Comparative reproductive rates using artificial insemination and natural mating under seasonal influences in swine

Authors

  • Pedro Henrique Candini Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, São Paulo, SP
  • Carlos Henrique Cabral Viana Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, São Paulo, SP
  • Ed Hoffman Madureira Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, São Paulo, SP
  • Rubens Paes de Arruda Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, São Paulo, SP
  • Eneiva Carla Carvalho Celeghini Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, São Paulo, SP
  • Mayra Elena Ortiz D’Avila Assumpção Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, São Paulo, SP
  • Pedro Paulo Gimenes Gusmões Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, São Paulo, SP
  • Renato Valentin Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, São Paulo, SP
  • José Antonio Visintin Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, São Paulo, SP

DOI:

https://doi.org/10.1590/S1413-95962000000600012

Keywords:

Pigs, Indexes, Reproduction, Artificial insemination

Abstract

The data of parturition rate and litter size from the herd of the Veterinary School of São Paulo University were analysed during a four years period (1992 to 1995) in order to compare the data from artificial insemination (IA) and natural mating (CN) in different seasons, trying to study the seasonal influences and define which of these methods would be better in order to reach adequate reproductive rates. Data from 799 breeding (539 IA and 260 CN) in Landrace (L), Large White (LW) females and the cross-breed from both were analysed. Boars (L and LW) with known fertility were used either for IA or for CN. The semen doses used had at least 3 billions spermatozoa in 100 ml. The inseminations were performed 12 and 24 hours after the positive back pressure test in response to the boar, and natural mating were performed at the moment of positive back pressure test and 24 hours later. The fertility rates were 72.9% and 75.8% and the litter size was 12.4 and 12.1, for artificial insemination and natural mating, respectively, which were not different. The season influenced the parturition rate (71.2%, 81.4%, 76.9% and 66.4%, for summer, autumn, winter and spring, respectively; p < 0.05) but not the litter size.

Downloads

Download data is not yet available.

Published

2000-12-01

How to Cite

Candini, P. H., Viana, C. H. C., Madureira, E. H., Arruda, R. P. de, Celeghini, E. C. C., Assumpção, M. E. O. D., Gusmões, P. P. G., Valentin, R., & Visintin, J. A. (2000). Comparative reproductive rates using artificial insemination and natural mating under seasonal influences in swine. Brazilian Journal of Veterinary Research and Animal Science, 37(6), 486-490. https://doi.org/10.1590/S1413-95962000000600012

Issue

Section

VETERINARY MEDICINE

Most read articles by the same author(s)

<< < 1 2 3 4 5