Indicadores del alimentador automático en terneros de la raza Holstein Frisian en la región de entre Douro y Minho de Portugal

• J.O.L. Cerqueira ^[1] ; S.M. Paço ^[1] ; F.C. Faria ; I. Blanco Penedo ; J. Cantalapiedra ; J.P. Araújo ^[1]
  1. [1] Instituto Politécnico de Viana do Castelo

     Instituto Politécnico de Viana do Castelo

     Viana do Castelo (Monserrate), Portugal

     
• Localización: XVI Jornadas sobre Producción Animal: 19 y 20 de mayo de 2015, Zaragoza / Javier Álvarez Rodríguez (aut.), Begoña Panea Doblado (aut.), Jorge Hugo Calvo Lacosta (aut.), Mireia Blanco Alibés (aut.), José Alfonso Abecia Martínez (aut.), Daniel Villalba Mata (aut.), María Ángeles Latorre Górriz (aut.), Vol. 1, 2015, ISBN 978-84-606-7969-1, págs. 105-107
• Idioma: español
• Títulos paralelos:
  • Indicators of automatic feeder in the Holstein Friesian calves in the entre Douro e Minho regions in Portugal
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• Resumen

  • The age of weaning for calves of Holstein Friesian was 88.9±2.2 days, ranging from 85 days (Farm B) up to 97 days old (Farm D). From the analysis of the different indicators of the automatic feeder, it was found a negative correlation between the age and the thoracic perimeter (0.75) of the calves. Weak correlations were found between frecuency of visiting the automatic feed ± the velocity of suckling in calves (0.28) and the velocity of suckling in calves - thoracic perimeter (0.38). Parameters such as age and thoracic perimeter had negative correlations regarding the amount of ingested milk (-0.35 and -0.31 respetively). The two principal components explained 67.8% of the total variation. The first principal component represented 42.9% of the variability, integrated by the variables amount of ingested milk and the frecuency of visits. The second factor represented 24.9% of the total variance. The higher percentage of the variance is explained by thoracic perimeter, age and velocity of suckling.