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找到一篇group size和vigilance的论文的摘要,有点像 名字叫Group Size and Vigilance in Pronghorns,不知道该放哪里,就放这儿了吧
Abstract The relationship between group size and vigilance in pronghorn antelopes (Antilocapra americana) was examined. As group size increased, the proportion of vigilant pronghorns decreased. Individuals in larger groups foraged longer than those in smaller groups. However, only solitary individuals foraged for significantly less time than individuals in all other group sizes. Solitary females with fawns present foraged for significantly less time than solitary males; solitary females without fawns present had intermediate foraging times. Peripheral individuals appeared to be more wary than those in the center of groups; the first two individuals to lift their heads were more likely to be on the periphery. Individuals lifted their heads at random with respect to one another. |
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