Related Experiment Videos
Individually coded telemetry: a tool for studying heart rate and behaviour in reindeer calves
E Eloranta1, H Norberg, A Nilsson
1Department of Physiology, University of Oulu, Finland.
Acta Veterinaria Scandinavica
|February 5, 2003
Summary
The modified Polar Vantage NV reliably measures reindeer heart rate (HR) in cold conditions. This tool accurately captures circadian rhythms and behavior-related HR changes in reindeer calves.
Area of Science:
- Veterinary Medicine
- Animal Physiology
- Biomedical Engineering
Background:
- Accurate heart rate (HR) monitoring is crucial for understanding animal physiology and welfare.
- Assessing the performance of wearable HR monitors in challenging environmental conditions and diverse behaviors is essential for reliable data collection.
- Reindeer (Rangifer tarandus) physiology, particularly their heart rate patterns, remains an area requiring further detailed investigation.
Purpose of the Study:
- To evaluate the technical performance and accuracy of a silver wire-modified Polar Vantage NV (PVNV) heart rate monitor for use with reindeer calves.
- To measure and analyze heart rate (HR) patterns in captive reindeer calves under various behavioral conditions and across a 24-hour cycle.
- To validate the suitability of the PVNV as a reliable tool for non-invasive HR measurement in reindeer, even in natural environments.
Main Methods:
- Technical performance testing of the PVNV HR monitor in cold conditions (-30°C) using a pulse generator.
- Accuracy assessment by comparing PVNV HR readings with simultaneous electrocardiogram (ECG) measurements.
- Synchronized recording of reindeer calf behavior (focal individual observations) and HR data from the PVNV monitors.
Main Results:
- High correlation (r=0.9957) between generated pulse and PVNV values in cold conditions, indicating robust technical performance.
- Significant correlation (r=0.9965) between PVNV HR measurements and standard ECG, confirming high accuracy.
- Observed circadian rhythm in reindeer HR, with lowest rates at night/early morning and highest during the afternoon; average HR was 42.5 beats/min in February.
- Running behavior significantly elevated HR compared to other activities.
- Identified inter-individual differences in HR responses, reflecting unique physiological reactions.
Conclusions:
- The silver wire-modified Polar Vantage NV is a suitable and reliable tool for measuring heart rate in reindeer calves.
- The device accurately captures both circadian HR rhythms and activity-specific heart rate variations in reindeer.
- This technology enables precise, non-invasive physiological monitoring of reindeer in both laboratory and natural settings.