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Author (up) Rönn, J.; Katvala, M.; Arnqvist, G doi  openurl
  Title Interspecific variation in ejaculate allocation and associated effects on female fitness in seed beetes Type Journal Article
  Year 2008 Publication Journal of Evolutionary Biology Abbreviated Journal J. Evol. Biol.  
  Volume 21 Issue 2 Pages 461 - 470  
  Keywords accessory gland products; Callosobruchus; cryptic female choice; nuptial gifts; post-mating sexual selection; sexual selection; sperm allocation; sperm competition; Zabrotes  
  Abstract When ejaculates are costly to produce, males are expected to allocate their ejaculate resources over successive matings in a manner that optimizes their reproductive success and this may have important consequences for their mates. In seed beetles (Coleoptera; Bruchidae), ejaculates vary in size across species from weighing less than 1%, up to as much as 8%, of male body weight. Ejaculates contain not only sperm but also a range of additional substances and females in some species gain benefits from receiving large ejaculates. Male ejaculate allocation may thus affect female fitness. Here, we first characterized the pattern of male ejaculate allocation over successive matings in seven-seed beetle species. We then assessed how this allocation affected female fitness in each species. Although females generally benefited from receiving large ejaculates, the interspecific variation observed both in ejaculate allocation patterns and in their effects on female fitness was remarkably large considering that the species studied are closely related. Our analyses suggest that variation in ejaculate composition is the key, both within and across species. We discuss possible causes for this variation and conclude that coevolution between male ejaculates and female utilization of ejaculate substances has apparently been rapid in this clade.  
  Address  
  Corporate Author Thesis  
  Publisher Blackwell Publishing Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number GA Highlands @ lblumke @ Serial 101  
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