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dc.contributor.authorBernardi, G.
dc.contributor.authorGoswami, U.
dc.date.accessioned2009-01-12T08:45:57Z
dc.date.available2009-01-12T08:45:57Z
dc.date.issued1997
dc.identifier.citationAntarctic Science, Vol.9; 381-385p.
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/2000
dc.description.abstractThe notothenid species Trematomus bernacchii has previously been shown, by allozyme analysis, to be a complex of two cryptic species, one of which being more closely related to T. hansoni than to the other T. bernacchii cryptic species. Two T. bernacchii colour morphs, 'white blotch' and 'brown', at McMurdo Sound, may correspond to these cryptic species. In this study mitochondria1 DNA sequences of the 12s and 16s ribosomal regions is presented for six 'white blotch' morphs, eight 'brown' morphs collected in McMurdo Sound, one individual collected off the Antarctic Peninsula, and two T. hansoni individuals from McMurdo Sound. These sequences were compared with those of T. bernacchiiand T. hansoni in the literature. Based on 14 phylogenetically informative sequences, no differences were found between 'white blotch' and 'brown' morphs. Furthermore, only one substitution separated these sequences from the previously published T. hansoni sequence, while 10 substitutions separated them from the previously published T. bernacchii sequence. Misidentified specimens, and sequence misreadings may be at the origin of these discrepancies. However, the presence of cryptic species within T. bernacchii and T. hansoni is not ruled out.
dc.language.isoen
dc.publisherCambridge University Press
dc.rightsCopyright [1997]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
dc.subjectmarine fish
dc.subjectprotective behaviour
dc.subjecthabitat selection
dc.subjectcamouflage
dc.subjectcolour
dc.subjectpredation
dc.subjectnatural selection
dc.subjectelectrophoresis
dc.subjectphylogenetics
dc.subjectDNA
dc.subjectspecies diversity
dc.subjectTrematomus bernacchii
dc.subjectTrematomus hansoni
dc.titleMolecular evidence for cryptic species among the Antarctic fish Trematomus bernacchii and Trematomus hansoni
dc.typeJournal Article


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