Resumo

ROSERO-NOGUERA, Ricardo; POSADA-OCHOA, Sandra L.  e  MARTINEZ-ARANZALES, José R.. Comparison of mathematical models to describe the lactation curve in mares. Rev. investig. vet. Perú [online]. 2024, vol.35, n.1, e25463.  Epub 29-Fev-2024. ISSN 1609-9117.  http://dx.doi.org/10.15381/rivep.v35i1.25463.

Six non-linear mathematical models were evaluated (Wood, modified Wood, Quadratic, Sikka, Singh-Gopal and Cobby) to determine their ability to fit to describe the lactation curve in mares. The modeling was carried out from 197 records of milk production from mares between 2 and 190 days of lactation. The models were fitted using non-linear regression algorithms and were evaluated through the following comparison criteria: MAE (Mean Absolute Error), MAPE (Mean Absolute Percentage Error), RMSE (Root Mean Squared Error), AIC (Akaike information criterion), BIC (Bayesian information criterion) and residual analysis. The Wood, Singh-Gopal, modified Wood and Sikka models predicted that maximum milk production varies between 10 and 13 kg/day, which occurs between 30 and 42 days postpartum. According to the criteria evaluated, the Wood and Singh-Gopal models presented the best fit and were suitable for modeling lactation curves in equids.

Palavras-chave : equine; lactation; mare‘s milk; mathematical models; nonlinear regression.

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