Sperm limitation affects sex allocation in a parasitoid wasp Nasonia vitripennis
精子限制在 parasitoid 黄蜂 Nasonia vitripennis 影响性分配作者机构：Institut de Recherche sur la Biologie de I'lnsecteUMR 7261 CNRS - Universite de ToursFaculte des Sciences et TechniquesParc GrandmontToursFrance
出 版 物：《Insect Science》 (昆虫科学（英文版）)
年 卷 期：2019年第26卷第5期
页 面：853-862页
核心收录：
学科分类：0710[理学-生物学] 07[理学] 09[农学]
基 金：support of the Fertili Wasp of the French National Research Agency (ANR)
主 题：heat stress multiple mating offspring production dynamic sex ratio sperm stock sperm use
摘 要：Insect reproduction is influenced by various external factors including temperature, a well-studied constraint. We investigated to what extent different levels of sperm limitation of males exposed to different heat stresses (34 and 36℃) afFect fem ales offspring production and sex allocation in Nasonia vitripennis. In this haplodiploid parasitoid wasp attacking different species of pest flies, we investigated the effect of the quantity of sperm females received and stored in their spermatheca on their sperm use decisions, hence sex allocation, over successive ovipositions. In particular, we compared the sex allocation of females presenting three levels of sperm limitation (i.e.,mated with control, 34 ℃ heat-stressed or 36℃heat-stressed males) on each host they parasitized. To disentangle the potential reduction of sperm quality after a heat stress exposure from that of sperm quantity, we also explored the clutch size and sex ratio produced by fem ales that were partially sperm limited after copulating with multiply mated males. Independently of their sperm numbers, all types of fem ales produced a similar total number of offspring, but the more limited ones had fewer daughters. Sperm limitation further affected the distribution of daughters production across *** addition to constraints acting on female physiology, male fertility should therefore be considered in studies measuring reproductive outputs of insects submitted to heat stresses.
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