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- Title
RESPUESTA AL ESTRÉS POR CALOR EN LA VACA LECHERA CRIOLLA HOLSTEIN EN LA REGION CIENEGA DEL ESTADO DE JALISCO, MEXICO.
- Authors
Aguilar-Aldrete, Arturo; Bañuelos-Pineda, Jacinto; Pimienta-Barrios, Eulogio; Aguilar-Flores, Gustavo
- Abstract
In beef cattle animal welfare has become a determining factor for better productive expression with technical and economic viability of companies, so that heat stress of these, is a situation causing concern for companies targeting the milk production in regions with humid to semi-dry climate. The aim of the study was to determine the response to heat stress in a herd of 100 dairy cows (VL), kept under a dual purpose, in the region of Jalisco Cienega, considering stress indicators rectal temperature (TR) and respiratory rate (RR). Also analyzed the behavior of indicators of climate: temperature (RT) and relative humidity (RH, %) thermoregulation in the study region for two years. The climate of the region showed a high stability in the study period, and a clear seasonality between the dry and rainy seasons, a temperature and humidity index (THI) different between seasons and between morning and evening readings (p < 0.001). Changes between the response variables to heat stress of the cow FR allowed, via cluster test, set three different heat stress respons: 36 dairy cows without stress (FR > 36 rpm), 29 dairy cows with mild and moderate stress (46 -60 rpm) and 35 dairy cows with high stress (61-90 rpm). These data show that native Holstein cows Cienega region of Jalisco were not a homogeneous group with heat stress, and allow future programs establish criteria for selection of this breed in region testing heat tolerance in cattle were performed using various forms of exposing them to heat stress.
- Subjects
PHYSIOLOGICAL effects of heat; BEEF cattle; ANIMAL welfare; ATMOSPHERIC temperature research; CLIMATE research
- Publication
Abanico Veterinario, 2014, Vol 4, Issue 3, p31
- ISSN
2007-428X
- Publication type
Article