Production performance of sheep and goat breeds at a farm in a semi-arid region of Namibia
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Date
2020
Journal Title
Journal ISSN
Volume Title
Publisher
University of Namibia
Abstract
This study retrospectively investigated the effect of breed and season on the lambing/kidding dynamics, growth performance,
neonatal viability, and weaning dynamics of sheep (Damara, Dorper, and Swakara) and goats (Boer goat and Kalahari Red) at a farm in the Khomas Region of Namibia between 2004 and 2015. Litter size was dependent on breed (X2(12, N = 3388) = 796,p < 0.001), with twinning more frequent in Dorper sheep and Kalahari Red and Boer goats than in the Damara and Swakara sheep (p < 0.05), while triplets were more prevalent in the Dorper sheep and Kalahari Red goats (2.8% and 1.0%, respectively;
p < 0.05). Distribution of birth weight categories was dependent on breed. There was a significant difference in the proportions
of birth weight categories between breeds (X2(12, N = 3388) = 467, p < 0.001)whereby Dorper lambs weremostly bornweighing
below 3 kg (2.6%, p < 0.05); Boer goat kids, Kalahari Red kids, and Damara lambs were mostly born weighing 3 to < 4 kg (4.3%,
6.3% and 19.9%, respectively; p < 0.05); Swakara lambs were mostly born weighing 4 to < 5 kg (12.2%, p < 0.05), and Swakara
lambs were mostly born weighing ≥ 5 kg (3.3% and 2.3%, respectively, p < 0.05). Weaning age categories were dependent on breed (X2(12, N = 3388) = 241, p < 0.001) whereby Dorper lambs were mostly weaned at below 3 months of age (2.8%,
p < 0.05); Damara lambs were mostly weaned at 3 to < 5 months of age (12%, p < 0.05), and Boer goat kids were mostly weaned
at ≥ 5 months of age (0.9%, p < 0.05). Neonatal viability was dependent on breed (X2(8, N = 3388) = 49.2, p < 0.001) whereby Dorper lambs were more susceptible to abortions and neonatal deaths (0.6% and 1.5%, respectively; p < 0.05) than the rest of the breeds. Breed and lambing season interacted to produce effects on the birth weight of offspring although lambing season alone did not have a significant effect on Boer goat and Kalahari Red kids’ birth weights.
Description
Keywords
Lambing, Birthweight, Viability
Citation
Kandiwa, E., et al. Production performance of sheep and goat breeds at a farm in a semi-arid region of Namibia. Tropical Animal Health and Production, 1-9.