Informational constraints on optimal sex allocation in ants
Informational constraints on optimal sex allocation in ants
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DOI：
10.1073/pnas.1430283100
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发表时间：
2003-07-22
影响因子：
11.1
通讯作者：
Morgan, ED
中科院分区：
文献类型：
--
作者：
Boomsma, JJ;Nielsen, J;Morgan, ED
蚁群的工蚁根据蚁群中父亲的数量专门哺育雄性或雌性。这些分裂的性别比例增加了整体适应性，但工蜂如何评估其群体中父系的数量，以及它们的生殖决定在多大程度上受到信息缺乏的限制，这一点仍然未知。通过对多次交配后的工蜂表皮烃谱的定量变异分析，我们发现识别线索的遗传成分较低，性别比例偏向雄性的程度与烃谱的父系差异有关。因此，工蜂能够利用群体水平的亲缘不对称，但它们的包容性适合度受到非信息性识别线索的限制。这些结果与这样一种假设是一致的，即裙带关系表型的偶尔表达倾向于同父异母的姐妹，而不是同父异母的姐妹，这保持了对信息识别线索的选择。我们评估了如何使用包容性适应度理论来预测昆虫社会中特定亲缘结构的识别线索的数量和种类。
Workers of the ant Formica truncorum specialize in rearing females or males depending on the number of fathers of a colony. These split sex ratios increase inclusive fitness, but it has remained unknown how workers assess the number of patrilines in their colonies and to what extent their reproductive decisions are constrained by lack of information. By analysis of the quantitative variation in cuticular hydrocarbon profiles of workers of multiply mated queens, we show that the heritable component of recognition cues is low and that the extent of sex ratio biasing toward males is correlated with patriline differences in hydrocarbon profiles. Workers are thus able to capitalize on colony-level relatedness asymmetry, but their inclusive fitness is constrained by uninformative recognition cues. These results are consistent with the hypothesis that the occasional expression of nepotistic phenotypes favoring full-sisters over half-sisters maintains selection against informative recognition cues. We evaluate how inclusive fitness theory may be used to predict the number and kind of recognition cues in insect societies of a specific relatedness structure.