Effect of season and parity on water buffalo calving distribution throughout the year in Venezuela

Autores

  • Héctor Nava-Trujillo Universidad de los Andes (ULA)
  • Robert Valeris-Chacin Universidad del Zulia (LUZ) | University of Minnesota (UMN)
  • Javier Hernandez Universidad de los Andes (ULA)
  • Mariano Duran Nuñez Universidad de los Andes (ULA).
  • Adriana Morgado-Osorio Universidad de los Andes (ULA)
  • Janeth Caamaño Universidad de los Andes (ULA)
  • Armando Quintero-Moreno Universidad del Zulia (LUZ)

DOI:

https://doi.org/10.7213/1981-4178.2019.17013

Palavras-chave:

Buffalo cows. Seasonality. Photoperiod. Short days. Parity.

Resumo

The aim of this study was to determine the effect of season and parity on water buffalo calving distribution throughout the year in Venezuela. A retrospective study analyzing records of 3,192 crossbred (Murrah/Mediterranean) buffaloes including 7,790 calvings was carried out in Venezuela. Two seasons were evaluated according to the length of the photoperiod: September-February (short photoperiod; autumn-winter) and March-August (long photoperiod; spring-summer). Parity order was categorized in parity 1, parity 2, parity 3, and parity 4. Photoperiod was shorter between September and February in comparison with March-August (11.81 ± 0.08 h/day and 12.42±0.08 h/day, respectively, p < 0.05). Percentage of calving varied between the two seasons
(p < 0.05), and 63.7% (95% Confidence Interval (CI): 62.5%-64.9%) of calving occurred during the season of short photoperiod in comparison with that of the season of long photoperiod (36.3%, 95% CI: 35.1%-37.5%), and this effect was observed in all parities. The proportion of calvings during the short photoperiod season was greater as parity increased. The percentage of calving during the short photoperiod season was lower in primiparous water buffalo cows in comparison with that of multiparous water buffalo cows; conversely, the percentage of calving during the long photoperiod season was higher in primiparous water buffalo cows in comparison with that of multiparous water buffalo cows. Eight percent of water buffalo cows having their first calving in the long photoperiod season had the next calvings during this season. In conclusion, results confirm the seasonal reproductive behavior of water buffaloes with a concentration of calvings during the months with short photoperiod; this seasonality becomes stronger as parity increases; even though a small percentage of water buffalo cows has the ability of calving constantly during long photoperiod.  

Downloads

Não há dados estatísticos.

Biografia do Autor

Héctor Nava-Trujillo, Universidad de los Andes (ULA)

Producción Animal, Instituto de Investigaciones Agropecuarias, Facultad de Ciencias Forestales y Ambientales.

Robert Valeris-Chacin, Universidad del Zulia (LUZ) | University of Minnesota (UMN)

Departamento de Sanidad Animal y Salud Pública, Facultad de Ciencias Veterinarias | Department of Veterinary and Biomedical Sciences, College of Veterinary Medicine

Javier Hernandez, Universidad de los Andes (ULA)

Producción Vegetal, Instituto de Investigaciones Agropecuarias, Facultad de Ciencias Forestales y Ambientales.

Mariano Duran Nuñez, Universidad de los Andes (ULA).

Departametno de Manejo de Bosques, Escuela de Ingeniería Forestal, Facultad de Ciencias Forestales y Ambientales.

Adriana Morgado-Osorio, Universidad de los Andes (ULA)

Producción Animal, Instituto de Investigaciones Agropecuarias, Facultad de Ciencias Forestales y Ambientales.

Janeth Caamaño, Universidad de los Andes (ULA)

Producción Animal, Instituto de Investigaciones Agropecuarias, Facultad de Ciencias Forestales y Ambientales.

Armando Quintero-Moreno, Universidad del Zulia (LUZ)

Laboratorio de Andrología, Facultad de Ciencias Veterinarias.

Downloads

Como Citar

1.
Nava-Trujillo H, Valeris-Chacin R, Hernandez J, Duran Nuñez M, Morgado-Osorio A, Caamaño J, Quintero-Moreno A. Effect of season and parity on water buffalo calving distribution throughout the year in Venezuela. Rev. Acad. Ciênc. Anim. [Internet]. 12º de fevereiro de 2019 [citado 29º de março de 2024];17:1-9. Disponível em: https://periodicos.pucpr.br/cienciaanimal/article/view/25818

Edição

Seção

Artigo