Re-examining the selfish herd: are central fish safer?
Re-examining the selfish herd: are central fish safer?
复制标题
重新审视自私群体：中心鱼更安全吗？
DOI：
10.1016/s0003-3472(89)80143-5
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发表时间：
1989
期刊：
影响因子：
2.5
通讯作者：
J. Parrish
中科院分区：
文献类型：
--
作者：
J. Parrish
的风险（每头攻击率），占领离散的空间位置内的一所学校的25大西洋银鱼，Menidia menidia，攻击下的黑鲈鱼，Centropristis striata，进行了测定。在可用的情况下，掉队者比学校更频繁地受到攻击，并且与学校成员相比，他们遭受的风险要高得多。在学校内，中央银鱼遭受最多的攻击，并持续显着较高的风险比例，相比周边银鱼。这一发现与理论模型相矛盾，占据一个给定的位置内的动物聚集的相对利益，似乎是可以解释的捕食者的攻击模式和学校的规模。
The risk (per caput attack rate) of occupying discrete spatial locations within a school of 25 Atlantic silversides,Menidia menidia, under attack by a black seabass,Centropristis striata, was determined. When available, stragglers were attacked more frequently than the school and suffered a significantly higher risk in comparison to school members. Within the school, central silversides suffered the most attacks and sustained a significantly higher percentage of the risk, as compared to peripheral silversides. This finding contradicts theoretical models of the relative benefit of occupying a given location within an animal aggregation and seems to be explicable in terms of predator attack modes and school size.