Productive performance of ewes mated in summer or autumn in Northern Paraná

Authors

  • Edson Luis de Azambuja Ribeiro Universidade Estadual de Londrina
  • Ivone Yurika Mizubuti Universidade Estadual de Londrina
  • Leandro das Dores Ferreira da Silva Universidade Estadual de Londrina
  • Marco Antonio da Rocha Universidade Estadual de Londrina
  • Rinaldo Masato Mori Universidade Estadual de Londrina

DOI:

https://doi.org/10.5433/1679-0359.2008v29n1p229

Keywords:

Breeding season, Fertility, Lambing, Reproduction, Sheep.

Abstract

This study had the objective of evaluating the productive performance of ewes mated in summer or in autumn, during four breeding seasons. A total of 233 ewes, from the breeds Corriedale (n=55), Hampshire Down (n=116), Ile de France (n=40) and Suffolk (n=22), with 2 to 8 teeth, were used. Lambing rate was greater (P<0.05) in ewes mated in autumn (89.1%) than in summer (79.7%). On the other hand, there were no differences (P>0.05) between ewes mated in autumn or summer for weaning, twin and lamb death rates, and for the production of kg of lambs per kg of mated ewe. Breed and age of ewe and year of evaluation influenced (P<0.05) the weights and weight gains of ewes and lambs, however, did not affect (P>0.05) the production of kg of lambs per kg of mated ewe. In the northern region of the Paraná state, ewes can be mated in summer or in autumn.

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Author Biographies

Edson Luis de Azambuja Ribeiro, Universidade Estadual de Londrina

Professor do Depto. de Zootecnia, Bolsista CNPq. Universidade Estadual de Londrina, CCA, Depto. de Zootecnia.

Ivone Yurika Mizubuti, Universidade Estadual de Londrina

Professor do Depto. de Zootecnia, Bolsista CNPq. Universidade Estadual de Londrina, CCA, Depto. de Zootecnia.

Leandro das Dores Ferreira da Silva, Universidade Estadual de Londrina

Professor do Depto. de Zootecnia. UEL, CCA, Depto. de Zootecnia. Londrina, PR.

Marco Antonio da Rocha, Universidade Estadual de Londrina

Professor do Depto. de Zootecnia. UEL, CCA, Depto. de Zootecnia. Londrina, PR.

Rinaldo Masato Mori, Universidade Estadual de Londrina

Aluno de Pós-graduação em Ciência Animal. Depto. de Zootecnia - UEL. Londrina, PR.

Published

2008-08-30

How to Cite

Ribeiro, E. L. de A., Mizubuti, I. Y., Silva, L. das D. F. da, Rocha, M. A. da, & Mori, R. M. (2008). Productive performance of ewes mated in summer or autumn in Northern Paraná. Semina: Ciências Agrárias, 29(1), 229–236. https://doi.org/10.5433/1679-0359.2008v29n1p229

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