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dc.contributor.authorJohn Elling Deehr, Johannessen
dc.contributor.authorBiuw, Martin
dc.contributor.authorLindstrøm, Ulf Ove
dc.contributor.authorOllus, Victoria Marja Sofia
dc.contributor.authorMartín López, Lucía Martina
dc.contributor.authorGkikopoulou, Kalliopi C.
dc.contributor.authorOosthuizen, Wessel Chris
dc.contributor.authorLowther, Andrew
dc.date.accessioned2022-05-13T08:59:20Z
dc.date.available2022-05-13T08:59:20Z
dc.date.issued2022-02-09
dc.description.abstractFine-scale knowledge of spatiotemporal dynamics in cetacean distribution and abundance throughout the Western Antarctic Peninsula (WAP) is sparse yet essential for effective ecosystem-based management (EBM). Cruise vessels were used as platforms of opportunity to collect data on the distribution and abundance of humpback whales (Megaptera novaeangliae) during the austral summer of 2019/2020 in a region that is also important for the Antarctic krill (Euphausia superba) fishery, to assess potential spatiotemporal interactions for future use in EBM. Data were analyzed using traditional design-based line transect methodology and spatial density surface hurdle models fitted using a set of physical environmental covariates to estimate the abundance and distribution of whales in the area, and to describe their temporal dynamics. Our results indicate a rapid increase in humpback whale abundance in the Bransfield and Gerlache Straits through December, reaching a stable abundance by mid-January. The distribution of humpback whales appeared to change from a patchier distribution in the northern Gerlache Strait to a significantly concentrated presence in the central Gerlache and southern Bransfield Straits, followed by a subsequent dispersion throughout the area. Abundance estimates agreed well with previous literature, increasing from approximately 7000 individuals in 2000 to a peak of 19,107 in 2020. Based on these estimates, we project a total krill consumption of between 1.4 and 3.7 million tons based on traditional and contemporary literature on per capita krill consumption of whales, respectively. When taken in the context of krill fishery catch data in the study area, we conclude that there is minimal spatiotemporal overlap between humpback whales and fishery activity during our study period of November– January. However, there is potential for significant interaction between the two later in the feeding season, but cetacean survey efforts need to be extended into late season in order to fully characterize this potential overlap.en_US
dc.identifier.citationJohn Elling Deehr, Biuw, Lindstrøm, Ollus, Martín López, Gkikopoulou, Oosthuizen, Lowther. Intra-season variations in distribution and abundance of humpback whales in the West Antarctic Peninsula using cruise vessels as opportunistic platforms. Ecology and Evolution. 2022;12(2)en_US
dc.identifier.cristinIDFRIDAID 2021443
dc.identifier.doi10.1002/ece3.8571
dc.identifier.issn2045-7758
dc.identifier.urihttps://hdl.handle.net/10037/25116
dc.language.isoengen_US
dc.publisherWileyen_US
dc.relation.journalEcology and Evolution
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2022 The Author(s)en_US
dc.titleIntra-season variations in distribution and abundance of humpback whales in the West Antarctic Peninsula using cruise vessels as opportunistic platformsen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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