The objective of this study is to evaluate physiological parameters and the adaptability of Santa Inês sheep to two climatic conditions 25ºC (within the thermal comfort zone [TCZ) and 32ºC (above the TCZ) and three salinity levels (2.0, 4.0, and 8.0 dS m -1 ). The study was developed in a climatic chamber using 36 uncastrated male sheep. The experimental design was completely randomized with a 2 ´ 3 factorial scheme composed of two temperatures, three water salinity levels, and six repetitions. The physiological variables were not affected by the salinity levels. The rectal and skin temperature and the heart and respiratory rate were higher at 32 °C. However, the rectal temperature was within the normal range for the species. The consumption of water with different salt concentrations did not affect the adaptive responses of the animals and could be an alternative water source for sheep in regions where water has a high salinity level. The respiratory rate of sheep exposed to 32 °C increased to eliminate body heat, and exposure to 25 °C provided greater thermal comfort for the animals.

Desempenho de frangos alimentados com feno de maniçoba no semiárido paraibano 1 RESUMOObjetivou-se analisar o efeito da substituição parcial da ração convencional pelo feno de maniçoba (Manihot glaziovii Muell. Arg.) sobre o desempenho e qualidade de carcaça de frangos de corte tipo caipira. Utilizaramse 192 animais de quatro linhagens diferentes: Máster Griss Plumê, Plymouth Rock Barrada, pescoço pelado Label Rouge e a New Hampshire, com idade inicial de 38 dias. As aves foram distribuídas em delineamento inteiramente casualizado, com três tratamentos (substituição de 0,0; 7,5 e 15,0% da ração basal pelo feno de maniçoba) e quatro repetições, constituídas por 16 aves (dois casais de cada linhagem). Houve diminuição no consumo de proteínas e aumento no consumo de fibras com o aumento de feno na dieta e as aves que consumiram 15,0% de feno tiveram menor ganho de peso (1476,56 g ave -1 ), maior conversão alimentar (2344,19 g), menor rendimento de carcaça (70,74%) e peso absoluto do peito (417,03 g). O uso de até 7,5% de substituição da ração convencional pelo feno de maniçoba não influi no desempenho e na qualidade da carcaça.Palavras-chave: Avicultura alternativa, forrageiras nativas, qualidade da carne. Performance of broilers fed Maniçoba hay in the semiarid region of Paraíba, Brazil ABSTRACTThe objective of this work was to evaluate the effect of the partial replacement of the conventional diet with maniçoba (Manihot glaziovii Muell. Arg.) hay on the performance and carcass quality of free-range broiler chickens. 192 animals, from four different strains were used: Master Griss Plum, Barred Plymouth Rock, Naked Neck Label Rouge and New Hampshire, with initial age of 38 days. The birds were distributed in a completely randomized design with three treatments (replacement of 0.0, 7.5 and 15.0% of the basal diet with maniçoba hay) and four replications consisting of 16 birds (two pairs of each strain). There was a decrease in protein intake and an increase in fiber intake with the increase of hay in the diet, and the birds fed with 15.0% of hay had lower weight gain (1476.56 g bird -1 ), higher food conversion (2344.19 g), lower carcass percentage (70.74%) and absolute breast weight (417.03 g). It was observed that the use of up to 7.5% of ration replacement with maniçoba hay is a viable alternative.

The objective of this study is to evaluate physiological parameters and the adaptability of Santa Inês sheep to two climatic conditions 25ºC (within the thermal comfort zone [TCZ) and 32ºC (above the TCZ) and three salinity levels (2.0, 4.0, and 8.0 dS m-1). The study was developed in a climatic chamber using 36 uncastrated male sheep. The experimental design was completely randomized with a 2 ´ 3 factorial scheme composed of two temperatures, three water salinity levels, and six repetitions. The physiological variables were not affected by the salinity levels. The rectal and skin temperature and the heart and respiratory rate were higher at 32 °C. However, the rectal temperature was within the normal range for the species. The consumption of water with different salt concentrations did not affect the adaptive responses of the animals and could be an alternative water source for sheep in regions where water has a high salinity level. The respiratory rate of sheep exposed to 32 °C increased to eliminate body heat, and exposure to 25 °C provided greater thermal comfort for the animals.