title: [Different types of sexual cycles in male European vipers].
abstract: Sexual cycles in European male vipers can be divided into two types, Spermatocytogenesis occurs in summer, spermiogenesis and mating in spring in three species. Three other species show more or less continuous spermatogenetic activity, but spermiogenesis occurs mostly in late summer and mating in both autumn and spring.
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D004777:Environment; D008297:Male; D012621:Seasons; D012726:Sexual Behavior, Animal / Q000502:physiology; D012911:Snakes / Q000502:physiology*; D013045:Species Specificity; D013090:Spermatocytes / Q000166:cytology; D013091:Spermatogenesis
vernacular_title: Les différents types de cycles sexuels des mâles chez les vipères européennes