Adaptabilidade de ovinos Dorper e White Dorper no período chuvoso no Nordeste do Brasil

Abstract

This study aimed to evaluate the adaptability of Dorper and White Dorper sheep raised under a confinement system during the rainy season in the Cariri region of Ceará, based on the analysis of climatic and physiological parameters related to heat stress. The research was conducted in the municipality of Crato–CE, where air temperature, relative humidity, and the temperature-humidity index (THI) were monitored, as well as physiological parameters such as heart rate, respiratory rate, rectal temperature, vaginal temperature, and body surface temperature. Data were collected during the morning and afternoon periods, allowing comparisons between breeds and time of day. The results showed differences in climatic parameters throughout the day, which directly affected the physiological responses of the animals, especially in the afternoon, when thermal load was higher. Despite these variations, the sheep maintained physiological parameters within values considered normal for the species, indicating good adaptability to the environmental conditions of the rainy season. Therefore, it is concluded that Dorper and White Dorper breeds present adequate adaptability to the climatic conditions of the Cariri region, provided that appropriate management practices are adopted to reduce heat stress and ensure animal welfare.