65/19 | Short Communication | Poultry Science

Effect of Thermal Conditioning on Physiological Response of Native Chicken

A.Varun, A.V. Omprakash, K. Kumanan, S. Vairamuthu and N. Karthikeyan

Department of Poultry Science, Madras Veterinary College, Chennai – 600 007, (TANUVAS), Tamil Nadu

Published in the Indian Veterinary Journal June 2019 : 96 (6) - pages 70 to 71
(Received: February, 2019, Accepted: March, 2019)


The present study was conducted to evaluate the effects of thermal conditioning on blood pH in native chicken Aseel (ASL), Naked Neck (NN) and its cross variety such as Aseel x Nandanam chicken-4 (ARW) and Naked neck x Nandanam broiler-3 (NNB3). Chicks from four varieties were divided into control (C; 28±1°C) and heat exposed (H; 39±1º C for 2 hours during 0-2 and 5-6 weeks of age). Chicks from H group (HE) and chicks from control group (CE) were exposed to 39±1°C for 4 hours daily on 12th week of age. On 14th, 42nd and 84th day, blood was withdrawn and pH was measured. On 14th and 42nd day, blood pH was signicantly (P<0.01) high in H group in all the four varieties. However, CE group chicks had signicantly (P<0.05) high blood pH (Respiratory alkalosis) on 84th day, compared to H group. Based on the results, it can be concluded that early thermal conditioning develops heat resistance in later part of life.

Key Words: Native chicken, Thermal Conditioning, Blood pH

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