Breeding performance of Wistar rats bred in two systems at the conventional Animal House of the Faculdade de Medicina-USP

  • Maria Eugenia Laurito Summa Universidade de São Paulo, Faculdade de Medicina, São Paulo, SP
  • Luci Ebisui Universidade de São Paulo, Faculdade de Medicina, São Paulo, SP
  • Junko Takano Osaka Universidade de São Paulo, Faculdade de Medicina, São Paulo, SP
  • Erasmo Magalhães Castro de Tolosa Universidade de São Paulo, Faculdade de Medicina, São Paulo, SP
Keywords: Laboratory animals breeding, Reproduction of rats

Abstract

The monogamous system employed in the Wistar rats colony bred at the Central Animal House CDTAEP) of the Faculdade de Medicina-USP showed insufficient for supplying the number of male rats required by the researchers. Aiming at the increase of production and to avoid females wastage, the harem cross-fostered system was introduced into the colony. In this study the  reproductive performance of the animals bred in each system was analyzed during a 17-month period. The results obtained indicated that the monogamous system had the best productivity and provided the young breeders for colony propagation. On the other hand, the harem system could be manipulated for male rats production. It was concluded that the simultaneous maintenance of the two breeding systems was convenient for supplying both laboratories and colony reposition requirements.

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Published
1990-12-02
How to Cite
Summa, M. E., Ebisui, L., Osaka, J., & Tolosa, E. (1990). Breeding performance of Wistar rats bred in two systems at the conventional Animal House of the Faculdade de Medicina-USP. Brazilian Journal of Veterinary Research and Animal Science, 27(2), 255-258. https://doi.org/10.11606/issn.0000-0000.272255-258
Section
ANIMAL REPRODUCTION

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