Diet affects ejaculate traits in a lizard with condition-dependent fertilization success

摘要: Sexually selected traits are often driven to costly extremes by persistent directional selection. Energy acquisition and allocation can therefore influence variation in subject both precopulatory postcopulatory sexual selection, though the later have received much less attention. We tested condition dependence of sperm morphology, count, fertilization success a promiscuous lizard (Anolis sagrei) 1) collecting samples from wild males that varied naturally body condition, 2) experimentally altering captive through dietary restriction, 3) analyzing genetic paternity data competitive mating trials between differed condition. In males, length midpiece decreased with Experimental food restriction production, head, increased midpiece, variance morphology within individuals. When restricted single copulation, on high-intake diets exhibited slight but nonsignificant advantage. Reanalysis previous experiment which high- low-condition were sequentially allowed copulate ad libitum for 1 week revealed significant bias favor high-condition males. controlling mean treatment effects proportion offspring sired phenotypes, multiple regression negative correlations head length, count. Collectively, our results suggest condition-dependent A. sagrei may be partially mediated underlying