SEX-RATIO DETERMINATION AND WORKER REPRODUCTION IN THE SLAVE-MAKING ANT HARPAGOXENUS-SUBLAEVIS
SEX-RATIO DETERMINATION AND WORKER REPRODUCTION IN THE SLAVE-MAKING ANT HARPAGOXENUS-SUBLAEVIS
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DOI：
10.1007/bf00302946
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发表时间：
1988-01-01
影响因子：
2.3
通讯作者：
FRANKS, NR
中科院分区：
文献类型：
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作者：
BOURKE, AFG;VANDERHAVE, TM;FRANKS, NR
在S.E.在瑞典，皇后干重投资的平均比例为0.54。这一结果与0.75有显著差异，但与0.5没有显著差异，这与应用于奴隶制造者的性别比遗传相关性假设的预测相匹配，因为（正如本研究所证实的那样）女王的单一交配，整个种群的配偶竞争，以及相对较低的工人雄性生产水平。性投资似乎不受资源供应的影响。在相同的47个殖民地人口样本中，在每个无女王殖民地都发现了有生育能力的奴隶工人。所有殖民地的30%），并在58%的皇后正确的殖民地。生育工人发生在一个显着更高的频率在无女王殖民地（19.2%）比在queenright的（9.8%），证实无女王的条件下促进工人生育。可育和不育的工蜂体型相似。对49个蚁群的等位酶电泳分析表明：蚁后单独交配; SE）为0.735 ±。0.044）; 3）没有发生近亲繁殖; 4）蜂王和工蜂同胞没有遗传分化。工蜂在右蜂王群体中的雄性生产既没有被遗传数据证实，也没有被排除。然而，生产数据表明，无蜂王的工蚁生产了所有雄蚁的4.4%至21.6%。整体殖民地的生产力在很大程度上取决于奴隶数量，奴隶数量本身与奴隶工人的数量呈正相关。正如生活史模型所预测的那样，随着蜂群规模的增加，所有的工蜂突然转变为所有的有性繁殖。在母权殖民地，生育能力强的奴隶制造者并没有明显地降低殖民地的生产力。这样的工人出现在拥有大多数奴隶的女王权利殖民地，表明他们利用了精力过剩。在H.因此，sublaevis在个体行为层面的影响似乎大于在群体或种群层面的影响。
In a population of the monogynous slave-making ant Harpagoxenus sublaevis in S.E. Sweden, the mean proportion of dry weight investment in queens was 0.54. This result differed significantly from 0.75 but not from 0.5, matching the prediction from the genetic relatedness hypothesis of sex ratio applied to slave-makers, given (as confirmed by this study) single mating of queens, population-wide mate competition, and relatively low levels of worker male production. Sex investment appeared unaffected by resource availability. In the same 47 colony population sample, fertile slavemaker workers were found in every queenless colony (ca. 30% of all colonies), and in 58% of queen-right colonies. Fertile workers occurred at a significantly higher frequency in the queenless colonies (19.2%) than in the queenright ones (9.8%), confirming that queenless conditions promote worker fertility. Fertile and sterile workers were similar in size. Electrophoretic allozyme analysis of ants from 49 colonies showed that: 1) queens mated singly; 2) female nestmates were full sisters (their regression coefficient of relatedness (.+-. SE) was 0.735 .+-. 0.044); 3) inbreeding did not occur; 4) queen and worker siblings were not genetically differentiated. Worker male production in queen-right colonies was neither confirmed nor ruled out by the genetic data. However, production data indicated that queenless workers produced between 4.4 and 21.6% of all males. Overall colony productivity was largely determined by slave number, itself positively correlated with the number of slavemaker workers. There was an abrupt switch from all worker to all sexual production as colony size rose, as predicted by life history models. In queen-right colonies, fertile slave-makers did not discernibly reduce colony productivity. Such workers occured in queenright colonies with most slaves, suggesting they exploited energetic surpluses. Worker reproduction in H. sublaevis therefore appears to have greater influence at the level of individual behaviour than at colony or population level.