title: The influence of artificial and natural short photoperiods on male Syrian hamsters: reproductive effects.
mesh_terms: D000818:Animals; D006224:Cricetinae / Q000502:physiology*; D008027:Light; D008297:Male; D008647:Mesocricetus / Q000502:physiology*; D008954:Models, Biological; D010507:Periodicity; D012098:Reproduction; D012621:Seasons; D013696:Temperature