fuscus showed a high success rate in intruding into spawning nests because of their advantage in competition among sneaker males in keeping a suitable position to sneak, whereas small sneakers had few chances to sneak. However, small sneaker males were able to stay in the nests longer than large sneaker males when they succeeded in sneak intrusion. This suggests the possibility of an increase in their paternity. The findings of these size-specific behavioural advantages may be important in considering the evolution of size-related reproductive traits.