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The purpose of study was the evaluation of different types of measurers /surface temperature and heat flux intensity measurers/, especially detectors connected to apparatuses, to determine the usefulness for the studies on the thermoregulation processes in animals. Besides of testing of devices, the selection of measurement sites on the surface of animals, which could be the most accurate for the demonstration of thermal variations, was done. The study included the manner of data collection, like the way of the detectors placement on the surface of body, the proper time needed to take the readings, results repetition and the methods of animal restriction.
The study concerned the development of thermoregulation in calves at age of 1 to 50 days of life. Rectal temperature /tr/, skin temperature at thermostable /ts/ and thermolabile /tl/ sites and heat flux /Q/ at these points were measured. At the same time, microclimatic conditions of barn /t, e, f, V, H/, were controlled. One concluded some independence of rectal temperature from the age of animals and slight relationship between tr and skin temperature. Together with the animal growth, skin temperature at thermostable points increased, whereas at thermolabile sites decreased. Moreover, decreasing correlation between skin temperature and cooling factor was demonstrated, what can suggest the development of thermoregulatory abilities in calves. Heat flux was markedly correlated with skin temperature.
The results of previous studies indicate the possibility of determining the impact of training on the body surface temperature of horses. The study was aimed at identifying the usefulness of thermography in monitoring the annual training cycle of racehorses. The study involved 64 clinically healthy racehorses trained for flat racing in seasons 2011 and 2012. The study was based on the measurements of the body surface temperature of the lower parts of forelimbs and back in 13 sessions in each training season of 10 months. On 3,328 thermographic images, 24 regions of interest (ROI) were selected. In each ROI the average temperature was calculated (Tavg °C). The surface temperature of the distal parts of forelimbs and the back measured at rest increased with each session, which was related to the duration of the training cycle. The thermographic diagnosis was useful in monitoring the changes in the body surface temperature during a training cycle and in detecting injuries caused by training overloads.
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