Parental manipulation of offspring size in social groups: a test using paper wasps.
Parental manipulation of offspring size in social groups: a test using paper wasps.
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父母对社会群体中后代大小的操纵：使用纸黄蜂的测试。
DOI：
10.1007/s00265-019-2646-3
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发表时间：
2019
影响因子：
2.3
通讯作者：
Couchoux C
中科院分区：
文献类型：
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作者：
Couchoux C
当母亲主动为后代提供影响后代表型的资源时，母体效应尤其可能。在合作繁殖和群居的分类群中，父母有可能根据自己的利益有策略地操纵后代的表型。群居昆虫蜂王几乎总是比它们的工蜂后代要大，蜂王可以通过几种方式产生小的工蜂后代来获益。如果蜂王使用攻击性来统治或胁迫工蜂，那么产生小工蜂的蜂王可能会最大限度地减少来自后代的潜在冲突或竞争。此外，由于工蜂的数量和个体大小之间的权衡，蚁后可能会产生较小的工蜂来优化群体的工作努力。在这项研究中，我们调查了为什么原始社会纸蜂（polistes gallicis）的蜂后会限制工蜂的大小。我们通过在不同的巢间交叉培育蜂王，造成了工蜂大小的不匹配。然后，我们测试了工蜂的体型差异是否会影响工蜂的觅食和繁殖努力，或者群体中的攻击性程度。我们的一些研究结果与蜂王在策略上限制工蜂大小的观点是一致的：小工蜂的觅食能力并不差，因此生产更多的小工蜂可能会总体上提高蜂王的适应性。我们发现蚁后不太可能攻击大型工蚁，也许是因为试图胁迫大型工蚁的风险更大。然而，体型较大的工蜂并不会觅食更少，也不会在卵巢发育上投入更多，自身也不会更具攻击性。因此，总体而言，几乎没有证据表明蚁后通过生产更小的工人来限制冲突。在社会性动物中，父母可能会为了自己的利益而操纵后代的表型特征。在纸蜂（Polistes）中，第一代产出的后代比蜂王小，成为工蜂：它们不自己筑巢，而是留下来帮助母亲养育新的蜂王和雄蜂。我们调查了p。雄蜂蜂可以通过交叉培育产生较小的工蜂后代，从而使其与后代之间的体型不匹配。然后我们记录了觅食活动、繁殖努力和对巢穴的攻击。蜂王不太可能攻击体型较大的工蜂，但总的来说，基于体型的蜂王与工蜂冲突的证据有限。然而，由于小型工蚁的觅食能力并不差，因此产生更多的小型工蚁可能会优化群体的工作努力。
AbstractMaternal effects should be especially likely when mothers actively provision offspring with resources that influence offspring phenotype. In cooperatively breeding and eusocial taxa, there is potential for parents to strategically manipulate offspring phenotype in their own interests. Social insect queens are nearly always larger than their worker offspring, and queens could benefit by producing small daughter workers in several ways. If queens use aggression to dominate or coerce workers, a queen producing small workers might minimize potential conflict or competition from her offspring. In addition, because of the trade-off between the number of workers she is able to produce and their individual size, a queen may produce small workers to optimize colony work effort. In this study, we investigate why queens of the primitively eusocial paper waspPolistes gallicuslimit the size of their workers. We created queen–worker size mismatches by cross-fostering queens between nests. We then tested whether the queen–worker size difference affects worker foraging and reproductive effort, or the amount of aggression in the group. Some of our results were consistent with the idea that queens limit worker size strategically: small workers were no less successful foragers, so that producing a larger number of smaller workers may overall increase queen fitness. We found that queens were less likely to attack large workers, perhaps because attempting to coerce large workers is riskier. However, larger workers did not forage less, did not invest more in ovarian development, and were not more aggressive themselves. There was therefore little evidence overall that queens limit conflict by producing smaller workers.Significance statementIn social animals, parents might manipulate phenotypic traits of their offspring in their own interests. In paper wasps (Polistes), the first offspring produced are smaller than the queen and become workers: instead of founding their own nests, they stay and help their mother to rear new queens and males. We investigated whetherP. gallicusqueens could benefit by producing small daughter workers by using cross-fostering to create size mismatches between queens and their offspring. We then recorded foraging activity, reproductive effort, and aggression on nests. Queens were less likely to attack larger workers, but overall, there was limited evidence of size-based queen–worker conflict. However, because small workers were no less successful foragers, producing a larger number of smaller workers may optimize colony work effort.