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A field study of reproductive performance and productivity of Pelibuey ewes in Southeastern Mexico
- Source :
- Tropical Animal Health and Production. 45:1771-1776
- Publication Year :
- 2013
- Publisher :
- Springer Science and Business Media LLC, 2013.
-
Abstract
- The objective was to evaluate the reproductive performance and productivity of Pelibuey ewes in two flocks in Southeastern Mexico. Animals grazed on irrigated star grass (Cynodon plectostachyus). In flock 1, lambs grazed with their mothers from 7 to 70 days of age (weaning age), whereas in flock 2, they were confined and offered chopped grass, a commercial concentrated and managed under restricted suckling until weaning at 60 days of age.. The statistical model included the fixed effects of flock, year and season of lambing, parity number, litter size at weaning, first order interactions and the random effects of ewe and the error term. The means ± SD for age at first lambing, prolificacy, lambing interval (LI), weaning weight, and productivity were 477 ± 85.5 days, 1.41 ± 0.51 lambs, 255.9 ± 51.8 days, 16.5 ± 4 kg, and 18.1 ± 4.42 kg of lamb weaned, respectively. Repeatability estimates for the latter four traits were 0.09, 0.07, 0.11, and 0.13, respectively. All main effects in the models were significant (P
- Subjects :
- Male
Litter (animal)
Wet season
Veterinary medicine
Litter Size
animal diseases
Biology
Animal science
Food Animals
Pregnancy
Animals
Birth Weight
Weaning
Animal Husbandry
Mexico
Retrospective Studies
Tropical Climate
Sheep
Reproduction
Domestic sheep reproduction
Reproducibility of Results
Random effects model
Parity
Animals, Newborn
Productivity (ecology)
Female
Animal Science and Zoology
Seasons
Flock
Parity (mathematics)
Subjects
Details
- ISSN :
- 15737438 and 00494747
- Volume :
- 45
- Database :
- OpenAIRE
- Journal :
- Tropical Animal Health and Production
- Accession number :
- edsair.doi.dedup.....13876549fb59f665595e0dda206a583b