Abstract
Evaporative cooling during late gestation period improves post-partum reproductive performance in Murrah buffaloes. To prove this hypothesis, sixteen pregnant dry Murrah buffaloes at sixty days pre-partum were selected and divided into two groups of eight animals each. Group 1 of buffaloes (Cooled/CL) was managed under fan and mist cooling during dry period, whereas second group of buffaloes (non-cooled/NCL) remained without the provision of cooling. After parturition, all the animals were managed under evaporative cooling till the end of experimental period. Reproductive performance in cooled (CL) and non-cooled (NCL) groups, respectively, viz. 1st and 2nd ovulation from calving (48.63±2.41, 69.25±2.34days and 57.75±3.35, 93.63±2.84days); calving to conception interval (117.88±4.21days and 117.88±4.21days); conception rate (87.5%±2.16% and 57%±2.26%); and follicular diameter at the time of 1st and 2nd ovulation (14.84±0.16, 15.75±0.13mm and 12.65±0.13, 13.35±0.11mm) varied significantly (p<.05). Total peak oestrogen concentration was significantly (p<.05) higher in cooled (26.7±1.32pg/ml) relative to non-cooled (20.7±1.22pg/ml) buffaloes. Time from onset of oestrus to ovulation varied significantly (p<.05) in cooled (32±2.22hr) and non-cooled (40±2.86hr) buffaloes. The peak progesterone concentration reached to (4.25ng/ml) in cooled group and (4.16ng/ml) in non-cooled group after first ovulation.
Published Version
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