Shape of curve lactation affects the fitting of empirical and mechanistic models applied to dairy sheep lactations in Mexico

Lilian Paola Guevara Muñeton; Leonardo Siquieira  Gloria; Mohamed Benaouda; Isaac Alberto Teuntle-Lopez; Ximena Sofia Valdes-Cordoba; Juan Carlos Angeles-Hernandez; Elon Souza Aniceto; Armando Peláez Acero

doi:10.53588/alpa.310553

Lilian Paola Guevara Muñeton Universidade Estadual do Norte Fluminense https://orcid.org/0000-0002-6973-9538
Leonardo Siquieira Gloria Universidade Estadual do Norte Fluminense https://orcid.org/0000-0002-2756-5939
Mohamed Benaouda L’Institut Agro Dijon
Isaac Alberto Teuntle-Lopez Instituto de Ciencias Agropecuarias, Universidad Autónoma del Estado de Hidalgo
Ximena Sofia Valdes-Cordoba Instituto de Ciencias Agropecuarias, Universidad Autónoma del Estado de Hidalgo
Juan Carlos Angeles-Hernandez Instituto de Ciencias Agropecuarias, Universidad Autónoma del Estado de Hidalgo https://orcid.org/0000-0001-5303-1685
Elon Souza Aniceto Universidade Estadual do Norte Fluminense https://orcid.org/0000-0002-6967-2361
Armando Peláez Acero Instituto de Ciencias Agropecuarias https://orcid.org/0000-0001-7004-4824

DOI: https://doi.org/10.53588/alpa.310553

Keywords: Wood model, Wilmink model, Dijkstra model, ewes, Pollott model

Abstract

The ability of mathematical models to represent the lactation process varies according with their mathematical structure and database characteristics. The aim of the current study was evaluated the goodness of fit of empirical and mechanistic models applied to dairy sheep lactation curves with different shapes. A total of 4,494 weekly test day records were analyzed. All lactations were individually fitted using two empirical (Wood and Wilmink) and two mechanistic (Dijkstra, and Pollott) models. The Dijkstra model showed the best performance to typical curves and Wood model to atypical curves (without peak lactation). Therefore, the selection of the mathematical model to fit sheep lactation curves must consider the specific patter of milk production.

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References

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