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Physiological responses of crossbred boer goats finished in native pasture in the semiarid

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Author(s): Bonifácio Benício de Souza | Anderson Luiz Nascimento da Silva | José Morais Pereira Filho | Nayanne Lopes Batista | Dermeval Araújo Furtado

Journal: Journal of Animal Behaviour and Biometeorology
ISSN 2318-1265

Volume: 1;
Issue: 2;
Start page: 37;
Date: 2013;
Original page

Keywords: adaptability | environmental parameters | physiological parameters

ABSTRACT
ArticlegrgrgrAbstract In this study, it was evaluated physiologicalresponses of crossbred Boer goats finished in native pasture.The experiment was carried out at experimental farm ofFederal University of Campina Grande (UFCG), Patos,Paraiba, Brazil. Were used Twenty-four goats with 120 daysof age. The animals were randomly assigned to according toa completely randomized design, being evaluated two shifts(morning and afternoon) with six replications (goats). It wererecorded environmental parameters ambient temperature(AT), relative humidity (RH) and wind velocity anddetermined humidity and black globe temperature index(HGTI) in the shade and in the sun and radiant thermalload(RTL) in the shade and in the sun. The physiologicparameters were evaluated according to the methodologydescribed by Santos et al. (2006) with measurements ofrectal temperature (RT), respiratory rate (RR) and skintemperature (ST). There was significant effect of shift of theenvironmental parameters with (HGTI) in the sun of 93.10and radiant thermal load (RTL) in the sun of 819.07 W.m-2.The period of the day affected the physiological responsesRT, RR and ST with averages values of 39.38 °C, 56.85mov/min and 34.30 °C, respectively. There was significanteffect in relation to the time of day on the physiologicparameters of goats Boer crossbreeds. The thermal gradientbetween rectal temperatures and superficial and between thesuperficial temperature and environmental is an indicator ofheat stress for goats studied.
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