A risk-balancing trade off between foraging rewards and predation hazard in a shoaling fish
A risk-balancing trade off between foraging rewards and predation hazard in a shoaling fish
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浅滩鱼觅食奖励和捕食危险之间的风险平衡权衡
DOI：
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发表时间：
1988
影响因子：
2.3
通讯作者：
J. Turner
中科院分区：
文献类型：
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作者：
T. Pitcher;S. H. Lang;J. Turner
在对照实验中，浅水欧洲米诺鱼在两个同等奖励的食物斑块上以相同的数量喂食，同样在不平等的斑块上喂食的数量反映了食物水平。对于相同的食物，小鱼没有在他们遇到模拟潜水鸟类捕食者的补丁中进食，而他们选择在这个风险补丁中进食时，它更有价值。为了同等的食物而避免危险，但为了更高的食物奖励而接受捕食者的风险，小鱼进行了风险平衡。
SummaryIn controlled experiments, shoaling European minnows fed in equal numbers on two equally-rewarded food patches, and likewise on unequal patches the numbers feeding reflected food levels. For equal food, minnows did not feed at the patch where they had encountered a simulated diving avian predator, whereas they chose to feed at this risky patch when it was more valuable. By avoiding hazard for equal food, but accepting predator risk for higher food rewards, the minnows performed a risk-balancing trade-off.