Evolution: sperm ejection near and far.
In promiscuous fruit flies, the last male to inseminate a female has a fertilising advantage. Recent evidence indicates that this happens because females eject previously stored semen after a new copulation, revealing female bias in sperm use and the resulting battle of the sexes over fertilisation.
Pizzari
Tommaso
T
Evolution and Ecology Group, School of Biological Sciences, University of Leeds, Leeds LS2 9JT, UK. t.pizzari@leeds.ac.uk
D000818:Animals; D005075:Biological Evolution; D004331:Drosophila melanogaster / Q000502:physiology*; D005260:Female; D008297:Male; D012641:Selection, Genetic; D012661:Semen / Q000737:chemistry; D012726:Sexual Behavior, Animal / Q000502:physiology*; D013094:Spermatozoa / Q000502:physiology*