Influence of food abundance on competitive aggression in juvenile convict cichlids
Influence of food abundance on competitive aggression in juvenile convict cichlids
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DOI：
10.1006/anbe.2001.1891
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发表时间：
2002-02-01
期刊：
影响因子：
2.5
通讯作者：
Weir, LK
中科院分区：
文献类型：
--
作者：
Grant, JWA;Girard, IL;Weir, LK
最优性模型旨在解释发生的喂养领土预测的频率或强度的侵略将达到高峰，在中等水平的食物丰富。为了测试这一预测是否适用于短暂的补丁的食物的竞争，我们操纵的食物丰度在两个独立的实验（24和64倍，分别）在很宽的范围内的值，同时监测的侵略行为的少年罪犯慈鲷，Archocentrus nigrofasciatum，竞争的食物。在这两个实验中，侵略率低时，食物是稀缺的，增加食物丰富度的增加，并减少时，食物提供过剩。这种圆顶形的侵略模式造成的鱼之间的较高的遭遇率，部分由较高比例的遭遇导致侵略，当食物是在中间水平的丰富。我们的研究结果表明，定罪慈鲷显示行为的灵活性：在应对食物丰富的变化，他们似乎改变他们的可能性使用侵略时，遇到同种和他们愿意进入一个被占领的补丁。(C)2002年，动物行为研究协会。
Optimality models designed to explain the occurrence of feeding territoriality predict that the frequency or intensity of aggression will peak at intermediate levels of food abundance. To test whether this prediction applies to the competition for ephemeral patches of food, we manipulated food abundance over a broad range of values in two separate experiments (24- and 64-fold, respectively) while monitoring the aggressive behaviour of juvenile convict cichlids, Archocentrus nigrofasciatum, competing for the food. In both experiments, the rate of aggression was low when food was scarce, increased as food abundance increased, and decreased when food was provided in excess. This dome-shaped pattern of aggression was caused partly by higher encounter rates between fish and partly by a higher proportion of encounters resulting in aggression, when food was at intermediate levels of abundance. Our results suggest that convict cichlids display behavioural flexibility: in response to changes in food abundance, they appear to change both their likelihood of using aggression when encountering a conspecific and their willingness to enter an occupied patch. (C) 2002 The Association for the Study of Animal Behaviour.