The adjustment of Calomys callosus (Rodentia, Cricetidae) to food deprivation

Ades, César; Kolde, Renate Edla

doi:10.1590/s0101-81751989000200005

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“…These animals are active principally at night and in the early morning (Nowak, 1991). 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 Kolde, 1989 andOliveira andAdes, 1993). In this study, the territorial behavior and the formation of hierarchies among C. callosus were observed in a laboratory.…”

Section: Introductionmentioning

confidence: 99%

Study of the social hierarchy and territoriality of Calomys callosus Rengger, 1830 (Rodentia: Cricetidae)

Póvoa

Brandeburgo

2007

Braz. J. Biol.

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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.Keywords: social hierarchy, territoriality, Calomys callosus. Estudo da hierarquia social e territorialidade em Calomys callosusResumo O genêro Calomys inclui várias espécies encontradas na América do Sul. A espécie C. callosus Rengger, 1830 ocorre no Brasil, sendo freqüentemente utilizada em experimentos de laboratório. Neste trabalho foram estudados, em machos mantidos em laboratório, o comportamento agressivo e a dominância, aspectos relacionados à hierarquia e territorialidade. Foi observado o estabelecimento de hierarquia, com os animais dominantes controlando o espaço, o alimento e a água, ficando os demais confinados em um espaço restrito. A intensidade das agressões e as variações no número de ataques diminuiram com o tempo, uma conseqüência da formação de hierarquia. Não foram observados ferimentos, devido provavelmente à ritualização dos ataques.Palavras-chave: hierarquia social, territorialidade, Calomys callosus.

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Section: Introductionmentioning

confidence: 99%