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dc.contributor.authorBasedow, Sünnje Linnéa
dc.contributor.authorTande, Kurt Steinar
dc.contributor.authorStige, Leif Christian
dc.date.accessioned2015-09-28T11:46:34Z
dc.date.available2015-09-28T11:46:34Z
dc.date.issued2010-10-14
dc.description.abstractFew studies have analysed the depth distribution of marine zooplankton at high-resolution, and knowledge obtained from theoretical modelling studies predominates over that from empirical field studies. We analysed depth selection by the marine copepod Calanus finmarchicus during spring and summer in neritic and oceanic Subarctic regions. Data on hydrography and zooplankton distribution in the upper 100 m were collected at high resolution by a towed instrument platform equipped with CTD, fluorometer and an optical plankton counter. Four extensive field data sets covering time windows from 3 to 11 d during the productive season were analysed using generalized additive mixed models. Our main findings were that: (1) mean depth of older development stages (CV and adults) of C. finmarchicus was best predicted by biotic factors (depth of the fluorescence maximum and population density), while abiotic factors (depth of the pycnocline) were of secondary importance, (2) depth selection was similar in neritic and oceanic areas, and (3) there was no evidence for synchronous diel vertical migration. Our results suggest that copepods dynamically and consistently select their habitat (depth) based on food conditions and predators in a density-dependent manner. We conclude that ecological interactions may drive habitat choice of planktonic organisms even in highly fluctuating oceanic environments.en_US
dc.identifier.citationMarine Ecology Progress Series 416(2010) s. 165-178en_US
dc.identifier.cristinIDFRIDAID 349746
dc.identifier.doi10.3354/meps08754
dc.identifier.issn0171-8630
dc.identifier.urihttps://hdl.handle.net/10037/8144
dc.identifier.urnURN:NBN:no-uit_munin_7725
dc.language.isoengen_US
dc.rights.accessRightsopenAccess
dc.subjectHabitat choiceen_US
dc.subjectDepth selectionen_US
dc.subjectOptical plankton counteren_US
dc.subjectGeneralized additive mixed modelen_US
dc.subjectGAMMen_US
dc.subjectCalanusen_US
dc.subjectDensity-dependenceen_US
dc.subjectSeasonalityen_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.titleHabitat selection by a marine copepod during the productive season in the Subarcticen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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