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首页> 外文期刊>Chemical Senses >Potential Chemosignals Associated with Male Identity in the Amphisbaenian Blanus cinereus
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Potential Chemosignals Associated with Male Identity in the Amphisbaenian Blanus cinereus

机译：与两栖类Blanus cinereus中的男性身份相关的潜在化学信号

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摘要

Pheromone-based chemosensory sex discrimination occurs in many reptiles, but the specific chemosignals responsible for this discrimination have been rarely identified. Chemoreception is especially important for amphisbaenians, a group of fossorial, almost blind, reptiles. We analyzed the role of semiochemicals produced by precloacal glands in intraspecific communication and chemosensory sex recognition of the amphisbaenian Blanus cinereus. We expected that sexual discrimination in amphisbaenians would be based on those chemicals that show intersexual differences in precloacal secretions, with squalene being the chemical that shows the greatest difference in relative abundance between sexes. Tongue-flick assays and behavioral responses to the scent of conspecifics confirmed that amphisbaenians are capable of detecting and discriminating between scent of conspecific males and females by using chemosensory cues alone. Differential responses of amphisbaenians to chemical compounds that are naturally found in precloacal secretions indicated that males can readily discriminate between different chemicals. Squalene, in particular, elicited in male amphisbaenians’ chemosensory and aggressive responses that were similar to those elicited by precloacal secretions. This result suggests that squalene alone allows male discrimination by male amphisbaenians. Furthermore, squalene might also signal dominance status or aggressiveness of a male amphisbaenian because higher concentrations of squalene elicited higher levels of aggression by males.
机译：在许多爬行动物中都发生了基于信息素的化学感应性别歧视，但是很少有人知道引起这种歧视的特定化学信号。化学感受对于两栖，一群几乎盲目的爬行动物的两栖类动物特别重要。我们分析了泄殖腔前腺产生的信息化学物质在种内交流和两栖类两栖动物Blanus cinereus的化学感觉性识别中的作用。我们预计，两栖动物中的性别歧视将基于那些显示出两性在泄殖腔前分泌物中存在差异的化学物质，而角鲨烯是在两性之间相对丰度差异最大的化学物质。轻弹试验和对同种异种气味的行为响应证实，仅通过化学感应提示，两栖动物能够检测和区分同种异性的雌性和雄性。孟菲斯人对泄殖腔前分泌物中天然存在的化合物的不同反应表明，男性可以轻易地区分不同的化学物质。角鲨烯尤其是在男性两栖类动物的化学感觉和攻击反应中引起的，类似于泄殖腔前分泌引起的反应。这一结果表明，角鲨烯本身就允许男性两性两栖类动物歧视。此外，角鲨烯还可能预示着雄性两栖动物的主导地位或侵略性，因为较高的角鲨烯浓度会引起雄性更高的侵略性。

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  • 来源
    《Chemical Senses》 |2009年第6期|p.479-486|共8页
  • 作者

    Pilar López and José Martín;

  • 作者单位

    Departamento de Ecología Evolutiva, Museo Nacional de Ciencias Naturales, Consejo Superior de Investigaciones Científicas (CSIC), José Gutiérrez Abascal 2, E-28006 Madrid, Spain;

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