?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=An+experimental+model+of+aggressive+dominance+in+Xiphophorus+helleri+(Pisces%2C+Poeciliidae)&rft.creator=Beaugrand%2C+Jacques+P.&rft.creator=Zayan%2C+R.C.&rft.subject=Animal+Behavior&rft.subject=Behavioral+Biology&rft.subject=Ethology&rft.subject=Comparative+Psychology&rft.description=An+experimental+model+was+constructed+using+seven+postulates+derived+from+the++experimental++results+of+Zayan+(1974%2C+1975a%2Cb%2Cc%2C+1976).+The+model+specifies+the+relative+importance+of+several+asymmetries+in+predicting++aggressive+dominance+in+Xiphophorus+helleri.++These+asymmetries+concern+differences+between+opponents+with+respect+to%3A+prior+residence+in+the+tested+area+(versus++intrusion)%3B+immediate+social+experiences+of+dominance+or+submission%3B+social+isolation%3B+individual+familiarity+and+recognition.+The+predictions+of+the+general+model+were+checked+experimentally+and+confirmed%3B+a+multiple+orthogonal+regression+accounted+for+about+97%25+of+the+variance+in+our+experimental+results.+The+basic+experimental+results+serving+as+postulates+were+confirmed+and+could+be+generalized%3B+a+new+synthetic+and+predictive+model+was+formulated+concerning+the+determinants+of+aggressive+dominance+in+Xiphophorus+males.++The+following+empirical+generalisations+were+either+confirmed+or++disclosed+by+the+present+study+of+opponents+showing+very+small+size+differences%3A+G1%3A+The+dominance+propensity+is+significantly+higher+in+resident+individuals+than+in+intruders.+G2%3A+The+dominance+propensity+is+significantly+higher+in+previously+dominant+individuals+than+in+previously+submissive+ones.+G2+holds+true+for+dyadic+encounters+between+acquainted+as+well+as+between+unacquainted+pair%26%2364979%3Bmembers.+G3%3A+The+dominance+propensity+is+similar+in+previously+dominant+individuals+and+in+previously+isolated+ones.++G4%3A+The+dominance+propensity+is+significantly+higher+in+previously+isolated+individuals+than+in+previously+submissive+ones.+G5%3A++G2+overrides+G1++in+both+acquainted+and+unacquainted+opponents.+In+general+it+was+found+that+recent++agonistic+experience+(victory+or+defeat)+was+much+more+important+to+explain++future+issues+than+familiarity+with+the+meeting+place.+However%2C+negative+effects+of++recent+defeat+appeared+diminished+when+the+prior+loser+encountered+on+familiar+ground+a++prior+dominant+or+isolated++but++unacquainted+opponent.&rft.publisher=Elsevier&rft.date=1985&rft.type=Journal+(Paginated)&rft.type=PeerReviewed&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Fcogprints.org%2F1987%2F3%2Fbeaugrand-zayan-1985.pdf&rft.identifier=++Beaugrand%2C+Jacques+P.+and+Zayan%2C+R.C.++(1985)+An+experimental+model+of+aggressive+dominance+in+Xiphophorus+helleri+(Pisces%2C+Poeciliidae).++%5BJournal+(Paginated)%5D+++++&rft.relation=http%3A%2F%2Fcogprints.org%2F1987%2F