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Assessing the potential of camera traps for estimating activity pattern compared to collar-mounted activity sensors: a case study on Eurasian lynx Lynx lynx in south-eastern Norway
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Assessing the potential of camera traps for estimating activity pattern compared to collar-mounted activity sensors: a case study on Eurasian lynx Lynx lynx in south-eastern Norway
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Assessing the potential of camera traps for estimating activity pattern compared to collar-mounted activity sensors: a case study on Eurasian lynx Lynx lynx in south-eastern Norway
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Journal Article
Assessing the potential of camera traps for estimating activity pattern compared to collar-mounted activity sensors: a case study on Eurasian lynx Lynx lynx in south-eastern Norway
2025
Overview
The diel activity patterns of animals convey information about physiology, ecological niches and animal behaviour relevant for both applied conservation and more theoretical research. However, these patterns are challenging to study in the field. The current gold-standard approach to quantify movements and activity patterns of medium to large wildlife species is to use global positioning systems (GPS) collars equipped with activity sensors (e.g. accelerometers). A more recent approach consists of inferring activity patterns from the time-stamped pictures of wildlife obtained from camera traps now routinely used in wildlife monitoring projects. However, few studies have attempted to validate estimates of activity patterns obtained from camera traps against those obtained from activity sensors. In this study, we compared the diel activity pattern of the Eurasian lynx Lynx lynx inferred from detections by a network of over 300 camera traps active between 2010 and 2020, to activity patterns obtained from 18 GPS-collared lynx (8 females, 10 males) equipped with 2-axis accelerometer sensors, in the same area of southern Norway. Our results suggest that camera traps can be used to estimate diel activity curves that are comparable to those obtained from accelerometers. In our study, 75 detections were sufficient to approximate the diel activity pattern obtained from accelerometer. Subsampling indicated that a low number of detections results in a coarser approximation of the diel activity pattern. Accelerometer, activity pattern, camera trap, lynx lynx, methodology
