Male guppies change courtship behaviour in response to their own quality relative to that of a rival male
Male guppies change courtship behaviour in response to their own quality relative to that of a rival male
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雄性孔雀鱼会根据自身相对于竞争对手的品质来改变求偶行为
DOI：
10.1016/j.anbehav.2016.05.022
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发表时间：
2016
期刊：
影响因子：
2.5
通讯作者：
E.
中科院分区：
文献类型：
--
作者：
Yoshikawa;T.;Ohkubo;Y.;Karino;K.;Hasegawa;E.
小孔雀鱼会根据自己相对于对手的外表改变求爱方式。优秀的雄性孔雀鱼不会停止求偶，不管对手是什么类型。劣等雄性孔雀鱼在对手表现优异时放弃求偶。劣等的雄性在有对手的情况下会把伴侣换成不那么受欢迎的雌性。人为区分的兄弟表现出相同的行为模式。与雌性配偶选择相比，雄性配偶选择在过去的二十年里一直是一个重要但次要的话题。在孔雀鱼（Poecilia reticulata）中，当雄鱼接近雌鱼时，当竞争对手出现在雌鱼旁边时，雄鱼就放弃了求爱；然而，男性的相对素质对这种行为变化的影响尚不清楚。我们在这里表明，雄性孔雀鱼只有在竞争对手的雄性在表型上更优越时才会放弃对雌性的接近。自然和人工诱导的颜色鲜艳的雄性即使在对手颜色鲜艳的情况下也会继续接近雌性，但自然和人工诱导的颜色暗淡的雄性在对手颜色鲜艳的情况下都会放弃接近雌性。雄性根据自己的外表而不是基因型来决定自己的行为，因为人工诱导的浅色和深色兄弟在行为上有所不同。我们的研究结果表明，雄性的择偶行为是精心调整的，以最大限度地提高被接近的雌性接受的可能性。
HighlightsMale guppies change courtship in response to their relative appearance to a rival.Superior male guppies do not stop courtship irrespective of type of rival.Inferior male guppies abandon courtship when a rival is phenotypically superior.Inferior males change partner to less preferred female in presence of a rival.Artificially differentiated brothers showed the same behavioural patterns.Compared with female mate choice, male mate choice has been an important but minor topic in the past two decades. In the guppy, Poecilia reticulata, a male approaching a female abandons his courtship when a rival male appears next to the focal female; however, the effect of the relative quality of the males on this behavioural change is unknown. We show here that male guppies abandon their approach to a female only when the rival male is phenotypically superior. Both natural and artificially induced brightly coloured males continued to approach a female even when the rival male was brightly coloured, but both natural and induced dull-coloured males abandoned their approach to a female when the rival was brightly coloured. Males decided their behaviours on the basis of their own appearance, not on their genotypes, because artificially induced brightly and dull-coloured brothers differed in their behaviour. Our results show that male mate choice behaviour is finely tuned to maximize the probability of acceptance by the approached female.