Unrelated helpers in a primitively eusocial wasp: is helping tailored towards direct fitness?

Unrelated helpers in a primitively eusocial wasp: is helping tailored towards direct fitness?
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DOI:
10.1371/journal.pone.0011997
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发表时间:
2010-08-06
期刊:
影响因子:
3.7
通讯作者:
Field J
Field J
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Leadbeater E;Carruthers JM;Green JP;van Heusden J;Field J

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纸蜂Polistes dominulus在社会昆虫中是独一无二的,因为近三分之一的共同创始人与他们帮助抚养后代的优势个体完全无关,但生殖偏斜很高。这些不相关的下属站在获得直接的健身通过巢遗传,提出了一个问题,他们的行为是否适应性定制最大化的继承前景。不同寻常的是,在这个物种中,丰富的理论和经验数据使我们能够预测不相关的下属应该如何表现。基于这些预测,在这里,我们比较帮助下属无关或相关的占主导地位的黄蜂在广泛的领域为基础的行为背景。我们没有发现不相关的助手和他们的相关同行之间的觅食努力,防御行为,侵略或继承等级的差异。我们的研究没有提供任何证据,在一些行为的情况下,不相关的下属的行为是适应性修改,以促进直接健身的利益。
The paper wasp Polistes dominulus is unique among the social insects in that nearly one-third of co-foundresses are completely unrelated to the dominant individual whose offspring they help to rear and yet reproductive skew is high. These unrelated subordinates stand to gain direct fitness through nest inheritance, raising the question of whether their behaviour is adaptively tailored towards maximizing inheritance prospects. Unusually, in this species, a wealth of theory and empirical data allows us to predict how unrelated subordinates should behave. Based on these predictions, here we compare helping in subordinates that are unrelated or related to the dominant wasp across an extensive range of field-based behavioural contexts. We find no differences in foraging effort, defense behaviour, aggression or inheritance rank between unrelated helpers and their related counterparts. Our study provides no evidence, across a number of behavioural scenarios, that the behaviour of unrelated subordinates is adaptively modified to promote direct fitness interests.
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