The effect of group size on risk taking and social conformity in Eurasian perch

The effect of group size on risk taking and social conformity in Eurasian perch
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群体规模对欧亚鲈鱼的冒险行为和社会整合的影响

DOI:
10.1111/j.1600-0633.2011.00506.x
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发表时间:
2011
影响因子:
1.8
通讯作者:
Magnhagen
Magnhagen
中科院分区:
农林科学3区
文献类型:
--
作者:
Hellström;Heynen;Oosten;Borcherding;Magnhagen

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群体的规模会影响其成员的风险和竞争环境,也会影响成员之间的社会动态。随着群体规模的增加,个体捕食风险可能会通过风险稀释、早期捕食者发现和捕食者混淆等机制降低(Krause & Ruxton 2002)。鱼类能够准确评估其被捕食风险,并以适应性方式进行风险交易(Kelly 2008)。随着群体规模的增加,鱼类可能会分配更多的时间来进行潜在危险的健身增加行为,例如觅食。这种风险平衡的例子已经在鲤科动物中得到了体现,其中米诺鱼的个体
The size of a group can influence the risk and competitive environment for its members, as well as affect the social dynamic among members. As group size increases, individual predation risk may decrease through mechanisms such as risk dilution, earlier predator detection and predator confusion (Krause & Ruxton 2002). Fish are able to make accurate assessments of their risk of predation and to trade risk in an adaptive way (Kelly 2008). As group size increases, fish may hence be expected to allocate more time to potentially risky fitness-increasing behaviour, such as foraging. Examples of such risk balancing have been shown in cyprinids, in which individuals of minnows
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