Prey or predator: 0+ perch (Perca fluviatilis) in the trade-off between food and shelter
Prey or predator: 0+ perch (Perca fluviatilis) in the
trade-off between food and shelter
复制标题
猎物或捕食者：0 鲈鱼 (Perca Fluviatilis) 在食物和住所之间进行权衡
DOI：
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发表时间：
2006
影响因子：
1.4
通讯作者：
J. Borcherding
中科院分区：
文献类型：
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作者：
J. Borcherding
在它们生命的最初几个月里，0+种群可以分裂为生长缓慢的食浮游生物和快速增长的食鱼种群。然而，这两个群体都很容易受到食鱼性鱼类的捕食。进行了实验室实验，以测试0+鲈鱼作为鲤科动物捕食者的行为，以及在食物和庇护所之间的权衡，以免受捕食者的威胁。在觅食试验中，0+鲈鱼攻击鲤鱼的速度比鲤鱼快，植被阻碍了对鲤鱼的攻击。在第二个实验中，监测了捕食威胁下两个大小级别的0+鲈鱼的栖息地选择。总体而言，植被结构在0+栖息地的两个大小类别中都是首选的。当小鱼被提供给0+鲈鱼作为食物时，开阔的水域变得更有吸引力。栖息地利用试验的结果进一步表明，0+栖息地的两个大小队列的行为也可能不同，因为对于较大的栖息地，鱼类的可获得性变得比植被结构的遮蔽物更重要。
The 0+ cohort of perch can split into a slow-growing planktivorous and a fast-growing piscivorous cohort during their first months of life. Both cohorts are, however, vulnerable to predation by piscivorous fish. Laboratory experiments were performed to test the behavior of 0+ perch as a predator of cyprinids, and in the trade-off between food and shelter from the threat of predators. In the foraging trials, 0+ perch attacked bream faster than they did carp, and vegetation hampered the aggression against bream. In the second experiment, the habitat selection of two size classes of 0+ perch under the threat of predation was monitored. Overall, vegetation structures were preferred by both size classes of 0+ perch. When small fish were offered to the 0+ perch as food, the open water becomes more attractive. The results of the habitat use trials further show that the two size cohorts of 0+ perch may also differ in their behavior, in that the availability of fish as food becomes more important than the shelter of vegetation structures for the larger perch.