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dc.contributor.authorKettemer, Lisa Elena
dc.contributor.authorMul, Evert
dc.contributor.authorBlanchet, Marie-Anne
dc.contributor.authorRikardsen, Audun
dc.contributor.authorBiuw, Martin
dc.contributor.authorBroms, Fredrik Björn
dc.date.accessioned2022-05-31T07:39:28Z
dc.date.available2022-05-31T07:39:28Z
dc.date.issued2022-05-27
dc.description.abstractIn the northern hemisphere, humpback whales (<i>Megaptera novaeangliae</i>) typically migrate between summer/autumn feeding grounds at high latitudes, and specific winter/spring breeding grounds at low latitudes. Northeast Atlantic (NEA) humpback whales for instance forage in the Barents Sea and breed either in the West Indies, or the Cape Verde Islands, undertaking the longest recorded mammalian migration (~ 9 000 km). However, in the past decade hundreds of individuals have been observed foraging on herring during the winter in fjord systems along the northern Norwegian coast, with unknown consequences to their migration phenology, breeding behavior and energy budgets. Here we present the first complete migration track (321 days, January 8<sup>th</sup>, 2019—December 6<sup>th</sup>, 2019) of a humpback whale, a pregnant female that was equipped with a satellite tag in northern Norway. We show that whales can use foraging grounds in the NEA (Barents Sea, coastal Norway, and Iceland) sequentially within the same migration cycle, foraging in the Barents Sea in summer/fall and in coastal Norway and Iceland in winter. The migration speed was fast (1.6 ms<sup>-1</sup>), likely to account for the long migration distance (18 300 km) and long foraging season, but varied throughout the migration, presumably in response to the calf’s needs after its birth. The energetic cost of this migration was higher than for individuals belonging to other populations. Our results indicate that large whales can modulate their migration speed to balance foraging opportunities with migration phenology, even for the longest migrations and under the added constraint of reproduction.en_US
dc.identifier.citationKettemer, Mul, Blanchet, Rikardsen, Biuw, Broms. Round-trip migration and energy budget of a breeding female humpback whale in the Northeast Atlantic. PLOS ONE. 2022en_US
dc.identifier.cristinIDFRIDAID 2028014
dc.identifier.doi10.1371/journal.pone.0268355
dc.identifier.issn1932-6203
dc.identifier.urihttps://hdl.handle.net/10037/25320
dc.language.isoengen_US
dc.publisherPublic Library of Scienceen_US
dc.relation.ispartofKettemer, L.E. (2023). Migration Ecology of North Atlantic Humpback Whales: Mapping Movements throughout the Annual Cycle. (Doctoral thesis). <a href=https://hdl.handle.net/10037/31692>https://hdl.handle.net/10037/31692</a>.
dc.relation.journalPLOS ONE
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2022 The Author(s)en_US
dc.titleRound-trip migration and energy budget of a breeding female humpback whale in the Northeast Atlanticen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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