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dc.contributor.authorSvendsen, Fred Mariuseng
dc.date.accessioned2009-03-31T12:34:01Z
dc.date.available2009-03-31T12:34:01Z
dc.date.issued2009eng
dc.date.submitted2009-01-30eng
dc.identifier.urihttps://hdl.handle.net/1956/3216
dc.description.abstractSynaphobranchus eels are difficult to identify at species level. A literature study of previous taxonomic work on these species revealed several inconsistencies concerning the diagnostic characters of Synaphobranchus kaupii and Synaphobranchus affinis. One hundred and eleven specimens from the mid-Atlantic ridge and a type specimen of S. affinis were examined morphologically, and the DNA barcode region of the mitochondrial COI gene was sequenced from 60 of these specimens. The results of this examination showed an ontogenetic change in most morphometric characters and that most of the previously used diagnostic characters, namely dorsal fin origin in relation to the vent, predorsal length, scale shape and pattern, and dentition, cannot distinguish between the species S. kaupii and S. affinis. All the examined MAR-ECO specimens are in accordance with the original description of S. kaupii by Johnson (1862) and have a high number of vertebrae, hence all are identified as S. kaupii. The type specimen of S. affinis may represent a member of a cryptic species that closely resembles S. kaupii, separable by having a lower number of vertebrae, but a geographical expansion of this study is needed to resolve this taxonomic issue.en_US
dc.format.extent2894809 byteseng
dc.format.mimetypeapplication/pdfeng
dc.language.isoengeng
dc.publisherThe University of Bergenen_US
dc.subjectDNA-strekkodingnob
dc.subjectTaksonominob
dc.subjectAtlanterhavsryggennob
dc.titleMorphological and genetic variation in North Atlantic synaphobranchid eels in relation to species diagnosticsen_US
dc.typeMaster thesis
dc.rights.holderThe authoren_US
dc.rights.holderCopyright the author. All rights reserveden_US
dc.description.degreeMaster i Marin biodiversiteten_US
dc.description.localcodeMAMN-MARBI
dc.description.localcodeMARINDIV
dc.subject.realfagstermerhttps://data.ub.uio.no/realfagstermer/c009624
dc.subject.realfagstermerhttps://data.ub.uio.no/realfagstermer/c031781
dc.subject.realfagstermerhttps://data.ub.uio.no/realfagstermer/c032059
dc.subject.nus759906eng
dc.subject.nsiVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497nob
fs.subjectcodeMARINDIV


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