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In dual-purpose subtropical goats, 1 h of extra-light given from 16 to 17 h after dawn (pulse of light) in winter stimulates milk yield

Published online by Cambridge University Press:  22 July 2019

Edwin S Mendieta ,
Manuel de J Flores ,
José A Delgadillo ,
José A Flores ,
Marie Bedos ,
Luís A Zarazaga ,
Ricardo Avilés ,
Angélica Terrazas ,
Jesús Vielma  and
Gerardo Duarte
...Show all authors
Edwin S Mendieta
Affiliation:
Centro de Investigación en Reproducción Caprina, Posgrado en Ciencias Agrarias, Universidad Autónoma Agraria Antonio Narro, Torreón, Coahuila, Mexico
Manuel de J Flores
Affiliation:
Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias, Campo Experimental La Laguna, Matamoros, Coahuila, Mexico
José A Delgadillo
Affiliation:
Centro de Investigación en Reproducción Caprina, Posgrado en Ciencias Agrarias, Universidad Autónoma Agraria Antonio Narro, Torreón, Coahuila, Mexico
José A Flores
Affiliation:
Centro de Investigación en Reproducción Caprina, Posgrado en Ciencias Agrarias, Universidad Autónoma Agraria Antonio Narro, Torreón, Coahuila, Mexico
Marie Bedos
Affiliation:
CONACYT—Instituto de Neurobiología, Universidad Nacional Autónoma de México, Campus UNAM-Juriquilla, Querétaro, Querétaro, Mexico
Luís A Zarazaga
Affiliation:
Departamento de Ciencias Agroforestales, Universidad de Huelva, Palos de la Frontera, Huelva, Spain
Ricardo Avilés
Affiliation:
Centro de Investigación en Reproducción Caprina, Posgrado en Ciencias Agrarias, Universidad Autónoma Agraria Antonio Narro, Torreón, Coahuila, Mexico
Angélica Terrazas
Affiliation:
Departamento de Ciencias Pecuarias, Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, Cuautitlán Izcalli, Estado de México, Mexico
Jesús Vielma
Affiliation:
Centro de Investigación en Reproducción Caprina, Posgrado en Ciencias Agrarias, Universidad Autónoma Agraria Antonio Narro, Torreón, Coahuila, Mexico
Gerardo Duarte
Affiliation:
Centro de Investigación en Reproducción Caprina, Posgrado en Ciencias Agrarias, Universidad Autónoma Agraria Antonio Narro, Torreón, Coahuila, Mexico
Horacio Hernández*
Affiliation:
Centro de Investigación en Reproducción Caprina, Posgrado en Ciencias Agrarias, Universidad Autónoma Agraria Antonio Narro, Torreón, Coahuila, Mexico
*
Author for correspondence: Horacio Hernandez, Email: [email protected]
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Abstract

This research communication addresses the hypothesis that in dual-purpose goats, exposure to 1 h of extra-light given from 16 to 17 h after dawn (pulse of light) in winter stimulates milk yield. One group of goats was maintained under natural short photoperiod (natural day; ND (n = 7)). Another group of lactating females was submitted to an artificial long-day photoperiod consisting of 16 h light and 8 h darkness (long days; LD (n = 7)). A third group of females received one single hour of extra-light 16 h after the fixed dawn (pulse of light; PL (n = 6)). Goats from LD and PL yielded 30% more milk than goats from ND. Mean percentages of fat, protein and lactose contents in milk did not differ between the 3 groups at any stage of lactation, but these components in grams/day were higher in goats from PL than in the others two groups within the first 45 d of lactation. In conclusion, dual-purpose lactating goats that started their lactation during natural short days, the daily exposition to a 1-h pulse of light is sufficient to stimulate milk yield compared to females maintained under natural short photoperiod.

Keywords

Goatlactationlight-pulsephotoperiod
Type
Research Article
Information
Journal of Dairy Research , Volume 86 , Issue 3 , August 2019 , pp. 303 - 306
Copyright
Copyright © Hannah Dairy Research Foundation 2019 

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