publication . Article . Other literature type . 2018

The application of a mechanistic model to analyze the factors that affect the lactation curve parameters of dairy sheep in Mexico

Angeles-Hernandez, Juan C.; Pollott, Geoff; Albarran-Portillo, Benito; Ramírez-Perez, Aurora H.; Lizarazo-Chaparro, Augusto; Castelan Ortega, Octavio A.; Gonzalez Ronquillo, Manuel;
Open Access English
  • Published: 01 Jul 2018
  • Country: United Kingdom
Abstract
Pollott́s mechanistic model has been designed to describe lactation curve parameters based on the known biology of milk production and can be useful for analyzing the factors that affect this process. A total of 553 lactations (9956 weekly test-day records) of crossbred dairy sheep from four commercial farms located in Mexico, were analyzed to investigate environmental factors that influenced lactation curve parameters, using Pollott’s 5-parameter additive model. This model was fitted to each lactation using an iterative nonlinear procedure. The estimated parameters were maximum milk secretion potential (MSmax), relative rate of increase in cell differentiation ...
Subjects
free text keywords: Food Animals, Animal Science and Zoology, General linear model, Animal science, Endocrinology, medicine.medical_specialty, medicine, Rate of increase, Crossbreed, Lactation, medicine.anatomical_structure, Domestic sheep reproduction, Internal medicine, Flock, Biology
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