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dc.contributor.authorGurarie, Eliezer
dc.contributor.authorBengtson, John L
dc.contributor.authorBester, MN
dc.contributor.authorBlix, Arnoldus S
dc.contributor.authorCameron, Michael
dc.contributor.authorBornemann, Horst
dc.contributor.authorNordøy, Erling Sverre
dc.contributor.authorPlötz, Joachim
dc.contributor.authorSteinhage, Daniel
dc.contributor.authorBoveng, Peter
dc.date.accessioned2022-05-02T06:27:02Z
dc.date.available2022-05-02T06:27:02Z
dc.date.issued2016-09-09
dc.description.abstractThe Antarctic Pack Ice Seal (APIS) Program was initiated in 1994 to estimate the abundance of four species of Antarctic phocids: the crabeater seal Lobodon carcinophaga, Weddell seal Leptonychotes weddellii, Ross seal Ommatophoca rossii and leopard seal Hydrurga leptonyx and to identify ecological relationships and habitat use patterns. The Atlantic sector of the Southern Ocean (the eastern sector of the Weddell Sea) was surveyed by research teams from Germany, Norway and South Africa using a range of aerial methods over five austral summers between 1996–1997 and 2000–2001. We used these observations to model densities of seals in the area, taking into account haul-out probabilities, survey-specific sighting probabilities and covariates derived from satellite-based ice concentrations and bathymetry. These models predicted the total abundance over the area bounded by the surveys (30W and 10E). In this sector of the coast, we estimated seal abundances of: 514 (95 % CI 337–886) 9 10<sup>3</sup> crabeater seals, 60.0 (43.2–94.4) 9 10<sup>3</sup> Weddell seals and 13.2 (5.50–39.7) 9 10<sup>3</sup> leopard seals. The crabeater seal densities, approximately 14,000 seals per degree longitude, are similar to estimates obtained by surveys in the Pacific and Indian sectors by other APIS researchers. Very few Ross seals were observed (24 total), leading to a conservative estimate of 830 (119–2894) individuals over the study area. These results provide an important baseline against which to compare future changes in seal distribution and abundance.en_US
dc.identifier.citationGurarie E, Bengtson, Bester M, Blix as, Cameron, Bornemann, Nordøy ES, Plötz, Steinhage D, Boveng P. Distribution, density and abundance of Antarctic ice seals off Queen Maud Land and the eastern Weddell Sea. Polar Biology. 2017;40(5):1149-1165en_US
dc.identifier.cristinIDFRIDAID 1392811
dc.identifier.doi10.1007/s00300-016-2029-4
dc.identifier.issn0722-4060
dc.identifier.issn1432-2056
dc.identifier.urihttps://hdl.handle.net/10037/24961
dc.language.isoengen_US
dc.publisherSpringeren_US
dc.relation.journalPolar Biology
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2016 The Author(s)en_US
dc.titleDistribution, density and abundance of Antarctic ice seals off Queen Maud Land and the eastern Weddell Seaen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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