毒青及其贝蒂斯模仿者的检测能力取决于身体姿势和视角
Brendan L McEwen1, Justin Yeager2, Isaac Kinley1,3
1Department of Psychology, Neuroscience, & Behaviour, McMaster University, Hamilton, ON L8S 4L8, Canada.
概括
青的不完美模仿可能会平衡伪装与警告信号. 这种策略可以减少可检测性,同时保持模仿性,这表明适应性进化超出了简单的捕食者回避.
科学领域:
- 进化生物学是进化的生物学.
- 动物颜色动物的颜色.
- 行为生态学 行为生态学
背景情况:
- 异体信号警告掠食者对猎物的防御,但不完美的模仿引发了关于平衡可检测性和信号突出性的问题.
- 贝蒂斯模仿,缺乏防御,可能从密码中获益更多,这导致了不完美的模仿降低了检测能力的假设.
研究的目的:
- 为了调查青的不完美模仿是否会降低检测能力,同时保持模仿效果.
- 测试巴特斯模仿学中神秘模仿现象型的假设.
主要方法:
- 利用计算视觉建模来分析色彩模式.
- 对人类参与者进行了基于屏幕的检测试验,以评估猎物的检测能力.
- 研究了两种青:有毒的 * Ameerega 双语 * (模型) 和模仿的 * Allobates zaparo *.
主要成果:
- 模型和模仿物种都将伪装融入了他们的警告颜色中,根据视角和行为而有所不同.
- 模型和模仿者之间的检测能力差异不支持假设的神秘模仿现象型.
- 模仿者对空中观测者来说更容易检测,而对地面观测者来说,根据视角和颜色,检测能力有所不同.
结论:
- 不完美的模仿可能是一种适应性策略,平衡了伪装和信号功能,而不仅仅是由于感知或发育约束.
- 异构信号可以在多重选择压力下演变,超出简单的厌恶.
- 研究结果表明,警告色彩和模仿的复杂进化动态.
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