The bases of aggression in animals.
D000374:Aggression; D000818:Animals; D001522:Behavior, Animal; D001717:Birds; D004285:Dogs; D005399:Fishes; D005639:Frustration; D006801:Humans; D006815:Hunger; D008960:Models, Psychological; D010146:Pain; D051381:Rats; D012054:Reinforcement, Psychology; D013731:Territoriality; D013997:Time Factors