ASSOCIATION OF TEMPERATURE HUMIDITY INDEX WITH PHYSIOLOGICAL, BIOCHEMICAL, AND BEHAVIOURAL RESPONSES IN NATIVE AND CROSSBRED GOATS
Loading...
![Thumbnail Image](assets/images/Item.jpg)
Date
2020-11-30
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
COLLEGE OF VETERINARY AND ANIMAL SCIENCES MANNUTHY, THRISSUR
Abstract
The present study was undertaken to investigate the association of temperature
humidity index with physiological, biochemical and behavioural responses in Malabari,
crossbred and Attappady goats of Kerala.
The research work was conducted at University Goat and Sheep Farm, KVASU,
Mannuthy, Thrissur district in Kerala from March to May, 2020. In-house temperature, in house relative humidity and physiological parameters were measured at 7.00 AM, 10.00
AM, 2.00 PM and 5.00 PM. Haematological, biochemical and endocrines parameters, blood
gases and electrolytes, were analysed during 2
nd, 32nd day and 60th day of the study. A
positive correlation was noticed between in-house temperature (IT) and temperature
humidity index (THI) with respiration rates, rectal temperatures, heart rate and skin
temperature levels of breeds at 2.00 PM and 5.00 PM. Alterations in physiological
parameters were more significant in Malabari goats. However a negative correlation was
observed between in-house relative humidity and all physiological parameters during all the
different times. Behavioural patterns were influenced by increased IT and THI and the
breeds spent more time in standing position during heat stress. No significant difference was
observed in haematological parameters in the breeds except in TLC levels which were
significantly increased during periods of heat stress. A significant difference was observed
within the study period in the pO2, Na+
, HCO3
-
and blood pH. A significant difference was
observed between the breeds for K
+
, Cl and HCO3
-
levels. No significant difference was
noticed for pCO2 level among the breeds and within the observed days. A significantly
higher glucose level on 32nd day and a lower total cholesterol level in the latter half of the
experimental period were noticed in Malabari and crossbred. Mean total protein levels of all
the breeds were significantly increased on 32
nd day. The albumin, globulin and A/G ratio
levels of all the breeds were within the range during the period of study. Increased GGT
levels were observed in the first half of the experimental period in all breeds. Higher cortisol
levels in Malabari and crossbred could be estimated in the first half of the experiment.
Although Malabari showed higher T3 levels on 32nd day compared to other breeds, within the breeds no significant difference in T3 levels could be noticed. However, significantly higher
T4 values were recorded on 32nd day and 60th day only in crossbred breeds when the IT and
THI were high.
Description
Submitted in partial fulfilment of the requirement for the degree of
MASTER OF VETERINARY SCIENCE inVeterinary Physiology