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

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dc.contributor.authorCosta, Daniel Pen_ZA
dc.contributor.authorRobinson, Patrick Wen_ZA
dc.contributor.authorArnould, John P Yen_ZA
dc.contributor.authorHarrison, Autumn-Lynnen_ZA
dc.contributor.authorSimmons, Samantha Een_ZA
dc.contributor.authorHassrick, Jason Len_ZA
dc.contributor.authorHoskins, Andrew Jen_ZA
dc.contributor.authorKirkman, Stephen Pen_ZA
dc.contributor.authorOosthuizen, Hermanen_ZA
dc.contributor.authorVillegas-Amtmann, Stellaen_ZA
dc.date.accessioned2015-12-28T06:49:34Z
dc.date.available2015-12-28T06:49:34Z
dc.date.issued2010en_ZA
dc.description.abstractBACKGROUND: 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 68 th 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.en_ZA
dc.identifier.apacitationCosta, D. P., Robinson, P. W., Arnould, J. P. Y., Harrison, A., Simmons, S. E., Hassrick, J. L., ... Villegas-Amtmann, S. (2010). Accuracy of ARGOS locations of pinnipeds at-sea estimated using Fastloc GPS. <i>PLoS One</i>, http://hdl.handle.net/11427/16060en_ZA
dc.identifier.chicagocitationCosta, Daniel P, Patrick W Robinson, John P Y Arnould, Autumn-Lynn Harrison, Samantha E Simmons, Jason L Hassrick, Andrew J Hoskins, Stephen P Kirkman, Herman Oosthuizen, and Stella Villegas-Amtmann "Accuracy of ARGOS locations of pinnipeds at-sea estimated using Fastloc GPS." <i>PLoS One</i> (2010) http://hdl.handle.net/11427/16060en_ZA
dc.identifier.citationCosta, D. P., Robinson, P. W., Arnould, J. P., Harrison, A. L., Simmons, S. E., Hassrick, J. L., ... & Crocker, D. E. (2010). Accuracy of ARGOS locations of pinnipeds at-sea estimated using Fastloc GPS. PloS one, 5(1), e8677. doi:10.1371/journal.pone.0008677en_ZA
dc.identifier.ris TY - Journal Article AU - Costa, Daniel P AU - Robinson, Patrick W AU - Arnould, John P Y AU - Harrison, Autumn-Lynn AU - Simmons, Samantha E AU - Hassrick, Jason L AU - Hoskins, Andrew J AU - Kirkman, Stephen P AU - Oosthuizen, Herman AU - Villegas-Amtmann, Stella AB - 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 68 th 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. DA - 2010 DB - OpenUCT DO - 10.1371/journal.pone.0008677 DP - University of Cape Town J1 - PLoS One LK - https://open.uct.ac.za PB - University of Cape Town PY - 2010 T1 - Accuracy of ARGOS locations of pinnipeds at-sea estimated using Fastloc GPS TI - Accuracy of ARGOS locations of pinnipeds at-sea estimated using Fastloc GPS UR - http://hdl.handle.net/11427/16060 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/16060
dc.identifier.urihttp://dx.doi.org/10.1371/journal.pone.0008677
dc.identifier.vancouvercitationCosta DP, Robinson PW, Arnould JPY, Harrison A, Simmons SE, Hassrick JL, et al. Accuracy of ARGOS locations of pinnipeds at-sea estimated using Fastloc GPS. PLoS One. 2010; http://hdl.handle.net/11427/16060.en_ZA
dc.language.isoengen_ZA
dc.publisherPublic Library of Scienceen_ZA
dc.publisher.departmentAnimal Demography Unit (ADU)en_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.rightsThis 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.en_ZA
dc.rights.holder© 2010 Costa et alen_ZA
dc.rights.urihttp://creativecommons.org/licenses/by/4.0en_ZA
dc.sourcePLoS Oneen_ZA
dc.source.urihttp://journals.plos.org/plosoneen_ZA
dc.subject.otherSealsen_ZA
dc.subject.otherSea lionsen_ZA
dc.subject.otherAnimal behavioren_ZA
dc.subject.otherLatitudeen_ZA
dc.subject.otherLongitudeen_ZA
dc.subject.otherAnimal migrationen_ZA
dc.subject.otherForagingen_ZA
dc.subject.otherMarine geologyen_ZA
dc.titleAccuracy of ARGOS locations of pinnipeds at-sea estimated using Fastloc GPSen_ZA
dc.typeJournal Articleen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceArticleen_ZA
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