• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Behavioral Ecology and Sociobiology >Displaying in the dark: light-dependent alternative mating tactics in the Alpine newt
【24h】

Displaying in the dark: light-dependent alternative mating tactics in the Alpine newt

机译：在黑暗中显示：高山new中依赖光的替代交配策略

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Environment plays a major role for determining the kind of courtship behaviours or alternative mating tactics employed, but the effect of physical variables on fitness has received little attention. The Alpine newt courts during both day and night times and exhibits a complex suite of behaviours involving olfactory, visual and tactile cues. Displaying in both dark and light conditions may increase the number of mating opportunities and alleviate predation risk, but the frequency and efficacy of the various tactics deployed may vary across light conditions, leading males to vary their use of these tactics across different light regimes. To test this hypothesis, we video-recorded sexual encounters at two light intensities in a controlled experimental design. When courting in the dark, males used comparatively more olfactory rather than visual displays. They also relied more on positive feedback from the female before releasing a spermatophore for her to pick up. The particular mix of tactics used under each light condition is likely to be adaptive because in the dark (1) visual communication is hampered, making olfactory displays possibly more effective and (2) males depositing spermatophores are more likely to lose fertilizations to competitors. Mating in light and dark conditions has similar reproductive payoffs, which shows that displaying in the dark is not detrimental and may even be advantageous if predation risk is reduced at night. These results confirm the importance of taking into account physical variables to understand the evolution of sexual communication in animals.
机译：环境在确定求爱行为或采用的其他交配策略的类型中起着主要作用，但是身体变量对适应性的影响却很少受到关注。高山new在白天和晚上都向法庭求偶，并且表现出一系列复杂的行为，涉及嗅觉，视觉和触觉提示。在黑暗和明亮的条件下展示都可能增加交配的机会并减轻掠食的风险，但是在各种光照条件下部署的各种策略的频率和功效可能会有所不同，导致雄性在不同光照条件下改变对这些策略的使用。为了验证这一假设，我们在受控的实验设计中以两种光照强度对性交进行了视频记录。当在黑暗中求爱时，雄性比嗅觉显示更多地使用嗅觉。他们还更多地依靠女性的积极反馈，然后释放精子供她吸收。在每种光照条件下使用的特殊战术组合可能具有适应性，因为在黑暗中（1）视觉交流受到阻碍，嗅觉显示可能会更有效；（2）放置精原细胞的男性更容易失去竞争者的受精能力。在黑暗和黑暗条件下交配具有相似的繁殖收益，这表明在黑暗中展示不会有害，并且如果在夜间降低捕食风险，甚至可能是有利的。这些结果证实了考虑物理变量以了解动物性交流的重要性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号