Relationship between maximum eye temperature and plasma cortisol concentration in racehorses during intensive training
To determine the utility of maximum eye temperature measured by infrared thermography as a stress indicator in racehorses
The aim of the study was to determine the utility of maximum eye temperature measured by infrared thermography (IRT) as a stress indicator compared with plasma cortisol concentration in Thoroughbred and Arabian racehorses. The study included thirty racehorses undergoing standard training for racing. Measurements of maximum eye temperature and blood collection for plasma cortisol concentration were carried out before training (BT), and within 5 (5AT) and 120 minutes (120AT) after the end of the each training session in three repetitions, with a monthly interval. Both parameters were elevated at 5AT compared to BT (p⟨0.001). Compared to BT, at 120AT the maximum eye temperature remained elevated (p⟨0.001) and plasma cortisol concentration decreased (p⟨0.001). The study indicated significant weak correlations (r=0.220; p⟨0.001) between both measurements at all time points. The results support the use of IRT technique to monitor the response of horses to stress, potentially improving animal management and welfare.
“Relationship between maximum eye temperature and plasma cortisol concentration in racehorses during intensive training” M Soroko,et al. Pol J Vet Sci. 2021 Sep;24(3):393-397. doi: 10.24425/pjvs.2021.138730.
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