Mate-guarding behavior enhances male reproductive success via familiarization with mating partners in medaka fish.
Mate-guarding behavior enhances male reproductive success via familiarization with mating partners in medaka fish.
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DOI：
10.1186/s12983-016-0152-2
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发表时间：
2016
影响因子：
2.8
通讯作者：
Takeuchi H
中科院分区：
文献类型：
--
作者：
Yokoi S;Ansai S;Kinoshita M;Naruse K;Kamei Y;Young LJ;Okuyama T;Takeuchi H
雄-雄竞争和雌性交配偏好是影响个体适应度的主要性选择机制。然而，人们对男性之间的竞争如何影响女性的偏好仍然知之甚少。在实验室条件下，青鳉（Oryzias latipes）男性竞争的位置之间的竞争对手的男性和女性（配偶监护）在三元关系（男性，男性和女性）。此外，雌性更喜欢与视觉上熟悉的雄性交配。在本研究中，研究是否配偶守卫影响女性偏好通过视觉熟悉，我们建立了一个新的行为测试，同时量化视觉熟悉的焦点男性与女性和配偶守卫对竞争对手的男性。此外，我们调查的影响，熟悉男性生殖成功的三元关系。将三条鱼（雌性、雄性、雄性）分别放置在一个透明的三室水箱中，这使得中心的雄性（近雄性）比另一个雄性（远雄性）更接近雌性。野生型男性在中心的位置阻断了视觉熟悉的远男性的女性通过交配守卫。与此相反，放置一个精氨酸-催产素受体突变的男性，表现出配偶保护缺陷，在中心，允许保持接近女性，并没有阻止熟悉的远男性的女性。我们还表明，男性的生殖成功显着降低剥夺女性视觉熟悉的男性。我们的研究结果表明，至少在三元关系中，配偶守卫的优势，而不仅仅是接近，使男性获得熟悉的女性超过他们的竞争对手，这可能会提高女性的偏好占主导地位的男性。这些研究结果集中在青鳉的三元关系可能有助于我们理解的适应意义的持续配偶守卫，以及女性的偏好熟悉的配偶。本文的在线版本（doi：10.1186/s12983-016-0152-2）包含补充材料，可供授权用户使用。
Male-male competition and female mating preference are major mechanisms of sexual selection, which influences individual fitness. How male-male competition affects female preference, however, remains poorly understood. Under laboratory conditions, medaka (Oryzias latipes) males compete to position themselves between a rival male and the female (mate-guarding) in triadic relationships (male, male, and female). In addition, females prefer to mate with visually familiar males. In the present study, to examine whether mate-guarding affects female preference via visual familiarization, we established a novel behavioral test to simultaneously quantify visual familiarization of focal males with females and mate-guarding against rival males. In addition, we investigated the effect of familiarization on male reproductive success in triadic relationships. Three fish (female, male, male) were placed separately in a transparent three-chamber tank, which allowed the male in the center (near male) to maintain closer proximity to the female than the other male (far male). Placement of the wild-type male in the center blocked visual familiarization of the far male by the female via mate-guarding. In contrast, placement of an arginine-vasotocin receptor mutant male, which exhibits mate-guarding deficits, in the center, allowing for maintaining close proximity to the female, did not block familiarization of the far male by the female. We also demonstrated that the reproductive success of males was significantly decreased by depriving females visual familiarization with the males. Our findings indicated that, at least in triadic relationships, dominance in mate-guarding, not simply close proximity, allows males to gain familiarity with the female over their rivals, which may enhance female preference for the dominant male. These findings focusing on the triadic relationships of medaka may contribute to our understanding of the adaptive significance of persistent mate-guarding, as well as female preference for familiar mates. The online version of this article (doi:10.1186/s12983-016-0152-2) contains supplementary material, which is available to authorized users.