The sample consisted of 48 male Wistar rats (Rattus norvegicus) adult male, weighing between 230-280 g. After the adaptation period they were randomly distributed into two groups of 24: control group ...

Worden, A. N., edit. by, The UFAW Handbook on the Care and Management of Laboratory Animals (Baillière, Tindall and Cox, London, 1949).

1. Presently, the major thrust of my research is on the systematics, ecology, biogeography and conservation of the mammals of South America. For the past two decades I have worked throughout the ...