Volume: 55 Issue: 1
Year: 2024, Page: 135-141, Doi: https://doi.org/10.51966/jvas.2024.55.1.135-141
Received: Oct. 12, 2023 Published: March 31, 2024
A study was performed to investigate the impact of heat stress on milk composition and fatty acid profile in crossbred and Vechur cattle. The study was organized in two periods, period 1 with minimum Temperature Humidity Index (THI) (December 2022 to January 2023) and period 2 with maximum THI (March 2023 to April 2023). Six milk samples collected from lactating crossbred and Vechur cows were subjected to analysis. Milk composition analysis revealed no significant difference (p>0.05) between breeds and periods. The milk fatty acid analysis was accomplished using Gas chromatography-mass spectrometry (GC-MS). Six saturated, two monounsaturated and one polyunsaturated fatty acids were analysed. Among the analysed saturated fatty acids, the palmitic and caprylic acids showed a significant difference in milk samples of crossbred cattle with a surge in mean value during period 2 (p <0.05). However, in Vechur milk only stearic acid showed a significant difference with an increased mean in period 2. Monounsaturated fatty acids showed a significant difference in crossbred milk with an increased mean during period 2 (p <0.05). The only polyunsaturated fatty acid analysed in the work was linolenic acid. Compared to crossbred cattle, Vechur milk showed a decrease in the quantum of linolenic acid which is statistically significant (p <0.05) during period 2.
Keywords: Temperature Humidity Index, fatty acid, heat stress
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© 2024 Roshna et al. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Roshna K., Chinnu M.V., Uma R., Shynu M. and Beena V. 2024. Effect of heat stress on milk fatty acid profile in crossbred and vechur cattle. J. Vet. Anim. Sci. 55(1):135-141
DOI: https://doi.org/10.51966/jvas.2024.55.1.135-141