Changes in social behavior of the male golden hamster accompanying photoperiodic changes in reproduction.
D000374:Aggression; D000818:Animals; D006224:Cricetinae; D006801:Humans; D008027:Light; D008297:Male; D008647:Mesocricetus; D009929:Organ Size; D012919:Social Behavior; D012930:Social Dominance; D013737:Testis / Q000502:physiology; D013997:Time Factors