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Accuracy of ARGOS locations of pinnipeds at-sea estimated using Fastloc GPS

Costa, Daniel P., Robinson, Patrick W., Arnould, John P. Y., Harrison, Autumn-Lynn, Simmons, Samantha E., Hassrick, Jason L., Hoskins, Andrew J., Kirkman, Stephen P., Oosthuizen, Herman, Villegas-Amtmann, Stella and Crocker, Daniel E. 2010, Accuracy of ARGOS locations of pinnipeds at-sea estimated using Fastloc GPS, PLoS One, vol. 5, no. 1, pp. 1-9.

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Title Accuracy of ARGOS locations of pinnipeds at-sea estimated using Fastloc GPS
Author(s) Costa, Daniel P.
Robinson, Patrick W.
Arnould, John P. Y.
Harrison, Autumn-Lynn
Simmons, Samantha E.
Hassrick, Jason L.
Hoskins, Andrew J.
Kirkman, Stephen P.
Oosthuizen, Herman
Villegas-Amtmann, Stella
Crocker, Daniel E.
Journal name PLoS One
Volume number 5
Issue number 1
Start page 1
End page 9
Total pages 9
Publisher Public Library of Science
Place of publication San Francisco, Calif.
Publication date 2010-01-15
ISSN 1932-6203
Summary Background: ARGOS satellite telemetry is one of the most widely used methods to track the movements of free-ranging marine and terrestrial animals and is fundamental to studies of foraging ecology, migratory behavior and habitat-use. ARGOS location estimates do not include complete error estimations, and for many marine organisms, the most commonly acquired locations (Location Class 0, A, B, or Z) are provided with no declared error estimate.
Methodology/Principal Findings: We compared the accuracy of ARGOS locations to those obtained using Fastloc GPS from the same electronic tags on five species of pinnipeds: 9 California sea lions (Zalophus californianus), 4 Galapagos sea lions (Zalophus wollebaeki), 6 Cape fur seals (Arctocephalus pusillus pusillus), 3 Australian fur seals (A. p. doriferus) and 5 northern elephant seals (Mirounga angustirostris). These species encompass a range of marine habitats (highly pelagic vs coastal), diving behaviors (mean dive durations 2–21 min) and range of latitudes (equator to temperate). A total of 7,318 ARGOS positions and 27,046 GPS positions were collected. Of these, 1,105 ARGOS positions were obtained within five minutes of a GPS position and were used for comparison. The 68th percentile ARGOS location errors as measured in this study were LC-3
0.49 km, LC-2 1.01 km, LC-1 1.20 km, LC-0 4.18 km, LC-A 6.19 km, LC-B 10.28 km.
Conclusions/Significance: The ARGOS errors measured here are greater than those provided by ARGOS, but within the range of other studies. The error was non-normally distributed with each LC highly right-skewed. Locations of species that make short duration dives and spend extended periods on the surface (sea lions and fur seals) had less error than species like elephant seals that spend more time underwater and have shorter surface intervals. Supplemental data (S1) are provided allowing the creation of density distributions that can be used in a variety of filtering algorithms to improve the quality of ARGOS tracking data.
Notes This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Language eng
Field of Research 060299 Ecology not elsewhere classified
060205 Marine and Estuarine Ecology (incl Marine Ichthyology)
Socio Economic Objective 960507 Ecosystem Assessment and Management of Marine Environments
HERDC Research category C1 Refereed article in a scholarly journal
HERDC collection year 2010
Copyright notice ©2010, Costa et al
Persistent URL http://hdl.handle.net/10536/DRO/DU:30031546

Document type: Journal Article
Collections: School of Life and Environmental Sciences
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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.