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dc.contributor.authorGabrielsen, Tove M
dc.contributor.authorMerkel, Benjamin
dc.contributor.authorSøreide, Janne
dc.contributor.authorJohansson-Karlsson, Emma
dc.contributor.authorBailey, Allison
dc.contributor.authorVogedes, Daniel Ludwig
dc.contributor.authorNygård, Henrik Andreas
dc.contributor.authorVarpe, Øystein
dc.contributor.authorBerge, Jørgen
dc.date.accessioned2013-03-13T10:30:18Z
dc.date.available2013-03-13T10:30:18Z
dc.date.issued2012
dc.description.abstractCalanoid copepods of the genus Calanus represent an important, nutrient-rich food source for a multitude of Arctic marine organisms. Although morphologically very similar, their life histories and ecological roles differ. Because the distribution of Calanus glacialis and C. finmarchicus corresponds to Arctic and Atlantic water masses, respectively, they are regularly used as climate indicators. A correct identification of these species is therefore necessary in many ecological, environmental and climatological studies. In this study, we aimed at validating the traditionally used morphological characteristics (combining prosome length and copepodite stage) for separation of species of Calanus by using molecular tools (PCR–RFLP of the 16S mtDNA). A total of 418 specimens of copepodite stages CIV, CV and CVI(af) from three Arctic fjords have been identified both morphologically and genetically. We find that the morphological identification systematically overestimates the abundance of C. finmarchicus at the expense of C. glacialis. Hence, parts of the C. glacialis populations are found to be structurally smaller and the within population size range thus larger than previously assumed. Consequently, using the traditional morphological species delimitation poses a serious problem in the use of these two species as indicators of Atlantic versus Arctic water masses and thus as climatic indicators. Furthermore, it obscures our understanding of the life history differences between the two species and of their relative importance as food for a number of ecologically and economically important species in the Arctic.en
dc.identifier.citationPolar Biology 35(2012) nr. 11 s. 1621-1628en
dc.identifier.cristinIDFRIDAID 974126
dc.identifier.doihttp://dx.doi.org/10.1007/s00300-012-1202-7
dc.identifier.issn0722-4060
dc.identifier.urihttps://hdl.handle.net/10037/4980
dc.identifier.urnURN:NBN:no-uit_munin_4733
dc.language.isoengen
dc.publisherSpringer Verlagen
dc.rights.accessRightsopenAccess
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480::Zoophysiology and comparative physiology: 483en
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Zoofysiologi og komparativ fysiologi: 483en
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488en
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecotoxicology: 489en
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488en
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økotoksikologi: 489en
dc.titlePotential misidentifications of two climate indicator species of the marine arctic ecosystem: Calanus glacialis and C. finmarchicusen
dc.typeJournal articleen
dc.typeTidsskriftartikkelen
dc.typePeer revieweden


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