通过与月光相匹配的背景进行夜间伪装
Juan J Negro1, Salvador Bará2, David Galadí-Enríquez3
1Estación Biológica de Doñana, Department of Ecology and Evolution, Consejo Superior de Investigaciones Científicas (CSIC), Sevilla E-41092, Spain.
概括
谷仓猫头在月亮照亮的夜晚可以进行夜间伪装. 它们的白色底部与月亮照亮的天空相匹配,通过保持在猎物检测门以下来帮助猎人.
科学领域:
- * 行为生态学
- * 感官生态学 感官生态学
- * 视觉科学 视觉科学
背景情况:
- * 伪装通常被研究为白天的适应.
- * 夜间伪装的机制,尤其是捕食鸟类的夜间伪装机制,尚不清楚.
- *背景匹配 (BM) 是一种关键的伪装策略,但其在夜间的有效性尚不清楚.
研究的目的:
- *分析鸟类捕食者可以在夜空下实现背景匹配 (BM) 的条件.
- * 为了研究夜间伪装的机械基础在谷仓猫头 (Tyto alba).
- *为了模拟谷仓猫头伪装在月亮照亮的天空背景下的可行性,用于狩猎动物.
主要方法:
- *在不同的月球条件下分析天空辐射同变异性和异变异性.
- *对动物猎物的对比检测值的建模 (老鼠M,棒和S).
- * 射线测量月光照亮的天空,地面和谷仓猫头的下部部分.
主要成果:
- *背景匹配在晴朗,月亮照亮的夜晚是可行的,这取决于月球的高度.
- * 带有白色底部的可以保持在小鼠M和棒的对比检测门以下.
- * S-圆检测值通常没有达到,提供进一步的隐藏.
结论:
- * 谷仓猫头的白色颜色是对月光照亮的天空进行伪装的适应.
- * 这为该物种的夜间伪装提供了一种机械解释.
- * 在特定的月亮照明条件下,可以实现夜间背景匹配.
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