How biases in sperm storage relate to sperm use during oviposition in female yellow dung flies

Marco Demont, Paul Ward, Wolf Blanckenhorn, Stefan Lüpold, Oliver Martin & Luc Bussière
Precise mechanisms underlying sperm storage and utilization are largely unknown, and data directly linking stored sperm to paternity remain scarce. We used competitive microsatellite PCR to study the effects of female morphology, copula duration and oviposition on the proportion of stored sperm provided by the second of two copulating males (S2) in Scathophaga stercoraria (Diptera: Scathophagidae), the classic model for sperm competition studies. We genotyped all offspring from potentially mixed-paternity clutches to establish the relationship...
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