title: Territorial aggression of the rat to males castrated at various ages.
mesh_terms: D000367:Age Factors; D000374:Aggression / Q000502:physiology*; D000818:Animals; D002369:Castration; D005260:Female; D006801:Humans; D008297:Male; D051381:Rats / Q000502:physiology*; D012919:Social Behavior; D013731:Territoriality; D013739:Testosterone / Q000502:physiology
chemical_list: D013739:Testosterone