...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ethology >Juvenile Collared Lizards Adjust Tail Display Frequency in Response to Variable Predatory Threat
【24h】

Juvenile Collared Lizards Adjust Tail Display Frequency in Response to Variable Predatory Threat

机译：幼领蜥蜴响应可变的掠夺性威胁而调整尾巴显示频率

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

Antipredator behavioral tactics have evolved in phylogenetically diverse animal clades and often involve prey initiating conspicuous display patterns when encountering potential predators. Using detailed behavioral observations in the field, we report the first description of conspicuous tail displays in juvenile collared lizards (Crotaphytus collaris), a species that does not have tail autotomy. When approached in the field, lizards gave four stereotypical displays involving the tail, suggesting that these might function as antipredator signals. To test this hypothesis, we compared the frequency of tail displays given by juveniles during approach experiments relative to control trials involving observation from afar. We then further manipulated the intensity (low threat, high threat) with which we threatened lizards by varying our angle of approach relative to the body-axis orientation of lizards resting on a perch sloping away from the observer. Our results show that juveniles consistently performed all four types of tail displays in response to our approaches, but subjects never displayed during non-threat control trials. Moreover, lizards were more likely to remain emergent and give tail displays when we approached them head-on with their bodies sloping away (low threat), but were more likely to take refuge when approached from the side and behind (high threat). The positive relationship between the frequency of display and risk level suggests that tail displays function to signal that juvenile lizards have detected potential predators, which may deter further pursuit. Together, our results provide the first account of visual displays involving the tail in collared lizards and suggest that these displays function to signal potential predators.
机译：在系统发育多样的动物进化进化中，反掠食者的行为策略已经演变，当遇到潜在的掠食者时，往往会引起猎物启动明显的展示方式。通过使用该领域的详细行为观察，我们报告了对幼年无领蜥蜴（Crotaphytus ringis）中没有明显尾巴的物种的显着尾巴展示的首次描述。当在野外接近时，蜥蜴给出了四个涉及尾巴的定型显示，表明它们可能充当反掠食者信号。为了验证这一假设，我们比较了青少年在进近实验中相对于远距离观察的对照试验中出现尾巴的频率。然后，我们通过改变相对于蜥蜴身体轴方向的接近角度来改变威胁蜥蜴的强度（低威胁，高威胁），蜥蜴的身体轴朝向远离观察者的倾斜。我们的研究结果表明，根据我们的方法，青少年始终执行所有四种类型的尾巴显示，但是在非威胁控制试验中从未显示过对象。此外，蜥蜴在身体倾斜时（面对低威胁）时，面对它们时，它们更有可能保持突现并显示尾巴，但是当从侧面和后面接近时，蜥蜴更有可能躲避（高度威胁）。展示频率与风险水平之间的正相关关系表明，尾巴展示功能表明幼蜥蜴已经发现了潜在的掠食者，这可能会阻止进一步的追捕。在一起，我们的结果提供了视觉上的显示，涉及颈蜥的尾巴，并建议这些显示功能，以信号潜在的掠食者。

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