?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Resolution+of+agonistic+conflicts+in+dyads+of+acquainted+green+swordtails+(Xiphophorus+helleri%2C+Pisces%2C+Poeciliidae)%3A+A+game+with+perfect+information&rft.creator=Beaugrand%2C+Jacques+P.&rft.subject=Animal+Behavior&rft.subject=Behavioral+Biology&rft.subject=Ethology&rft.description=Conflict+resolution+of+familiar+opponents+was+compared+to+that+of+unfamiliar+ones+in+Xiphophorus+helleri+males.+Under+the+Familiar+condition%2C+the+two+males+which+met+had+settled+a+contest+against+each+other+in+a+previously+staged+encounter+in+another+aquarium.+Thus+one+opponent+was+the+previously+dominant+pair+member%2C+the+other+its+previously+subordinate.+Under+the+Unfamiliar+condition%2C+two+males+met+which+were+not+acquainted+with+each+other+but+had+independently+undergone+previous+experience+of+victory+or+defeat.+We+tested+the+hypothesis+that+familiar+pairs+would+conform+to+some+behaviourial+predictions+of+an+%C2%ABasymmetrical+game+with+perfect+information%C2%BB.+As+for+unfamiliar+pairs%2C+being+uninformed+of+asymmetries+at+a+contest+onset%2C+they+would+have+to+acquire+information+on+these+during+the+course+of+interaction+(%C2%ABasymmetrical+game+with+assessment%C2%BB)+or+alternatively+would+have+to+persist+for+a+certain+time+or+cost+(%C2%ABwar+of+attrition%C2%BB).+All+expectations+derived+from+an+%C2%ABasymmetrical+game+with+perfect+information%C2%BB+applied+to+familiar+pairs+but+not+to+unfamiliar+ones.+In+familiar+pairs%2C+all+prior+roles+were+reinstated+without+any+escalation.+Though+prior+winners+predominantly+defeated+prior+losers+under+both+conditions+of+cognizance%2C+this+difference+was+more+extreme+in+familiar+dyads+than+in+unfamiliar+ones.+This+suggests+that+the+respective+roles+were+less+clearly+identified+in+the+latter.+The+costs+of+conflicts+both+in+terms+of+aggressive+behaviours+used+and+in+time+were+also+higher+in+unfamiliar+pairs+than+in+familiar+ones.+Unacquainted+individuals+required+a+longer+period+to+assess+each+other.+In+addition%2C+they+had+to+rely+on+more+pugnacious+behaviour+to+settle+disputes+in+comparison+to+acquainted+pairs.+As+expected+also%2C+familiar+pairs+being+already+cognizant+of+initial+respective+roles+were+more+characterized+in+terms+of+the+behavioural+patterns+typical+of+each+of+these+roles.+Differences+between+ultimate+winners+and+losers+were+more+clear+in+acquainted+pairs%2C+and+appeared+earlier+during+conflict.+It+was+also+possible+earlier+during+contest+to+discriminate+and+to+predict+ultimate+winners+from+losers+of+acquainted+pairs+using+behavioural+interactions.+In+most+unacquainted+pairs%2C+ultimate+winners+could+be+forecasted+using+multivariate+discriminant+analyses%2C+mainly+by+their+offering+%C2%ABresistance%C2%BB+to+future+losers.+A+%C2%ABwar+of+attrition%C2%BB+did+not+fit+to+unacquainted+pairs.&rft.publisher=Elsevier&rft.date=1997&rft.type=Journal+(Paginated)&rft.type=PeerReviewed&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Fcogprints.org%2F1944%2F3%2Fbeaugrand-1997a-game1.pdf&rft.identifier=++Beaugrand%2C+Jacques+P.++(1997)+Resolution+of+agonistic+conflicts+in+dyads+of+acquainted+green+swordtails+(Xiphophorus+helleri%2C+Pisces%2C+Poeciliidae)%3A+A+game+with+perfect+information.++%5BJournal+(Paginated)%5D+++++&rft.relation=http%3A%2F%2Fcogprints.org%2F1944%2F