Abstract
Automated behavioural observations are routinely used in many fields of biology, including ethology, behavioural ecology and physiology. When preferences for certain resources are investigated, the focus is often on simple response variables, such as duration and frequency of visits to choice chambers. Here we present an automated motion detector system that use passive infrared sensors to eliminate many drawbacks of currently existing methods. Signals from the sensors are processed by a custom-built interface, and after unnecessary data is filtered by a computer software, the total time and frequency of the subject’s visits to each of the choice chambers are calculated. We validate the detector system by monitoring (using the system) and in the same time video recording mating preferences of zebra finches in a four-way choice apparatus. Manual scoring of the video recordings showed very high consistency with data from the detector system both for time and for frequency of visits. Furthermore, the validation revealed that if we used micro-switches or light barriers, the most commonly applied automatic detection techniques, this would have resulted in approximately 22% less information compared to our lossless system. The system provides a low-cost alternative for monitoring animal movements, and we discuss its further applicability.
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Acknowledgements
The research leading to these results has received funding from the European Community’s Sixth Framework Program (GEBACO, FP6/2002–2006, under contract no. 28696 and INCORE, FP6/2002–2006, under contract no. 43318). This research was also supported by the Hungarian Scientific Research Fund (OTKA 81953 and 109337). We are grateful to István Heszberger for insightful comments on designing the system and Róbert Enyedi for his assistance in building the mate choice apparatus. We thank an anonymous reviewer for comments on an earlier version of the manuscript.
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Pogány, Á., Heszberger, J., Szurovecz, Z. et al. An Infrared Motion Detector System for Lossless Real-Time Monitoring of Animal Preference Tests. BIOLOGIA FUTURA 65, 385–395 (2014). https://doi.org/10.1556/ABiol.65.2014.4.3
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DOI: https://doi.org/10.1556/ABiol.65.2014.4.3