首页|Effect of heat wave on physiological responses, body surface temperature, heat load, and panting behaviour in buffalo heifers
Effect of heat wave on physiological responses, body surface temperature, heat load, and panting behaviour in buffalo heifers
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NETL
NSTL
Springer Nature
Abstract The present study was conducted to investigate the effect of heat wave on physiological responses and panting behaviour in buffalo heifers. The study was conducted in last fortnight of May when THI ranged between 78.42 and 88.84. The experiment was conducted on six apparently healthy buffalo heifers aged between 12 and 16 months that were maintained in well ventilated shed. The physiological parameters, body surface temperature (BST) (back, croup, neck, head, ear, eye and muzzle) and panting behaviour were recorded at 6 time points on day 1 and day 5 at 6 am, 10 am, 2 pm, 6 pm, 10 pm and next day 6 am and heat load (HL) was calculated. Respiratory rate (RR), rectal temperature (RT) and HL was significantly (p < 0.05) higher at 2 time points as compared to 6 am on day 1. However, RR increased significantly (p < 0.05) at 4 time points and RT and HL increased significantly (p < 0.05) at 3 times points on day 5 as compared to 6 am of the same day. RR, RT and HL were significantly (p < 0.05) higher at different time points on day 5 as compared to day 1. Both on day 1 and 5, BST at croup, neck and head were significantly (p < 0.05) higher at 4 time points whereas BST at back, ear and eye was higher (p < 0.05) only at 3 time points as compared to 6 am and next day 6 am. Except at 6 am and next day 6 am, BST was significantly (p < 0.05) higher at different time points on day 5 as compared to day 1, at different anatomical locations. Frequency and duration of panting were increased with progression of heat wave. The results indicated that physiological and behavioural heat loss mechanisms failed to maintain homeothermy, leading to substantial increase in heat load in buffalo heifers during heat wave.
NETL
NSTL
Springer Nature
