Traditional system of goat management: I. Pre-weaning growth performance of the SRD (non-descript) goats
The effects of season, sex and type of birth as well as all possible interactions were studied for birth weight (BW), weights at 41 (W1), 69 (W2), 97 (W3), and 125 (W4) days after birth and weight gains at intervals between the time of birth and 41 days of age (G1), 41 and 69 days (G2), 69 and 97 days (G3), 97 and 125 days (G4) of age after birth. Data were initialy recorded on 120 kids born in the years 1979 and 1980 and raised at the Centro Nacional de Pesquisa de Caprinos research farm, Sobral, State of Ceará, Brazil. The analysis of variance showed that season of birth had a highly significant (P<0.005) effect on alt weights analysed and on G1 and G4. The significant level was smaller (P<0.025) for G2 and G3 . Kids born in the rainy season were heavier and had higher weight gains than kids born in the dry season. Sex had a significant influence on BW, W2, W4 (P<0.05), W3 (P<0.025), W1 and G1 (P<0.005). Males were superior to females, except in G4 where an inverse trend was observed. Type of birth was significant (P<0.005) for all the weight variables studied, including G1. Single born kids showed higher weight gains than did multiple born kids. With the exception of the season X type of birth interaction which was significant (P <0.025) for BW, all other interactions analized were none significant for the variables studied.
| Main Authors: | , , , |
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| Format: | Digital revista |
| Language: | eng |
| Published: |
Pesquisa Agropecuaria Brasileira
2014
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| Online Access: | https://seer.sct.embrapa.br/index.php/pab/article/view/15298 |
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