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

Authors

  • 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

DOI:

https://doi.org/10.11606/issn.0000-0000.272255-258

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

Issue

Vol. 27 No. 2 (1990)

Section

ANIMAL REPRODUCTION

License

The journal content is authorized under the Creative Commons  BY-NC-SA  license (summary of the license: https://creativecommons.org/licenses/by-nc-sa/4.0 | full text of the license: https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode) 

How to Cite

1.
Summa MEL, Ebisui L, Osaka JT, Tolosa EMC de. Breeding performance of Wistar rats bred in two systems at the conventional Animal House of the Faculdade de Medicina-USP. Braz. J. Vet. Res. Anim. Sci. [Internet]. 1990 Dec. 2 [cited 2025 Jan. 17];27(2):255-8. Available from: https://revistas.usp.br/bjvras/article/view/51859