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*Corresponding author: VD Domple; E-mail: vijaydomple@gmail.com
A study was undertaken to investigate the effect of melatonin supplementation on physiological parameters in buffalo calves under summer stress. Twelve healthy Murrah buffalo male calves of 6 month to 1 year age group were taken for the study. Buffalo calves were divided into control (CG) and treatment (TG) group. In TG, Melatonin (18 mg/50 kg BW) was injected subcutaneously, two times at 1st and 20th day. Rectal temperature (RT) (°F), respiratory rate (RR) (breathes per minute) and pulse rate (PR) (beats per minute) was recorded by a clinical thermometer, flank movement and by palpating the coccygeal artery respectively. RT, RR and PR differed significantly (P<0.05) in CG and TG between morning and afternoon. RT, RR & PR were increased significantly (P<0.05) from morning to afternoon in both the groups. During afternoon the rectal temperature was significantly (P<0.05) lower in treatment group. In conclusion, melatonin affected the fluctuation in physiological activity.
HIGHLIGHTS
RT, RR and PR differed significantly (P<0.05) in control and melatonin injected groups between morning and afternoon.
Injection of melatonin significantly (P<0.05) lowered rectal temperature in buffalo calves.
Melatonin, Physiological observations, Buffalo calves, Summer stress