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dc.contributor.authorPaulsen, Ingrid M.
dc.contributor.authorPedersen, Åshild Ø
dc.contributor.authorHann, Richard
dc.contributor.authorBlanchet, Marie-Anne
dc.contributor.authorEischeid, Isabell
dc.contributor.authorvan Hazendonk, Charlotte Maartje
dc.contributor.authorRavolainen, Virve
dc.contributor.authorStien, Audun
dc.contributor.authorLe Moullec, Mathilde
dc.description.abstractConservation of wildlife depends on precise and unbiased knowledge on the abundance and distribution of species. It is challenging to choose appropriate methods to obtain a sufficiently high detectability and spatial coverage matching the species characteristics and spatiotemporal use of the landscape. In remote regions, such as in the Arctic, monitoring efforts are often resource-intensive and there is a need for cheap and precise alternative methods. Here, we compare an uncrewed aerial vehicle (UAV; quadcopter) pilot survey of the non-gregarious Svalbard reindeer to traditional population abundance surveys from ground and helicopter to investigate whether UAVs can be an efficient alternative technology. We found that the UAV survey underestimated reindeer abundance compared to the traditional abundance surveys when used at management relevant spatial scales. Observer variation in reindeer detection on UAV imagery was influenced by the RGB greenness index and mean blue channel. In future studies, we suggest testing long-range fixed-wing UAVs to increase the sample size of reindeer and area coverage and incorporate detection probability in animal density models from UAV imagery. In addition, we encourage focus on more efficient post-processing techniques, including automatic animal object identification with machine learning and analytical methods that account for uncertainties.en_US
dc.identifier.citationPaulsen IM, Pedersen ÅØ, Hann R, Blanchet ME, Eischeid I, van Hazendonk CM, Ravolainen V, Stien A, Le Moullec M. How Many Reindeer? UAV Surveys as an Alternative to Helicopter or Ground Surveys for Estimating Population Abundance in Open Landscapes. Remote Sensing. 2023;15(9)en_US
dc.identifier.cristinIDFRIDAID 2107909
dc.relation.journalRemote Sensing
dc.rights.holderCopyright 2022 The Author(s)en_US
dc.rightsAttribution 4.0 International (CC BY 4.0)en_US
dc.titleHow Many Reindeer? UAV Surveys as an Alternative to Helicopter or Ground Surveys for Estimating Population Abundance in Open Landscapesen_US
dc.typeJournal articleen_US
dc.typePeer revieweden_US

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Attribution 4.0 International (CC BY 4.0)
Med mindre det står noe annet, er denne innførselens lisens beskrevet som Attribution 4.0 International (CC BY 4.0)