Effects of thermal environment and supplementation levels on the physiological parameters of moxotó goats in confined and semi-confined rising systems

Engenharia Agrícola

Dermeval A. Furtado²  Carlos A. V. Gomes¹  Ariosvaldo N. Medeiros¹  Edgard C. Pimenta Filho¹  Valdi L. Júnior¹ 

[1] ,UFCG Agriculture Engineering Department Campina Grande PB ,Brazil

关键词: thermoregulation;    environmental variables;    native goat race;    semi-arid;    termorregulação;    variáveis ambientais;    caprino nativo;    semi-árido;   

DOI  :  10.1590/S0100-69162008000300001

来源: SciELO

【 摘 要 】

The objective of this work was to determine the effect of environmental variables and supplementation levels on physiological parameters of Moxotó goats in confined and semi-confined rising systems, in the Brazilian semi-arid region. The semi-confined individuals were kept on a grass based diet during the day and arrested in the end of the afternoon. The confined animals were kept in a management center, receiving two diets composed by forage cactus and maniçoba hay into two different levels (0.5 and 1.5% of the body weight). Inside the management center and in the external environment the environmental comfort parameters were set high during the afternoon period characterizing a situation of thermal discomfort for the animals. During the morning the semi-confined animals presented an average respiratory frequency (69.5 mov min-1) and rectal temperature (39.5 ºC) higher than the confined ones (62.6 mov min-1 and 39.0 ºC, respectively). The confined and semi-confined animals were able to maintain their rectal temperature within normal limits, with increase in the cardiac beatings rate and respiratory frequency. The greater percentage of the used supplementations (1.5%) seemed to increase rectal temperature in the two studied rising systems.

【 授权许可】

CC BY   
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