Sexual dimorphism, mating systems, and nuptial gifts in two Asian fireflies (Coleoptera: Lampyridae)
Sexual dimorphism, mating systems, and nuptial gifts in two Asian fireflies (Coleoptera: Lampyridae)
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两种亚洲萤火虫的性别二态性、交配系统和结婚礼物（鞘翅目：萤科）
DOI：
10.1016/j.jinsphys.2012.09.001
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发表时间：
2012-11-01
影响因子：
2.2
通讯作者：
Lewis, Sara M.
中科院分区：
文献类型：
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作者：
Fu, Xinhua;South, Adam;Lewis, Sara M.
许多昆虫类群表现出明显的性别二态性，其中雌性缺乏功能性翅膀，因此无法飞行。在萤火虫中，雌性飞行能力的丧失与雄性产生精囊结婚礼物有关，而雌性萤火虫不会飞的物种也缺乏礼物产生。在这项研究中，我们通过检查两种亚洲萤火虫（性单态 Aquatica ficta (Luciolinae) 和二态性 Pyrocoelia pectoralis (Lampyrinae)）的生殖生态学，进一步研究了性二态性和结婚礼物之间的关系。我们描述了 P. pectoralis 雄性和雌性的生殖解剖结构，以及 A. ficta 精囊转移的时间过程。通过一系列交配实验，我们确定了交配次数对雌性繁殖力、卵孵化成功率和雌性寿命的影响。人们发现，产生精囊的 A. ficta 是单性的，并且由于单次交配，雌性的寿命延长了一倍。研究发现胸大鲵缺乏精囊，但雌性是一妻多夫，并且随着交配次数的增加，繁殖力和卵孵化成功率都会增加。这些结果与北美萤火虫物种已知的模式相矛盾，并提供了对雄性衍生物质在交配系统中的作用的深入了解。 (C) 2012 Elsevier Ltd. 保留所有权利。
Many insect taxa show conspicuous sexual dimorphism in which females lack functional wings and are therefore incapable of flight. In fireflies, this loss of female flight is correlated with male production of spermatophore nuptial gifts, with species with flightless females also lacking gift production. In this study we further examined the relationship between sexual dimorphism and nuptial gifts by examining the reproductive ecology of two Asian fireflies, the sexually monomorphic Aquatica ficta (Luciolinae) and dimorphic Pyrocoelia pectoralis (Lampyrinae). We describe the reproductive anatomy of P. pectoralis males and females, and the time course of A. ficta spermatophore transfer. Through a series of mating experiments, we determined the effect of the number of matings on female fecundity, egg hatching success and female lifespan. The spermatophore-producing A. ficta was found to be monandrous, and female lifespan doubled as a result of that single mating. P. pectoralis was found to lack spermatophores but females were polyandrous and fecundity and egg hatching success both increased with additional matings. These results contradict patterns known from North American firefly species and provide insight into the role of male-derived substances in mating systems. (C) 2012 Elsevier Ltd. All rights reserved.