title: Relation between the seasonal changes in aggression, plasma testosterone and the photoperiod in male rhesus monkeys.
mesh_terms: D000374:Aggression / Q000502:physiology*; D000375:Aging; D000818:Animals; D002369:Castration; D002940:Circadian Rhythm; D005260:Female; D006801:Humans; D008027:Light; D008251:Macaca / Q000502:physiology*; D008253:Macaca mulatta / Q000097:blood / Q000502:physiology*; D008297:Male; D012621:Seasons; D013739:Testosterone / Q000097:blood*
chemical_list: D013739:Testosterone