title: [Modification of the effects of prior residence in xiphophorus (Pisces, Poeciliidae): the role of isolation and differences in size].
abstract: Laboratory experiments on pairs of male male of the genus Xiphophorus were carried out to test the hypothesis that the duration of a pre-experimental isolation period would modify the effects of prior residence on aggressive behaviour and dominance. Resident and intruder were isolated either both for 3 or both for 22 h (Exp. 1), or one for 3 and other other for 22 h (Exp. 2). Prior residence effects were only evident when the resident had been isolated for 3 h. Other connections between isolation conditions, reciprocal aggression and final dominance were also analysed, as was the influence of size differences between the opponents.
mesh_terms: D000374:Aggression; D000818:Animals; D001824:Body Constitution; D005399:Fishes; D006801:Humans; D008297:Male; D012930:Social Dominance; D012934:Social Isolation; D013731:Territoriality
vernacular_title: Modification des effets liés à la priorité de résidence chez Ziphophorus (Pisces, Poeciliidae): le rôle de l'isolement et des différences de taille