VIGILANCE, PREDATOR DETECTION AND THE PRESENCE OF SUPERNUMERARY MALES IN VERVET MONKEY TROOPS
VIGILANCE, PREDATOR DETECTION AND THE PRESENCE OF SUPERNUMERARY MALES IN VERVET MONKEY TROOPS
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DOI：
10.1016/s0003-3472(05)80104-6
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发表时间：
1992-03-01
期刊：
影响因子：
2.5
通讯作者：
HENZI, SP
中科院分区：
文献类型：
--
作者：
BALDELLOU, M;HENZI, SP
为了确定成年雄性是否为雌性提供服务，在这种情况下是反捕食者行为，以换取被纳入一个群体，一群自由活动的马尾猴，Cercopithecus atheiops，被观察了9个月。雄性比雌性更警惕，而且随着繁殖季节的临近，这种差异越来越大。男性更高的警觉性与他们在树梢上单独或暴露的时间比例更大有关。然而，雄性并不警惕，因为它们暴露在空气中，而是移动到这样的位置以便扫描周围环境。尽管如此，在探测捕食者方面，雄性并不比雌性更有效。排名最靠前的雄性是对捕食者最警惕和最积极的。从这些和其他数据中可以看出，男性的警觉是针对其他男性的，而不是被纳入的交换条件。虽然女性受益于这种警觉，但她们无法控制男性人数，因此，部队中有一些编外男性，他们很可能是其他人警觉的受益者。
To determine whether adult males provide females with a service, in this case anti-predator behaviour, in return for inclusion in a group a free-ranging troop of vervet monkeys,Cercopithecus aethiops, was observed for 9 months. Males were more vigilant than females and the discrepancy increased as the breeding season approached. Higher levels of vigilance by males were associated with their spending a greater proportion of time either isolated or exposed at the tops of trees. Males, however, were not vigilant because they were exposed but moved into such positions in order to scan the surroundings. Despite this, males were no more efficient than females at detecting predators. The top-ranking male was the most vigilant and active against predators. It is argued from these and other data that male vigilance is directed at other males and is not a quid pro quo for inclusion. Although females benefit from this vigilance they are not capable of controlling male numbers, and troops, as a consequence, contain a number of supernumerary males who may well be the beneficiaries of the vigilance of others.