ASSESSMENT OF STRESS RESPONSE AND SUPPORTIVE ROLE OF VITAMIN E IN CROSSBRED FEMALE CALVES
Loading...
Date
2015
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
COLLEGE OF VETERINARY AND ANIMAL SCIENCES-MANNUTHY,THRISSUR
Abstract
A study was conducted to assess the heat stress responses and supportive role of
vitamin E in crossbred female calves using physiological, haematological,
biochemical and hormonal parameters during pre-monsoon, monsoon and post
monsoon seasons in Kerala. Fourteen calves were randomly selected, divided in
to two groups while treatment group was additionally supplemented with vitamin
E @ 5 mg/kg of body weight orally for 30 days in all the three seasons. The
highest value of ambient temperature (AT) and temperature-humidity index (THI)
was recorded in pre-monsoon while highest relative humidity (RH) was recorded
in monsoon. Respiratory rate (RR) was significantly (p<0.05) higher in pre
monsoon compared with monsoon and post-monsoon. Heart rate (HR) and pulse
rate was significantly (p<0.05) higher in pre-monsoon and monsoon than in post
monsoon. Rectal temperature (RT) did not differ significantly (p>0.05) between
seasons. Total erythrocyte count (TEC) was significantly lower in monsoon than
other seasons, while total leucocyte count (TLC), haemoglobin (Hb) and volume
of packed red cells (VPRC) showed no significant (p>0.05) difference between
seasons. Season had no significant (P>0.05) effect on cortisol, total protein,
albumin, globulin and albumin globulin ratio in contrary glucose and cholesterol
levels were significantly (p<0.05) higher in post-monsoon compared with other
seasons. Glutathione peroxidase (GSH-Px) was significantly (p<0.05) higher in
pre-monsoon compared with other seasons. Vitamin E had no effect on
physiological, haematological, biochemical and hormonal parameters studied
whereas significantly lower glutathione peroxidase (GSH-Px) was noticed in
supplemented group. From the study it may be concluded that the crossbred
calves have the adaptive capability to alter their physiological responses to
maintain their body temperature and vitamin E may be helpful to ameliorate heat
induced oxidative stress.
Description
Keywords
null