slugHeat tolerance in sheep with white and dark coat under heat stress
Journal Title: Journal of Animal Behaviour and Biometeorology - Year 2014, Vol 2, Issue 3
Abstract
The aim of this research was to evaluate heat tolerance of thirty crossbred sheep (Santa Ines with Dorper) with white and black coat under heat stress. The experiment was conducted in September and October of 2012 and a completely randomized design was used. Before and after one hour exposure to solar radiation (14h00 - 15h00), rectal temperature, respiratory rate and surface temperature of the animals were measured. The Black Globe Temperature Humidity Index, the Heat Tolerance Index and the Heat Tolerance Coefficient were calculated. The values found for the Black Globe Temperature Humidity Index in the sun and in the shade were 89.08 and 82.81 respectively. Animals coat coloring did not influence on their rectal temperature and there was no difference on the heat tolerance index. It was verified the effect of coat coloring on the respiratory rate in dark colored hair coat sheep (P < 0.05) and the effect of the environment and coat coloring on the surface temperature and on the heat tolerance coefficient under the sun. Dark colored hair coat sheep presented lower tolerance to heat.
Authors and Affiliations
Nayanne Lopes Batista ▪ Bonifácio Benicio de Souza ▪ Gabriel Jorge Carneiro de Oliveira ▪ João Vinícius Barbosa Roberto ▪ Rafael Pádua de Araújo ▪ Thaiz Lamy Alves Ribeiro ▪ Raíssa Almeida Silva
Keywords
Related Articles
- EP ID EP17879
- DOI http://dx.doi.org/10.14269/2318-1265/jabb.v2n3p102-108
- Views 507
- Downloads 22
slugDaily behavioral activities of bullfrog Lithobates catesbeianus (Shaw 1802)
Studies on the daily behavioral activities of bullfrogs in laboratories may indicate avenues for appropriate technical management for this specie culture. Twenty-four post-metamorphic phase Lithobates catesbeianus (S...
slugPossible heavy metal residues in poultry and their products that are bred around cement industry
Industry is an efficient tool for industrial development that is present in human lives and that mobilizes local and regional economies. When inspected from this aspect, industrial regions provide economic and social...
slugInfluence of lactation stage and interval between milkings on the milk composition and production of goats in the semi-arid
The objective of this research was evaluating the influence of lactation stage and the time interval between milkings on milk ingredients and the production of goats in the semi-arid region of Paraiba. It was used 28...
slugEvaluation of the physiological variables in Santa Inês sheep influence by the Piauí semi-arid environment
In this study we aimed to evaluate the physiological variables of sheep under the influence of Piauí semiarid environment. We used ten Santa Ines rams with black coat. The study was conducted at the small ruminants s...
slugPhysiological responses of crossbred boer goats finished in native pasture in the semiarid
In this study, it was evaluated physiological responses of crossbred Boer goats finished in native pasture. The experiment was carried out at experimental farm of Federal University of Campina Grande (UFCG), Patos, P...