Relations entre territoire et comportement agressif chez Periophthalmus sobrinus Eggert (Pisces, Periophthalmidae) au Laboratoire et en milieu naturel

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Abstract
This study was carried out in the laboratory on experimental groups of adult Mudskippers of both sexes; also natural populations were observed in mangrove swamps along the west coast of Madagascar. This paper deals mainly with the various aggressive postures and their role in the establishment and defense territories, the variations of aggression in an experimental group and, in the field, according to the tide movements. The hierarchial organization in the group of Mudskippers, the emergence of displacement activities and vacuum activities, the structure and dimensions of territories have also been studied.