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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. Este trabalho teve os objetivos de determinar e de avaliar o efeito das variáveis ambientais e quantidade de suplementação, com concentrados, nas variáveis fisiológicas de caprinos Moxotó, confinados e semiconfinados, no semi-árido nordestino. Os animais semiconfinados foram mantidos em regime de pasto durante o dia e recolhidos ao final da tarde. Os animais confinados foram mantidos em um centro de manejo, recebendo duas dietas compostas por palma forrageira e feno de maniçoba, com duas quantidades de concentrados (0,5 e 1,5% do peso vivo). No interior do aprisco e no ambiente externo, os índices de conforto ambiental ficaram elevados no período da tarde, caracterizando situação de desconforto térmico para os animais. No período da manhã, os animais semiconfinados apresentaram freqüência respiratória média de 69,5 mov min -1 e temperatura retal de 39,5 ºC, mais elevadas que os confinados (62,6 mov min-1 e 39,0 ºC, respectivamente). Tanto os animais confinados como os semiconfinados conseguiram manter a temperatura retal dentro dos limites normais, havendo aumento nos batimentos cardíacos e na freqüência respiratória. Maior percentagem de suplementação (1,5%) provocou aumento na temperatura retal, nos dois sistemas de criação

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