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首页> 外文期刊>Evolution: International Journal of Organic Evolution >Relationships between phenotype, mating behavior, and fitness of queens in the ant Lasius niger
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Relationships between phenotype, mating behavior, and fitness of queens in the ant Lasius niger

机译:蚂蚁Lasius niger的表型,交配行为和皇后适应度之间的关系

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摘要

Considerable attention has focused on why females of many species mate with several males. For social hymenopteran insects, efforts have primarily concentrated on determining whether multiple mating increases colony performance due to the increased genetic diversity. Most of these studies are correlative because it is difficult or impossible to experimentally mate queens in most species. Thus, the positive associations found between multiple paternity and colony fitness in some cases may not be due to direct effects of genetic diversity but could, in theory, arise from high-quality queens having more mates. Here we show that in the ant Lasius niger variation in the number of matings covaries with queen phenotype. Young queens that were heavier at the time of the mating flight were significantly more likely to mate with several males. As a result, heavier queens stored more sperm. The initial weight of queens was significantly associated with the probability of surviving mating flights during the two years of the study, with queens of intermediate weight having the highest across-year survival. Queen initial weight was also significantly and positively associated with the quantity of brood at the time of the first worker eclosion as well as colony productivity at the time of hibernation. By contrast, there was little evidence for a positive effect of the number of matings on colony performance when the effect of mate number and queen initial weight were considered simultaneously.
机译:相当多的注意力集中在为什么许多物种的雌性与几雄性交配的原因上。对于社交膜翅目昆虫,工作主要集中在确定由于遗传多样性的增加,多次交配是否能提高菌落性能。这些研究大多数是相关的,因为很难或不可能通过实验使大多数物种中的皇后交配。因此,在某些情况下发现的多重亲子关系与群体适应性之间的正相关可能不是由于遗传多样性的直接影响,而是在理论上可能来自具有更多配偶的优质女王。在这里,我们证明了在蚁群Lasius niger中,具有女王表型的交配协变量数量存在变异。交配时体重较重的年轻皇后很可能与几只雄性交配。结果,较重的女王/王后储存了更多的精子。在研究的两年中,皇后的初始体重与交配飞行存活的可能性显着相关,其中中等体重的皇后的全年存活率最高。女王的初始体重也与第一次工作被淘汰时的育雏数量以及冬眠时的菌落生产力显着正相关。相比之下,当同时考虑配偶数和蚁后初始体重的影响时,几乎没有证据表明交配数对菌落性能有积极影响。

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