Extensive daily movement rates measured in territorial arctic foxes
Open Access
- 26 January 2021
- journal article
- research article
- Published by Wiley in Ecology and Evolution
- Vol. 11 (6), 2503-2514
- https://doi.org/10.1002/ece3.7165
Abstract
An animal's movement rate is a central metric of movement ecology as it correlates with its energy acquisition and expenditure. Obtaining accurate estimates of movement rate is challenging, especially in small highly mobile species where GPS battery size limits fix frequency, and geolocation technology limits positions’ precision. In this study, we used high GPS fix frequencies to evaluate movement rates in eight territorial arctic foxes on Bylot Island (Nunavut, Canada) in July–August 2018. We also assessed the effects of fix interval and location error on estimated movement rates. We obtained 96 fox‐days of data with a fix interval of 4 min and 12 fox‐days with an interval of 30 s. We subsampled the latter dataset to simulate six longer fix intervals ranging from 1 to 60 min and estimated daily distances traveled by adding linear distances between successive locations. When estimated with a fix interval of 4 min, daily distances traveled by arctic foxes averaged 51.9 ± 11.7 km and reached 76.5 km. GPS location error averaged 11 m. Daily distances estimated at fix intervals longer than 4 min were greatly underestimated as fix intervals increased, because of linear estimation of tortuous movements. Conversely, daily distances estimated at fix intervals as small as 30 s were likely overestimated due to location error. To our knowledge, no other territorial terrestrial carnivore was shown to routinely travel daily distances as large as those observed here for arctic foxes. Our results generate new hypotheses and research directions regarding the foraging ecology of highly mobile predators. Furthermore, our empirical assessment of the effects of fix interval and location error on estimated movement rates can guide the design and interpretation of future studies on the movement ecology of small opportunistic foragers.Keywords
Funding Information
- Natural Sciences and Engineering Research Council of Canada (RGPIN‐2019‐05292)
- Université du Québec à Rimouski
- Université Laval
This publication has 77 references indexed in Scilit:
- The tundra food web of Bylot Island in a changing climate and the role of exchanges between ecosystemsÉcoscience, 2011
- Behavioral response races, predator–prey shell games, ecology of fear, and patch use of pumas and their ungulate preyEcology, 2010
- Resolving issues of imprecise and habitat-biased locations in ecological analyses using GPS telemetry dataPhilosophical Transactions Of The Royal Society B-Biological Sciences, 2010
- Building the bridge between animal movement and population dynamicsPhilosophical Transactions Of The Royal Society B-Biological Sciences, 2010
- Building a mechanistic understanding of predation with GPS-based movement dataPhilosophical Transactions Of The Royal Society B-Biological Sciences, 2010
- An emerging movement ecology paradigmProceedings of the National Academy of Sciences, 2008
- How Movement Properties Affect Prey Encounter Rates of Ambush versus Active Predators: A Comment on Scharf et al.The American Naturalist, 2008
- Sensitivity of species-distribution models to error, bias, and model design: An application to resource selection functions for woodland caribouEcological Modelling, 2008
- The package “adehabitat” for the R software: A tool for the analysis of space and habitat use by animalsEcological Modelling, 2006
- Dietary responses of arctic foxes Alopex lagopus to changing prey availability across an Arctic landscapeWildlife Biology, 2005