Ponderal development and growth traits of Anglonubian goats raised under semi-intensive system
Abstract
The goal of this study was to characterize, by mathematic models, the growth pattern of Anglonubian goats raised under semi-intensive system. Data from 43 males and 33 females were used to estimate the growth of animals based on non-linear models. The effects from sex, birth month and birth type on living weight and on average daily weight gain (DWG) at different ages were analyzed. The logistic model has proved to be the most adequate one to estimate the growth curves of males and females. The birth type influenced the living weight up to 60 days of age (P<0.05) and the birth month presented no effects. The sex affected the GPD until 150 days of age and affected the living weight at all ages, with males heavier than females (P<0.05). The DWG was higher at younger ages, being equal to 194 ± 42 g from birth to 30 days and 91 ± 60 g from 210 to 240 days, with about 150 g/day from birth to 150 days of age. Anglonubian goats raised under semi-intensive system show satisfactory performance for meat production and the logistic model is adequate to estimate the growth pattern of the kids from this breed.Downloads
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Published
2009-06-30
Issue
Section
Animal Breeding and Genetic
License
Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons