Erythrocyte fragility based assessment of true thermal resilience in tropical small ruminants

True thermal resilience is the ability of an animal not only to withstand the challenges of temperature fluctuations but also to recover faster after the end of maximal stress. Six each of healthy, non-lactating, and non-pregnant sheep (Nellore breed) and goats (non-descript) of age between 1.5 and...

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Bibliographic Details
Published in:	Biological rhythm research Vol. 53; no. 2; pp. 234 - 245
Main Authors:	Reddy, P. Ravikanth, Kumar, B. Rajeev, Prasad, Ch.Srinivasa, Venkataseshiah, Ch, Hyder, Iqbal
Format:	Journal Article
Language:	English
Published:	Abingdon Taylor & Francis 01-02-2022 Taylor & Francis Ltd
Subjects:	erythrocyte osmotic fragility goat panting score Sheep Summer Thermoregulatory behavior welfare
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Summary:	True thermal resilience is the ability of an animal not only to withstand the challenges of temperature fluctuations but also to recover faster after the end of maximal stress. Six each of healthy, non-lactating, and non-pregnant sheep (Nellore breed) and goats (non-descript) of age between 1.5 and 2 years were selected from herds maintained in semi-intensive rearing system. The study was performed during three different times of the year i.e. pre-summer (February), peak summer (May) and post-summer/early monsoon (June). The panting scores were significantly increased in both sheep and goat during the summer season, with highest values recorded during the end of May. It was also observed that during the peak summer season Panting scores in sheep were significantly higher. In both sheep and goats, panting scores had shown significant positive correlation with Temperature Humidity Index (THI) and a significant negative correlation with wind velocity. With respect to osmotic fragility, there was a significant increase during the summer as compared to other seasons, with sheep having highest fragility than goats in all samplings except pre-summer. We conclude that erythrocyte osmotic fragility could be one of the potential measures of stress and subsequent physiological recovery in tropical small ruminants.
ISSN:	0929-1016 1744-4179
DOI:	10.1080/09291016.2019.1629087