Revealing the diversity of internal body temperature and panting response for feedlot cattle under environmental thermal stress
Abstract Core body temperature (CBT) regulation is crucial for mammalian wellbeing and survival. Cattle pant to dissipate excess heat to regulate CBT when ambient conditions exceed thermoneutral zones. However, to date, neither the variability in cattle heat response, the lagged response of CBT to t...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-03-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-023-31801-7 |
| _version_ | 1797859938498772992 |
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| author | M. A. Islam S. Lomax A. K. Doughty M. R. Islam P. C. Thomson C. E. F. Clark |
| author_facet | M. A. Islam S. Lomax A. K. Doughty M. R. Islam P. C. Thomson C. E. F. Clark |
| author_sort | M. A. Islam |
| collection | DOAJ |
| description | Abstract Core body temperature (CBT) regulation is crucial for mammalian wellbeing and survival. Cattle pant to dissipate excess heat to regulate CBT when ambient conditions exceed thermoneutral zones. However, to date, neither the variability in cattle heat response, the lagged response of CBT to thermal indices, nor the diurnal patterns of thermal indices, CBT and panting have been reported in the literature. We decomposed thermal indices, CBT and panting time-series data for 99 feedlot heifers across three discrete heat events into diurnal, trend and residual components. Both raw and decomposed data were analysed to explore the lagged CBT and panting responses and the association between series. We show ambient thermal conditions impact CBT with a 1-h lag despite a lag of between 1.5 to 3 h from raw data. Average individual panting scores were used to identify heat-susceptible and heat-tolerant cattle. Heat-susceptible cattle showed greater CBT (P < 0.01) between 8:00 and 23:00 and greater panting duration (P < 0.05) between 10:00 and 18:00 than heat-tolerant cattle under the same thermal conditions and these variations followed a similar pattern despite differences in cattle breed. This new information enables targeted amelioration and selection of individuals against heat susceptibility. |
| first_indexed | 2024-04-09T21:37:39Z |
| format | Article |
| id | doaj.art-2a2b5564417942629c5ae0437aac289f |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-09T21:37:39Z |
| publishDate | 2023-03-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-2a2b5564417942629c5ae0437aac289f2023-03-26T11:10:47ZengNature PortfolioScientific Reports2045-23222023-03-0113111210.1038/s41598-023-31801-7Revealing the diversity of internal body temperature and panting response for feedlot cattle under environmental thermal stressM. A. Islam0S. Lomax1A. K. Doughty2M. R. Islam3P. C. Thomson4C. E. F. Clark5Livestock Production and Welfare Group, School of Life and Environmental Sciences, Sydney Institute of Agriculture, University of SydneyLivestock Production and Welfare Group, School of Life and Environmental Sciences, Sydney Institute of Agriculture, University of SydneyAllflex Livestock Intelligence, Allflex Australia Pty Ltd.Livestock Production and Welfare Group, School of Life and Environmental Sciences, Sydney Institute of Agriculture, University of SydneySydney School of Veterinary Science, University of SydneyLivestock Production and Welfare Group, School of Life and Environmental Sciences, Sydney Institute of Agriculture, University of SydneyAbstract Core body temperature (CBT) regulation is crucial for mammalian wellbeing and survival. Cattle pant to dissipate excess heat to regulate CBT when ambient conditions exceed thermoneutral zones. However, to date, neither the variability in cattle heat response, the lagged response of CBT to thermal indices, nor the diurnal patterns of thermal indices, CBT and panting have been reported in the literature. We decomposed thermal indices, CBT and panting time-series data for 99 feedlot heifers across three discrete heat events into diurnal, trend and residual components. Both raw and decomposed data were analysed to explore the lagged CBT and panting responses and the association between series. We show ambient thermal conditions impact CBT with a 1-h lag despite a lag of between 1.5 to 3 h from raw data. Average individual panting scores were used to identify heat-susceptible and heat-tolerant cattle. Heat-susceptible cattle showed greater CBT (P < 0.01) between 8:00 and 23:00 and greater panting duration (P < 0.05) between 10:00 and 18:00 than heat-tolerant cattle under the same thermal conditions and these variations followed a similar pattern despite differences in cattle breed. This new information enables targeted amelioration and selection of individuals against heat susceptibility.https://doi.org/10.1038/s41598-023-31801-7 |
| spellingShingle | M. A. Islam S. Lomax A. K. Doughty M. R. Islam P. C. Thomson C. E. F. Clark Revealing the diversity of internal body temperature and panting response for feedlot cattle under environmental thermal stress Scientific Reports |
| title | Revealing the diversity of internal body temperature and panting response for feedlot cattle under environmental thermal stress |
| title_full | Revealing the diversity of internal body temperature and panting response for feedlot cattle under environmental thermal stress |
| title_fullStr | Revealing the diversity of internal body temperature and panting response for feedlot cattle under environmental thermal stress |
| title_full_unstemmed | Revealing the diversity of internal body temperature and panting response for feedlot cattle under environmental thermal stress |
| title_short | Revealing the diversity of internal body temperature and panting response for feedlot cattle under environmental thermal stress |
| title_sort | revealing the diversity of internal body temperature and panting response for feedlot cattle under environmental thermal stress |
| url | https://doi.org/10.1038/s41598-023-31801-7 |
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