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Non-Visual Mate Choice Ability in a Cavefish (Poecilia mexicana) is not Mechanosensory

机译:穴居鱼(Poecilia mexicana)的非视觉伴侣选择能力不是机械感官。

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One of the most important decisions any female has to make is selecting a mate. In many animals, this involves a strong visual component, but in cave-dwelling fishes, mate preferences have to be exercised in darkness. In a cave-dwelling Poeciliid fish, the cave molly (Poecilia mexicana), visual mate choice is still possible because they have functional, albeit reduced eyes. In a previous laboratory study, it was documented that females prefer larger males in light and in darkness. In the present study, we investigated the role of the mechanosensory lateral line in this mate preference. We temporarily knocked out the lateral line using antibiotics. We found that even in the functional absence of the lateral line, females showed a clear preference for larger males, indicating that the lateral line is not crucial for mate choice. This points toward a strong role of chemical communication in cave molly mate choice.
机译:任何女性必须做出的最重要的决定之一就是选择伴侣。在许多动物中,这涉及很强的视觉成分,但在居住在洞穴中的鱼类中,必须在黑暗中行使配偶的偏爱。在居住在山洞中的Poeciliid鱼中,洞mol(Poecilia mexicana)仍然可以选择视觉伴侣,因为它们的眼睛虽然功能良好,但眼睛却很短。在先前的实验室研究中,有文献表明,雌性在光线和黑暗中都喜欢较大的雄性。在本研究中,我们调查了机械感觉侧向线在这种配偶偏好中的作用。我们暂时用抗生素打掉了侧线。我们发现,即使在功能上没有侧线的情况下,雌性也表现出明显的偏爱较大的雄性,这表明侧线对于选择配偶并不重要。这表明化学交流在选择洞穴莫利伴侣方面起着重要作用。

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