Thermal comfort parameters of native goats raised in confinement in the semiarid of Paraíba State

Revista Brasileira de Engenharia Agrícola e Ambiental

Leite, Jackson R. de S.¹  Souza, Bonifácio B.³  Silva, Andrea S. da¹  Leal, Antônio F.²  Furtado, Dermeval A.² 

[1] UFCG, Campina Grande;UFCG, Patos

关键词: adaptability;    animal bioclimatology;    thermal stress    INTRODUÇÃOOs caprinos;    tal como outros mamíferos;    são amimais homeotérmicos;    ou seja;    apresentam a capacidade de controlar;    dentro de uma pequena margem;    a temperatura interna do corpo;    mecanismo este eficaz quando a temperatura ambiente está dentro de certos limites;    o que demonstra a importância de se manter as instalações com temperaturas ambientais próximas às das condições de conforto (Santos et al;   

DOI  :  10.1590/S1415-43662012000400015

学科分类：农业科学（综合）

来源: Universidade Federal de Campina Grande * Centro de Ciencias e Tecnologia

【 摘 要 】

The objective of this work was to determine the thermal comfort indexes and their effects on physiological parameters of native goats raised in confinement in the Cariri region of Paraíba state. In this study 36 non-castrated male animals, were used, 12 per genetic group, which were Moxotó, Azul and Graúna, with an average weight of 16.6 ± 1.7 kg, distributed in a completely randomized design in 3 x 5 factorial arrangement (three breeds and five observation times). The studied environmental data were collected by an electronic data acquisition model CR1000. To evaluate the physiological parameters rectal temperature, respiratory frequency and surface temperature were measured three days a week from 6 a.m to 6 p.m with an interval of three hours. Environmental parameters increased from 12 h to reach critical values at 3 p.m, characterizing a situation of thermal discomfort. The animals could maintain a rectal temperature within normal limits, but with increasing respiratory frequency. The superficial temperature did not very among races. The animals of breed Graúna presented higher daily weight gain during the experimental period in comparison to other breeds.

【 授权许可】

CC BY-NC