title: Sperm competition: discrimination isn't always bad.
abstract: Observing sperm in competition has been limited by our ability to discriminate between males' sperm. Recent work has overcome this obstacle, while another study reports on seminal fluid with very specific spermicidal activity, suggesting discrimination is easy for some.
authors.affiliation: Centre for Ecology and Conservation, University of Exeter, Cornwall Campus, Tremough, Penryn, Cornwall TR10 9EZ, UK.
authors.forename: Kensuke
authors.initials: K
authors.lastname: Okada
authors.forename: David J
authors.initials: DJ
authors.lastname: Hosken
mesh_terms: D000818:Animals; D005260:Female; D008297:Male; D012641:Selection, Genetic; D012661:Semen / Q000737:chemistry; D013089:Spermatocidal Agents / Q000737:chemistry / Q000378:metabolism; D013094:Spermatozoa / Q000166:cytology / Q000378:metabolism*
chemical_list: D013089:Spermatocidal Agents