?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Relation+between+dominance+rank%2C+prior++agonistic+intensity+and+subsequent+aggressive+levels++in+winners+and+losers+of++dyads+of+male+Green+swordtail+fish+(Xiphophorus+helleri)&rft.creator=Goulet%2C+Claude&rft.creator=Beaugrand%2C+Jacques+P.&rft.subject=Animal+Behavior&rft.subject=Ethology&rft.description=Aggressive+scores+obtained+in+a+mirror+test++1h+before++an+encounter+were+found+to+be+a+good+predictor+of++victory+in+male+Xiphophorus+dyads+showing+less+than+5%25+size+differences.+Out+of+36+dyad+members+showing+higher++aggressive+scores+at+pre-test%2C+28++obtained+victory+in++the+subsequent+encounter.++It+was+found+that++future+winners+were+more+aggressive+than+future+losers+to+their+own+image+in+mirror+tests+before+their+encounter.+Initial+individual+aggressive+levels+in+mirror+tests+were+also+found+to+be++a+function+of+the+rank+the+individuals+occupied+in+their+home+hierarchies.++The+higher+the+rank%2C+the+higher+was+the+individual+aggressive+level+as+measured+by+mirror+pre-tests%2C+as+well+as+by+post-tests.+This+relationship+applied+to+future+winners%2C+as+well+as+to+future+losers.++The+level+of+aggression+reached+during+agonistic+encounter+was+not+a+function+of+the+social+ranks+the+opponents+occupied+in+their+home+hierarchies.+Males+in+dyads+composed+of+two+omegas+fought+as+fiercely+as+males+in+dyads+of+two+alphas+or+two+betas.+No+significant+relationship+was+noted+between+the+initial+individual+aggressive+scores+at+mirror+pre-test+and++the+levels+of+aggression+reached+during+encounters.++We+found+in+winners++the+existence+of+a+significant+correlation+between+the+aggressive+level+they+reached+during+agonistic+encounter+and+a+subsequent+increase+in+aggressive+levels+at+mirror+tests+1h+and+24h+after+victory.++The+more+intense+the+agonistic+encounter%2C+the+more+important++the+subsequent+increase+in+aggressive+level+in+winners%3B+an+increase+which+was+still+detectable+24h+after+victory.++However%2C+prior+alpha+winners+were+apparently+not+as+sensitive+as+prior+betas+and+prior+omegas+to+the+aggressive+level+reached+during+the+encounter++since+their+mirror+scores+obtained+after+victory+did+not+change+when+compared+to+their+baseline+at+pre-test.++After+defeat%2C+losers++did+not+show+any+significant+change+in++aggressive+scores+in+mirror+tests.+Moreover%2C+it+was+found+that+encounters+in+which+a+1h+resident+met+an+intruder+were+in+general+less+aggressive+than+encounters+between++two+intruders.++Experiential+effects+are+discussed+as+instances+of+learning+and+generalisation.++%0A%0A%0A&rft.date=2001-11&rft.type=Preprint&rft.type=PeerReviewed&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Fcogprints.org%2F1935%2F3%2Fgoulet-beaugrand-miroirs.pdf&rft.identifier=++Goulet%2C+Claude+and+Beaugrand%2C+Jacques+P.++(2001)+Relation+between+dominance+rank%2C+prior+agonistic+intensity+and+subsequent+aggressive+levels+in+winners+and+losers+of+dyads+of+male+Green+swordtail+fish+(Xiphophorus+helleri).++%5BPreprint%5D+++++&rft.relation=http%3A%2F%2Fcogprints.org%2F1935%2F