Antipredator behaviour of 0+ year Perca fluviatilis: effect of vegetation density and turbidity
Antipredator behaviour of 0+ year Perca fluviatilis: effect of vegetation density and turbidity
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0年河鲈的反捕食行为：植被密度和浊度的影响
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
J. Mattila
中科院分区：
文献类型：
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作者：
M. Snickars;A. Sandström;J. Mattila
在这项研究中，植被密度和水体浊度的综合影响的猎物鱼，0+年鲈鱼fluviatilis，捕食风险（狗鱼，狗鱼）的栖息地利用进行了研究。植被的栖息地是整体首选的开放式栖息地在捕食者的存在。浊度的水平，并在较小程度上植被密度，但是，影响0+年鲈鱼的反应。使用的植被栖息地是较低的非常浑浊比在清澈和浑浊的条件下，这表明减少antipredator行为非常浑浊的水。植被密度对反捕食行为的影响只存在于清水中，其中使用的结构避难所减少，随着植被密度的增加。在浑浊和非常浑浊的水中没有观察到这种影响。结果表明，植被或生境复杂性的结构作用可能会减少增加浊度。所观察到的混浊度的掩蔽效应表明，在植被生境中的捕食者-猎物的相互作用比人们通常认为的要复杂得多。
In this study, the combined influence of vegetation density and water turbidity on habitat utilization of a prey fish, 0+ year perch Perca fluviatilis, under predation risk (pike, Esox lucius) was investigated. The vegetated habitat was overall preferred over the open habitat in the presence of a predator. The level of turbidity, and to a lesser extent vegetation density, however, influenced the response of 0+ year perch. The use of the vegetated habitat was lower in very turbid than in clear and turbid conditions, suggesting reduced antipredator behaviour in very turbid water. The effect of vegetation density on antipredator behaviour was only present in clear water, where the use of a structural refuge decreased with increasing vegetation density. No such effect was observed in turbid and very turbid water. The results showed that the structuring role of vegetation or habitat complexity may diminish with increased turbidity. The observed masking effect of turbidity suggests that predator-prey interactions in vegetated habitats are more complex than what has generally been thought.