An increase in habitat complexity reduces aggression and monopolization of food by zebra fish (Danio rerio)
An increase in habitat complexity reduces aggression and monopolization of food by zebra fish (Danio rerio)
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DOI：
10.1139/cjz-76-4-770
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发表时间：
1998-04-01
期刊：
影响因子：
--
通讯作者：
Grant, JWA
中科院分区：
文献类型：
--
作者：
Basquill, SP;Grant, JWA
我们测试的预测，增加栖息地的结构复杂性会导致减少侵略和资源的垄断。三组斑马鱼（Danio rerio）被允许竞争食物在一个复杂的栖息地与模拟植被，并在一个简单的栖息地没有植被。正如预测的那样，无论是侵略的优势鱼类（P = 0.050）和一组内的食物量的变异系数（P = 0.020），食物垄断的措施，在复杂的栖息地比在简单的。在这两种生境中，追逐竞争对手的鱼更频繁地吃更多的食物，但这种关系在简单的生境中比在复杂的生境中更强。我们的研究结果表明，侵略是不太有用的竞争模式，在栖息地具有更大的结构复杂性。操纵栖息地的结构复杂性可能是控制动物群体中的攻击强度和资源垄断的一种实用方法。
We tested the predictions that an increase in the structural complexity of a habitat causes both a decrease in aggression and the monopolization of resources. Groups of three zebra fish (Danio rerio) were allowed to compete for food in a complex habitat with simulated vegetation and in a simple habitat with no vegetation. As predicted, both the levels of aggression by the dominant fish (P = 0.050) and the coefficient of variation of the amount of food eaten within a group (P = 0.020), a measure of food monopolization, were lower in the complex habitat than in the simple one. Fish that chased competitors more frequently ate more food in both habitats, but the relationship was stronger in the simple than in the complex habitat. Our results suggest that aggression is less useful as a mode of competition in habitats with greater structural complexity. Manipulating the structural complexity of the habitat may be a practical way of controlling the intensity of aggression and resource monopolization in groups of animals.