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Predicting milk yield in Pelibuey ewes from the udder volume measurement with a simple method

Published online by Cambridge University Press:  04 September 2020

Roger Iván Espinosa-Mendoza
Affiliation:
Division Académica de Ciencias Agropecuarias, Universidad Juárez Autónoma de Tabasco, Carr. Villahermosa-Teapa, km 25, CP 86280, Villahermosa, Tabasco, México Universidad Autónoma de Chiapas, Facultad de Medicina Veterinaria y Zootecnia, boulevard universitario km 2, CP 29520, Pichucalco, Chiapas, México
Darwin Nicolas Arcos-Álvarez
Affiliation:
Division Académica de Ciencias Agropecuarias, Universidad Juárez Autónoma de Tabasco, Carr. Villahermosa-Teapa, km 25, CP 86280, Villahermosa, Tabasco, México
Ricardo Alfonso Garcia-Herrera
Affiliation:
Division Académica de Ciencias Agropecuarias, Universidad Juárez Autónoma de Tabasco, Carr. Villahermosa-Teapa, km 25, CP 86280, Villahermosa, Tabasco, México
Gamaliel Antonio-Molina
Affiliation:
Universidad Autónoma de Chiapas, Facultad de Medicina Veterinaria y Zootecnia, boulevard universitario km 2, CP 29520, Pichucalco, Chiapas, México
Ricardo Vicente-Pérez
Affiliation:
Departamento de Producción Agrícola, Centro Universitario de la Costa Sur, Universidad de Guadalajara, Autlán de Navarro, Jalisco, 48900, México
Ulises Macias-Cruz
Affiliation:
Instituto de Ciencias Agrícolas, Universidad Autónoma de Baja California, Ejido Nuevo León S/N, Mexicali, B.C., CP. 21705, México
Manuel González Ronquillo
Affiliation:
Universidad Autónoma del Estado de México, Facultad de Medicina Veterinaria y Zootecnia, Departamento de Nutrición Animal. Instituto Literario no. 100, Col. Centro, Toluca, 50000, México
Augusto Cesar Lizarazo Chaparro
Affiliation:
Universidad Nacional Autónoma de México, Centro de Enseñanza Práctica e Investigación en Producción y Salud Animal, Facultad de Medicina Veterinaria y Zootecnia, Av Cruz Blanca 486, San Miguel Topilejo, CDMX., CP 04700, México
Alfonso Juventino Chay-Canul*
Affiliation:
Division Académica de Ciencias Agropecuarias, Universidad Juárez Autónoma de Tabasco, Carr. Villahermosa-Teapa, km 25, CP 86280, Villahermosa, Tabasco, México
*
Author for correspondence: Alfonso Juventino Chay-Canul, Email: [email protected]

Abstract

In this research communication we describe the creation of an equation for the prediction of milk yield (MY) from udder volume (UV). A total of 280 measurements were collected between 5 and 15 d postpartum (pp) from 36 multiparous Pelibuey ewes. Study variables were measured between 2 and 9 weeks pp and MY was measured by manual milking, UV prior to and following milking was measured using the technique of making moulds from aluminium foil. The MY ranged from 0.09 to 0.83 kg/d, meanwhile UV prior and following milking ranged from 155 to 1940 and 90 to 1520 cm3, respectively. Measurements of UV had a moderate to high (P < 0.01; 0.58 ≤ r ≤ 0.78) correlation with MY. The UV prior to milking was the best prediction model for MY, which explained 62% of the variation in MY. This equation presented moderate precision (r2 = 0.61) and high accuracy (bias correction factor = 0.94), confirming a good reproducibility index (concordance correlation coefficient = 0.73). Modelling efficiency (MEF = 0.59) showed moderate concordance between observed and predicted values. In conclusion, MY in lactating Pelibuey ewes could be predicted in a moderate way using the predictor variable UV measured with the technique of moulds made with aluminium foil.

Type
Research Article
Copyright
Copyright © The Author(s), 2020. Published by Cambridge University Press on behalf of Hannah Dairy Research Foundation.

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