title: Sperm activation in species with external fertilisation.
authors.affiliation: Stazione Zoologica, Naples, Italy.
authors.forename: E
authors.initials: E
authors.lastname: Tosti
mesh_terms: D000177:Acrosome / Q000502:physiology; D000818:Animals; D002633:Chemotaxis; D005260:Female; D005307:Fertilization in Vitro; D005399:Fishes; D008297:Male; D012617:Sea Urchins; D013084:Sperm-Ovum Interactions; D013094:Spermatozoa / Q000502:physiology*; D013215:Starfish