SHORT COMMUNICATIONS
1. Response of crossbred cattle in terms of respiration rate and rectal temperature to maximum and minimum thi period in Kerala
N.V. Jisha, G. Girish Varma, V. Beena, A. Prasad, V.L. Gleeja, K. Karthiayini and V. Sejian
Journal of Veterinary and Animal Sciences.2020. 51(2):214-216.
Author Details
N.V. Jisha: PhD Scholar, Centre for Animal Adaptation to Environment and Climate Change Studies (CAADECCS), College of Veterinary and Animal Sciences, Mannuthy, Kerala Veterinary and Animal Sciences University, Kerala, India.
G. Girish Varma: Dean, College of Avian Science and Management, Thiruvazhamkunnu, Kerala Veterinary and Animal Sciences University, Kerala, India.
V. Beena: Assistant Professor and Implementing officer, Centre for Animal Adaptation to Environment and Climate Change Studies (CAADECCS),College of Veterinary and Animal Sciences, Mannuthy, Kerala Veterinary and Animal Sciences University, Kerala, India.
A. Prasad: Assistant Professor, Department of Livestock Production and Management, College of Veterinary and Animal Sciences, Mannuthy, Kerala Veterinary and Animal Sciences University, Kerala, India.
V.L. Gleeja: Assistant Professor, Department of Statistics, College of Veterinary and Animal Sciences, Mannuthy, Kerala Veterinary and Animal Sciences University, Kerala, India.
K. Karthiayini: Professor and Head, Department of Veterinary Physiology, College of Veterinary and Animal Sciences, Pookode, Kerala Veterinary and Animal Sciences University, Kerala, India.
V. Sejian:Senior Scientist, NIANP, Bangalore
Article History
Received: 21.11.2019, Accepted: 04.01.2020, Published online: 01.07.2020
Corrersponding author: G. Girish Varma
e-mail: girish@kvasu.ac.in
Citation: Jisha, N.V., Girish, V.G., Beena, V., Prasad, A., Gleeja, V.L., Karthiayini, K. and Sejian, V. 2020. Response of crossbred cattle in terms of respiration rate and rectal temperature to maximum and minimum THI period in Kerala. J. Vet. Anim. Sci. 51(2): 214-216.
Abstract
The observation indicated that from THI 82 to 86 the body of the animal could maintain body temperature by physiological means of thermoregulation primarily by increasing respiration. Rectal temperature showed a positive correlation when THI reaches 86 and rectal temperature started increasing at ambient temperature of 340C and THI 86. But beyond 86 all these mechanisms failed and body temperature started rising. The relative humidity affects evaporative cooling negatively when it cross limit. This limit is very important to adopt management practices and could be identified by doing experiments at different RH levels using a climate chamber. The absence of correlation between THI and AH is also pointing to the fact that temperature and humidity affect the evaporative mechanism independently.
Keywords: Response, THI period, Crossbred cattle
