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dc.contributor.advisorKristiansen, Svein
dc.contributor.authorAdjetey, Eric Teye
dc.date.accessioned2013-03-27T12:52:57Z
dc.date.accessioned2016-06-29T14:04:41Z
dc.date.available2016-06-29T14:04:41Z
dc.date.issued2009-05-15
dc.description.abstractFisheries management research is mostly centered on providing the needed knowledge about the fish stock in order to influence fishermen’s behavior at sea for stock sustainability. Management should also integrate knowledge acquired from primary producers (particularly phytoplankton) which form the foundations for fish production in implementing fishing controlling measures. Phytoplankton production therefore was studied in the Balsfjord from March to December in 2008. The study focused on nutrients as controlling factors. Water samples were collected at 5, 10 and 50 m from the Balsfjord from early March to early December. Nitrate, phosphate, silicate, Biogenic silica, chlorophyll a concentrations and phytoplankton abundance were analyzed throughout this sampling period. Seawater temperature and pH were also measured during sampling. The peak of the spring bloom occurred on 1st April at 5 and 10 m. Nitrate depletion and phosphate reduction occurred at 5, 10 and 50 m during summer and autumn while silicate showed major reduction during the spring bloom. Change in concentrations of silicate caused a shift in phytoplankton composition and abundance from diatoms to flagellates. The dominant phytoplankton genus and abundance was Chaetoceros during the spring bloom and flagellates after the bloom. Phytoplankton production in this fjord is controlled by nitrate.en_US
dc.format.extent534532 bytesen_US
dc.format.mimetypeapplication/pdfen_US
dc.identifier.urihttps://hdl.handle.net/10037/9347
dc.identifier.urnURN:NBN:no-uit_munin_8905
dc.language.isoengen_US
dc.publisherUniversitetet i Tromsøen_US
dc.publisherUniversity of Tromsøen_US
dc.rights.accessRightsopenAccess
dc.rights.holderCopyright 2009 The Author(s)
dc.subject.courseIDFSK-3910en_US
dc.subjectVDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920en_US
dc.subjectVDP::Agriculture and fishery disciplines: 900::Fisheries science: 920en_US
dc.subjectPhytoplanktonen_US
dc.subjectNitrateen_US
dc.subjectPhosphateen_US
dc.subjectSilicateen_US
dc.subjectBiogenic silicaen_US
dc.titleNutrients as controlling factors of phytoplankton. Production in the Balsfjord - Northern Norwayen_US
dc.typeMaster thesisen_US
dc.typeMastergradsoppgaveen_US


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