Abstract
The genus Calomys comprises a lot of species distributed throughout South America. The species C. callosus Rengger, 1830 occur in Brazil, been often used in laboratory experiments. This work involved a study of aggressive behavior and dominance, which are aspects related to hierarchy and territoriality, among C. callosus males kept in a laboratory. The establishment of a hierarchy was observed, with the dominant animals controlling the space, food and water, while the remaining animals were confined to a restricted space. The intensity of aggression and variations in the number of attacks declined over time as a result of the formation of the hierarchy. No wounds were observed, probably due to the ritualistic nature of the attacks.
Highlights
The genus Calomys comprises a lot of species distributed throughout South America
Callosus Rengger, 1830 occur in Brazil, been found in a large, C. expulsus, C. tener, C. tocantinsi, C. laucha and C. callosus and the latter are found in a large variety of habitats, including fields, pasturelands and forest edges
The dominant animals occupied most of the territory, while the other animals were confined to one of the individual cages
Summary
The genus Calomys comprises a lot of species distributed throughout South America. The species C. Estudo da hierarquia social e territorialidade em Calomys callosus The species C. callosus, has been used in laboratory experiments (Rodrigues and Ferro, 1998) and the effects of familiarity and privation on its behavior have been analyzed (Ades and Kolde, 1989 and Oliveira and Ades, 1993).
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