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首页> 外文期刊>Zoological Science >Effect of Body Coloration on Male-male Competition in a Cyprinid Fish Puntius titteya
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Effect of Body Coloration on Male-male Competition in a Cyprinid Fish Puntius titteya

机译：身体着色对一种胞质鱼Puntius Titteya的男性男性竞争的影响

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摘要

In some species, male traits are more exaggerated than female traits. To understand the evolution and maintenance of such male traits, it is important to clarify their function in contexts of both intra- and intersexual selection. However, information about the function of specific male traits in both male-male competition and female mate choice remains limited. Male Puntius titteya assume a bright red, carotenoid-based coloration over the whole body. A previous study revealed that females in this species prefer to mate with redder males. In the present study, we examined the function of male coloration in male-male competition under both white and green light conditions. Under white light, in which males could perceive red coloration, males with higher color saturation compared to their opponents became dominant. On the other hand, under green light, in which males could not accurately perceive red coloration, the effect of male coloration on male-male competition disappeared, and only male body size significantly influenced intermale competition, i.e., larger males were dominant. These results indicate that, under environments in which red coloration can be assessed by males, body coloration affects male-male competition. These findings suggest that carotenoid-based coloration in P. titteya males plays a key role in both intra- and intersexual selection.
机译：在某些物种中，男性特征比女性特征更夸张。要了解这种男性特征的进化和维护，重要的是要在内部和三分道选择的背景下澄清它们的功能。然而，关于男性竞争和女性伴侣选择特定男性特征的功能的信息仍然有限。男性Puntius Titteya在整个身体上呈现出明亮的红色类胡萝卜素的着色。先前的研究表明，这种物种中的女性更愿意与雄性的雄性交配。在本研究中，我们在白色和绿灯条件下检查了男性竞争中的男性着色的功能。在白光下，雄性可能会感知红色，与对手相比，具有更高色彩饱和度的雄性变得显着。另一方面，在绿灯下，雄性不能准确地看着红色，男性着色对男性竞争对手的影响消失，并且只有雄性体积显着影响了互相竞争，即较大的男性占主导地位。这些结果表明，在雄性评估红色的环境下，身体着色会影响男性男性竞争。这些研究结果表明，P.Titteya雄性中的类胡萝卜素的着色在内部和三分之一的选择中起着关键作用。

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