title: [Season-related involution of spermatogenesis in the swan].
mesh_terms: D000818:Animals; D008297:Male; D011200:Poultry / Q000502:physiology*; D012621:Seasons; D012708:Sertoli Cells / Q000648:ultrastructure; D013045:Species Specificity; D013091:Spermatogenesis
vernacular_title: Saisonbedingte Involution der Spermatogenese beim Schwan