Fight tactics in wood ants: individuals in smaller groups fight harder but die faster
Fight tactics in wood ants: individuals in smaller groups fight harder but die faster
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DOI：
10.1098/rspb.2011.0062
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发表时间：
2011-11-07
影响因子：
4.7
通讯作者：
Briffa, Mark
中科院分区：
文献类型：
--
作者：
Batchelor, Tim P.;Briffa, Mark
当社会性动物参与群体间的竞争时，结果取决于群体的大小和个体的质量，它们共同决定了群体的资源持有潜力（“群体RHP”）。认为自己处于高RHP群体中的个体可能会获得动机增加并增加他们的攻击水平。或者，在较低的RHP组的个人可能会增加他们的侵略水平，试图克服RHP赤字。我们调查如何“组RHP”的影响竞争策略在红蚂蚁。较大的群体有较高的总激动指数，但人均激动指数最高的最小的群体，表明在较小的群体中的个人争取更难。激动指数受相对平均质量、焦点组大小、对手组大小和对手组激动指数的影响。焦点组摩擦率下降焦点组相对激动指数的增加，有一个强大的负面影响的相对平均质量。当对手群体数量庞大且由大型个体组成时，获得了最高的焦点损耗率。因此，F. rufa似乎随着群体RHP、群体大小和群体成员的个体属性这两个方面而变化，这表明关于这些的信息对战斗蚂蚁是可用的。
When social animals engage in inter-group contests, the outcome is determined by group sizes and individual masses, which together determine group resource-holding potential ('group RHP'). Individuals that perceive themselves as being in a group with high RHP may receive a motivational increase and increase their aggression levels. Alternatively, individuals in lower RHP groups may increase their aggression levels in an attempt to overcome the RHP deficit. We investigate how 'group RHP' influences agonistic tactics in red wood ants Formica rufa. Larger groups had higher total agonistic indices, but per capita agonistic indices were highest in the smallest groups, indicating that individuals in smaller groups fought harder. Agonistic indices were influenced by relative mean mass, focal group size, opponent group size and opponent group agonistic index. Focal group attrition rates decreased as focal group relative agonistic indices increased and there was a strong negative influence of relative mean mass. The highest focal attrition rates were received when opponent groups were numerically large and composed of large individuals. Thus, fight tactics in F. rufa seem to vary with both aspects of group RHP, group size and the individual attributes of group members, indicating that information on these are available to fighting ants.