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dc.contributor.advisorBasedow, Sünnje Linnéa
dc.contributor.advisorGeoffroy, Maxime
dc.contributor.authorSantana Hernández, Néstor
dc.date.accessioned2019-09-17T12:50:04Z
dc.date.available2019-09-17T12:50:04Z
dc.date.issued2019-05-16
dc.description.abstractZooplankton patchiness has been documented in many shelf areas and is of vital importance for understanding predator-prey relationships in pelagic marine systems. By combining hydrographic, acoustic and net data collected in spring 2017, we present a detailed understanding of the extent of this phenomenon in the Lofoten-Vesterålen region. Such patches are of potential interest not only for zooplankton harvesting, but also for commercially harvested species such as Atlantic Cod, which are crucial for the region’s economy. We hereby report evidences of a large surface patch (>1000 km2) of Calanus finmarchicus extending longitudinally over the whole continental shelf. The aggregation was closely tied to the water mass distribution in the area together with the timing of the bloom and its associated ascent of the overwintering copepod population. Although most organisms concentrated at surface, species-specific depth preferences resulted in statistically definite communities at diverse depths. Despite the low chlorophyll a values, high nutrient concentrations proved optimum conditions for phytoplankton development and significantly matched with the zooplankton distribution. We thus hypothesize that top-down control via intensive grazing pressure plays a significant role in regulating both the bloom’s size and the related surface aggregation of zooplankton. This paper will assess the dimentions, morphology and composition together with possible physical and biological drivers of zooplankton patches to provide a highly comprehensive view of the distribution of this copepod, its aggregating behaviour and its ecological importance.en_US
dc.identifier.urihttps://hdl.handle.net/10037/16213
dc.language.isoengen_US
dc.publisherUiT Norges arktiske universiteten_US
dc.publisherUiT The Arctic University of Norwayen_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2019 The Author(s)
dc.rights.urihttps://creativecommons.org/licenses/by-nc-sa/4.0en_US
dc.rightsAttribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)en_US
dc.subject.courseIDBIO-3950
dc.subjectCalanus finmarchicusen_US
dc.subjectLofoten-Vesterålenen_US
dc.subjectzooplankton patchinessen_US
dc.subjectbioacousticsen_US
dc.subjectspring bloomen_US
dc.subjectNorwegian Coastal Currenten_US
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497en_US
dc.titleA patch of Calanus finmarchicus in the Lofoten-Vesterålen Region. Characteristics and determining factorsen_US
dc.typeMaster thesisen_US
dc.typeMastergradsoppgaveen_US


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Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)