REPRODUCTIVE CHARACTERISTICS OF BUFFALOES RAISED IN FLOODPLAIN AND MAIN LAND IN PARÁ STATE. I. AGE AT FIRST CALVING, INTER CALVING INTERVAL, CALVING SEASON, REPRODUCTIVE EFFICIENCY AND PREGNANCY RATES.
DOI:
https://doi.org/10.5216/cab.v10i3.3422Keywords:
Buffaloes productionAbstract
The objective of this work was to evaluate the reproductive efficiency of a buffaloes flock raised in a productive system of river and main land/artificial pasture in Belém County, Pará, state. Data on 770 female buffaloes in a total of 2115 parturition registers have been analyzed. From this herd 57 animals were submitted to gynecological examination and selected according to the body score condition (BSC) in a scale of (1-5) and inseminated in a program of fixed time for artificial insemination (FTAI). The animals were divided in two groups, the Group 1 (G1) with 31 animals and Group 2 (G2) with 26 animals, both synchronized by the protocol Ovsynch and inseminated in fixed time with 00:00h and 24:00h after of GnRH. The age for first parturition (AFP) for the whole herd was 39.52±7.54 months. The AFP related to the natural mating (NM), artificial insemination (AI) and fixed timed artificial insemination (FTAI), was of 39.5±6.58; 39.6±9.85 and 36.6±7.12 months, respectively. Considering the seasonal rain annual distribution, the AFP and the calving interval (CI) was 39.40±7.29 and 38.74±7.76, 17.09±4.71 and 16.54±3.74 months, for rainy and less rainy period, respectively, with a concentration between March to August through 1974 and 2005. The overall average for CI 16.54±3.74 meses months. Moreover, according to the reproductive system employed, natural mated (NM), AI and FTAI was17.31, 18.43 and 20.79 months, respectively. The overall reproductive efficiency (RE) was of 0.67±0.13, and for the animals submitted to the NM, AI and FTAI was 0.69; 0.56; 0.63 respectively. The pregnancy rates obtained for each group, taking in account the moment or time for artificial insemination and the application of GnRH was of 25.81%(08/31) in the animals inseminated on 00:00h and of 30,77 % (08/26) in the inseminated on 24:00h.KEY WORDS: Buffaloes, calving interval, reproductive efficiency.
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Published
2009-09-30
How to Cite
ROLIM FILHO, S. T.; RIBEIRO, H. F. L.; VALE, W. G.; PICANÇO, N. da S.; BARBOSA, E. M.; FERREIRA, R. N. REPRODUCTIVE CHARACTERISTICS OF BUFFALOES RAISED IN FLOODPLAIN AND MAIN LAND IN PARÁ STATE. I. AGE AT FIRST CALVING, INTER CALVING INTERVAL, CALVING SEASON, REPRODUCTIVE EFFICIENCY AND PREGNANCY RATES. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 10, n. 3, p. 754–763, 2009. DOI: 10.5216/cab.v10i3.3422. Disponível em: https://revistas.ufg.br/vet/article/view/3422. Acesso em: 21 dec. 2024.
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Animal Production
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