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dc.contributor.authorWeidberg, Nicholas
dc.contributor.authorDiBacco, Claudio
dc.contributor.authorPezzola, Caterina
dc.contributor.authorRebiffe, Etienne
dc.contributor.authorBasedow, Sünnje Linnéa
dc.date.accessioned2021-08-19T11:43:05Z
dc.date.available2021-08-19T11:43:05Z
dc.date.issued2021-04-29
dc.description.abstractCalanoid copepods dominate mesozooplankton communities in temperate and Nordic seas. The ability of copepods to remain and feed in productive surface waters depends on their ability to overcome downward flows. In this study, we assessed the swimming performance of subarctic Calanus spp. and tested how the copepods can retain their vertical position in a representative range of downward currents (between 0 and 5.4 cm s-1) simulated in a downwelling flume. Mean vertical and horizontal copepod swimming velocities and accelerations, movement periodicity and trajectory complexity were obtained by tracking individual trajectories in the field of view of 2 cameras. Copepod swimming velocity increased with increasing downward flow and matched downward flows up to 2 cm s-1. Beyond 2 cm s-1, animals were still able to significantly reduce their sinking rates, but their motions changed. Trajectories became simpler, swimming velocities changed on shorter time scales and instantaneous acceleration increased. These results are consistent with predictions of balancing depth retention against encounter rates with food and predators. Frequency distributions of vertical swimming speeds were mostly unimodal, with entire experimental populations responding in the same way. Coordination of movements and the ability to resist moderate downwelling flows can result in the accumulation of copepods in large surface swarms as observed in the field.en_US
dc.identifier.citationWeidberg N, DiBacco, Pezzola, Rebiffe, Basedow SL. Swimming performance of subarctic Calanus spp. facing downward currents . Marine Ecology Progress Series. 2021en_US
dc.identifier.cristinIDFRIDAID 1926992
dc.identifier.doi10.3354/meps13674
dc.identifier.issn0171-8630
dc.identifier.issn1616-1599
dc.identifier.urihttps://hdl.handle.net/10037/22142
dc.language.isoengen_US
dc.publisherInter Researchen_US
dc.relation.journalMarine Ecology Progress Series
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/MARINFORSK/ 268391/Norway/Sustainable harvesting of a patchy resource: aggregation mechanisms and implications for stock size estimates (Sea Patches)//en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2021 The Author(s)en_US
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480en_US
dc.titleSwimming performance of subarctic Calanus spp. facing downward currentsen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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