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首页> 外文期刊>Proceedings of the Royal Society. Biological sciences >Host acceptance and sex allocation of Nasonia wasps in response to conspecifics and heterospecifics
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Host acceptance and sex allocation of Nasonia wasps in response to conspecifics and heterospecifics

机译：Nasonia黄蜂的寄主接受和性别分配，以应对种和异种

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摘要

Species recognition is an important aspect of an organism's biology. Here, we consider how parasitoidwasps vary their reproductive decisions when their offspring face intra- and interspecific competitionfor resources and, mates. We use host acceptance and sex ratio behaviour to test whether female Nasoniavitripennis and Nasonia longicornis discriminate between conspecifics and heterospecifics when ovipositing.We tested pairs of conspecific or heterospecific females ovipositing either simultaneously or sequentiallyon a single host, using strains varying in their recent history of sympatry. Both N. vitripennis andN longicornis rejected parasitized hosts more often than unparasitized hosts, although females were morelikely to superparasitize their own species in the sequential treatment. However, sex ratio behaviour didnot vary, suggesting similar responses towards conspecifics and heterospecifics. This contrasts withtheory predicting that heterospecifics should not influence sex ratios as their offspring do not influencelocal mate competition, where conspecifics would. These non-adaptive sex ratios reinforce the lack of adap-tive kin discrimination in N vitripennis and suggest a behavioural constraint. Discrimination between closelyrelated species is therefore context dependent in Nasonia. We suggest that isolating mechanisms associatedwith the speciation process have influenced behaviour to a greater extent than selection on sex ratios.
机译：物种识别是生物生物学的重要方面。在这里，我们考虑寄生蜂在其后代面临种内和种间对资源和配偶的竞争时如何改变其生殖决策。我们使用寄主接受和性别比行为来测试雌性Nasoniavitripennis和Nasonia longicornis产卵时是否区分同种和异种。我们测试了成对的同种或异种雌性同时或顺序在单个宿主上产卵，使用了其最近交感史不同的菌株。尽管女性在序贯治疗中更可能将自己的物种超寄生，但N. vitripennis和N longicornis都比未寄生的宿主更经常拒绝寄生的宿主。但是，性别比例行为没有变化，表明对同种和异种的反应相似。与理论预测相反的是，异种特性不应影响性别比例，因为异种特性的后代不会影响同种异型的本地配偶竞争。这些非适应性性别比加剧了网纹猪笼草缺乏适应性亲属歧视，并暗示了行为约束。因此，在Nasonia中，密切相关物种之间的区别取决于上下文。我们建议与物种形成过程相关的隔离机制对行为的影响大于对性别比的选择。

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