Hasegawa Eisuke
Department of Biology, Faculty of Science, Tokyo Metropolitan University, Minamiohsawa 1-1, Hachioji-si, Tokyo, 192-03, Japan.
Evolution. 1994 Aug;48(4):1121-1129. doi: 10.1111/j.1558-5646.1994.tb05299.x.
The relative power of queens and workers at controlling sex allocation in the ant Colobopsis nipponicus is investigated in this study. Results show that C. nipponicus completely satisfies Hamilton's assumptions concerning colony social structure: monogyny, monoandry, and no worker reproduction. A genetic survey of the population structure rejects possibilities of local mate competition, local resource enhancement, and local resource competition, which all can bias population-allocation ratios from 0.5. Although these factors are absent, the observed sex-allocation ratio (male investment/total sexual investment; 0.250 ± 0.027) is significantly biased toward females and is not different from the estimated optimal ratio for workers (0.252). Thus, it appears that workers are likely to win in conflicts over sex allocation with queens.
本研究调查了日本弓背蚁中蚁后和工蚁在控制性别分配方面的相对权力。结果表明，日本弓背蚁完全符合汉密尔顿关于蚁群社会结构的假设：一夫一妻制、一妻多夫制，且无工蚁繁殖。对种群结构的基因调查排除了本地配偶竞争、本地资源增强和本地资源竞争的可能性，这些因素都可能使种群分配比例偏离0.5。尽管不存在这些因素，但观察到的性别分配比例（雄性投资/总性投资；0.250±0.027）显著偏向雌性，且与工蚁的估计最佳比例（0.252）没有差异。因此，在与蚁后的性别分配冲突中，工蚁似乎可能获胜。
