Produção Nacional
Revisado por pares
Effects of the dry and the rainy season on endocrine and physiologic profiles of goats in the Brazilian semi-arid region
2017; Taylor & Francis; Volume: 17; Issue: 2 Linguagem: Inglês
10.1080/1828051x.2017.1393320
ISSN1828-051X
AutoresNeila Lidiany Ribeiro, Roberto Germano Costa, Edgard Cavalcanti Pimenta Filho, Maria Norma Ribeiro, Riccardo Bozzi,
Tópico(s)Animal Behavior and Welfare Studies
ResumoThis study investigated the effect of season on the endocrine and adaptive profiles of a Brazilian Creole goat population in a semi-arid region of Brazil during the dry and the rainy season. We considered physiological, morphological, biochemical, haematological, hormonal and anatomical profiles. The experiment used 80 adult goats (2- to 5-year-old) and lactating (160 ± 14 days of lactation length) goats, with an average daily milk yield of 500.9 ± 13 g. Physiological parameters (rectal temperature, RT; respiratory rate, RR; heart rate, HR; skin temperature, ST) were high (p < .05) in the afternoon in both seasons. There was a significant effect of season (p < .05) on anatomical parameters (hair diameter, HD; hair length, HL; coat thickness, CT). Haematological, biochemical and hormonal parameters were also significantly affected by season (p < .05). We measured the biochemical and hormonal characteristics changes during different seasons; metabolism was reduced during heat stress and accelerated during cold stress. These hormones facilitate the physiological parameters involved in the adaptation process. Our results confirm that the adaptive capacity of the animals cannot be described solely by RT and RR.
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