Curvas de lactancia de cabras mestizas utilizando modelos matemáticos no lineales
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Date
2009
Journal Title
Journal ISSN
Volume Title
Publisher
Corporación Universitaria Lasallista
Abstract
Introduction. Lactation curves in milk cattle are now
an important tool to select female animals with high
genetic values, allowing the increase and optimization
of milk production in herds. Objective. To identify the
best mathematical functions to explain the curves of
milk production, time and peak production in goats
with different hybridations, kept in an Antioquian
sheepfold. Materials and methods. 865 milk
weightings from 32 lactations that took place in 2007
were used. The milk came from hybrid goats, from
different births. Four nonlinear mathematical models
were evaluated and the significant curves percentage
(P< 0.05), the Akaike and Bayesino´s criteria and the
values of the determination quotient R2 were taken
into account to select the best of those models.
Results.Papajcsik and Bordero´s model was
identified as the one that best adjusted the lactation
curves in this population, with lower AIC and BIC
values, a high significance of the model (P<0.001)
and a convergence of 100% of the goats, regardless
of the number of lactations. Besides, peak production
was estimated (ymax) for female goats with 1, 2, 3 or more births, and it was 3.06 ± 0.966, 3.10 ± 0.875
and 3.36 ± 0.691 kg, respectively. Conclusion.
Papajcsik and Bordero´s model allows the modeling
of lactation curves in goats.
Description
Keywords
Curvas de lactancia, Corporación Universitaria Lasallista, Caprinos, Pequeños rumiantes, Leche de cabra, Leche - Producción