F1 Holstein x Zebu Cows in late pregnancy show physiological adaptation when raised in semiarid environment

Authors

  • Thamara Amaral Diniz Universidade Estadual de Montes Claros
  • Cinara da Cunha Siqueira Carvalho Universidade Estadual de Montes Claros
  • Heberth Christian Ferreira Universidade Estadual de Montes Claros
  • Anna Luísa de Oliveira Castro Universidade Estadual de Montes Claros
  • Kátia Cristiane Borges Pereira Universidade Estadual de Montes Claros
  • Maria Cecília Magalhães Gonçalves Universidade Estadual de Montes Claros
  • Thaís Emanuele Soares Universidade Estadual de Montes Claros
  • Jordana Carvalho Menezes Universidade Estadual de Montes Claros

DOI:

https://doi.org/10.5965/223811711612017070

Keywords:

Family farming, Ambience, Dairy cattle, Heterosis.

Abstract

This study aimed to verify the adaptability of F1 Holstein x Zebu cows in the late pregnancy third, raised in the semiarid region of Minas Gerais, by means of physiological responses. A total of ten cows were used, all in fourth pregnancy. To characterize the climatic environment, daily collections of air temperature, air relative humidity and wind speed were carried out to enable the calculation of the Globe Temperature and Humidity Index (GTHI) and Radiant Thermal Load (RTL). The physiological parameters analyzed were: respiratory frequency, rectal temperature and surface body temperature, at 10 am and 3 pm. The adaptability tests used were Heat Tolerance Index (HTI) and Heat Tolerance Coefficient (HTC). The climatic environment was out of thermal comfort in the afternoon. There were significant differences (P <0.05) for the values of the physiological parameters. However, these responses were within the comfort range recommended for crossbred animals. The adaptability tests confirmed that the animals show adaptation to the semiarid environment of Minas Gerais, showing differences (P <0.05) on HTC between 10 am (2.52) and 3 pm (2.64), and the HTI showed an average of 9.64, a value that is very close to the index 10. It is concluded that the F1 Holstein x Zebu cows in the late pregnancy third are adapted to the climate in the semiarid region of Minas Gerais, for not altering their physiological behavior in face of the adversities of the climatic environment.

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Author Biographies

Thamara Amaral Diniz, Universidade Estadual de Montes Claros

Zootecnista, UNIMONTES

Cinara da Cunha Siqueira Carvalho, Universidade Estadual de Montes Claros

Engenheira Agrícola (UFLA), Mestrado em Construções Rurais e Ambiência (UFLA), Doutorado e Pós-doutorado em Construções Rurais e Ambiência (UFV). Atualmente, professora de Ambiência, no curso de pós-graduação em Zootecnia, na Universidade Estadual de Montes Claros.

Heberth Christian Ferreira, Universidade Estadual de Montes Claros

Acadêmico em Zootecnia - UNIMONTES

Anna Luísa de Oliveira Castro, Universidade Estadual de Montes Claros

Graduação e Mestrado em Zootecnia - UNIMONTES

Kátia Cristiane Borges Pereira, Universidade Estadual de Montes Claros

Graduação e Mestrado em Zootecnia - UNIMONTES

Maria Cecília Magalhães Gonçalves, Universidade Estadual de Montes Claros

Acadêmica em Zootecnia - UNIMONTES

Thaís Emanuele Soares, Universidade Estadual de Montes Claros

Mestranda em Zootecnia - UNIMONTES

Jordana Carvalho Menezes, Universidade Estadual de Montes Claros

Mestranda em Zootecnia - UNIMONTES

Published

2017-03-09

How to Cite

DINIZ, Thamara Amaral; CARVALHO, Cinara da Cunha Siqueira; FERREIRA, Heberth Christian; CASTRO, Anna Luísa de Oliveira; PEREIRA, Kátia Cristiane Borges; GONÇALVES, Maria Cecília Magalhães; SOARES, Thaís Emanuele; MENEZES, Jordana Carvalho. F1 Holstein x Zebu Cows in late pregnancy show physiological adaptation when raised in semiarid environment. Revista de Ciências Agroveterinárias, Lages, v. 16, n. 1, p. 70–75, 2017. DOI: 10.5965/223811711612017070. Disponível em: https://revistas.udesc.br/index.php/agroveterinaria/article/view/223811711612017070. Acesso em: 21 nov. 2024.

Issue

Section

Research Article - Science of Animals and Derived Products

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