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首页> 外文期刊>Animal Cognition >Male chacma baboons (Papio hamadryas ursinus) discriminate loud call contests between rivals of different relative ranks
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Male chacma baboons (Papio hamadryas ursinus) discriminate loud call contests between rivals of different relative ranks

机译：雄性狒狒（Papio hamadryas ursinus）区分不同相对等级的竞争对手之间的大声比赛

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摘要

Males in multi-male groups of chacma baboons (Papio hamadryas ursinus) in Botswana compete for positions in a linear dominance hierarchy. Previous research suggests that males treat different categories of rivals differently; competitive displays between males of similar rank are more frequent and intense than those between disparately ranked males. Here we test whether males also respond differently to male-male interactions in which they are not directly involved, using playbacks of the loud 'wahoo' calls exchanged between competing males in aggressive displays. We played paired sequences of vocal contests between two adjacently ranked and two disparately ranked males to ten subjects, half ranking below the signalers in the call sequences and half above. Subjects who ranked above the two signalers showed stronger responses than lower-ranking Subjects. Higher-ranking subjects also responded more strongly to sequences involving disparately ranked, as opposed to adjacently ranked opponents, suggesting that they recognized those individuals' relative ranks. Strong responses to sequences between disparately ranked opponents might have occurred either because Such contests typically involve resources of high fitness value (defense of meat, estrous females or infants vulnerable to infanticide) or because they indicate a sudden change in one contestant's condition. In contrast, subjects who ranked lower than the signalers responded equally strongly to both types of sequences. These subjects may have been able to distinguish between the two categories of opponents but did not respond differently to them because they had little to lose or gain by a rank reversal between males that already ranked higher than they did.
机译：博茨瓦纳的多头雄性狒狒狒狒（Papio hamadryas ursinus）中的雄性竞争着线性优势等级中的位置。先前的研究表明，男性对待不同类别的竞争对手的方式有所不同。与排名不同的男性之间相比，同等级男性之间的竞争性展示更为频繁和激烈。在这里，我们使用激进的显示器中竞争雄性之间交换的响亮的“ wahoo”呼叫的回放，测试雄性是否也对不直接参与的雄性-雄性交互做出不同反应。我们在两个相邻排名和两个不同排名的男性之间以配对的顺序进行了声乐比赛，对十个对象进行了测试，其中一半在通话顺序中低于发讯员，另一半则高于发声者。排名高于这两个信号的受试者表现出比排名较低的受试者更强的反应。与相邻等级的对手相比，等级较高的受试者对等级不同的序列的反应也更强烈，表明他们认识到这些人的相对等级。在排名不同的对手之间可能会产生强烈的反应，原因可能是这种比赛通常涉及具有较高适应性的资源（肉类，发情的雌性或易受杀婴性影响的婴儿的防御能力），或者是因为它们表明一名选手的状况突然改变。相反，排名低于信号员的受试者对两种序列的反应同样强烈。这些受试者可能已经能够区分两种类型的对手，但是对他们的反应却没有不同，因为在排名已经高于他们的男性之间，他们的排名颠倒几乎没有损失或增加。

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