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The ontogeny of agonistic behaviour in the blue gourami, Trichogaster trichopterus (Pisces,Anabantoidei)
Authors:Christopher P Tooker  Rudolph J Miller
Institution:School of Biological Sciences, Oklahoma State University, Stillwater, Oklahoma 74074 USA
Abstract:The development of agonistic behaviour in the blue gourami, Trichogaster trichopterus, was studied from hatching to four months of age. Larval motor patterns appear first as simple, uncoordinated, and irregular movements and gradually become regular and well coordinated, forming integrated complex patterns, such as swimming, surfacing, and feeding. Most motor patterns used in agonistic interactions are first exhibited in non-social contexts. Initial interactions between young fish consist of Approach and investigation in a feeding context, in some cases followed by nibbling, Biting, and Chasing by one fish. Later, initial Approaches are separated from Biting and Chasing by Lateral Displays, circling, Tail Beating, and Fin Tugging, and by Appeasement behaviour that inhibits Chasing and Biting by the opponent.Agonistic behaviour of socially isolated fish, when paired in dyadic encounters as adults, indicates that the role of social experience as an integrator and regulator of social behaviour may change progressively during development and become more important as ontogeny proceeds.
Keywords:Reprints are available on request from R  J  Miller  
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