Record Details

Molecular evidence for cryptic species among the Antarctic fish Trematomus bernacchii and Trematomus hansoni

DRS at CSIR-National Institute of Oceanography

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Title Molecular evidence for cryptic species among the Antarctic fish Trematomus bernacchii and Trematomus hansoni
 
Creator Bernardi, G.
Goswami, U.
 
Subject marine fish
protective behaviour
habitat selection
camouflage
colour
predation
natural selection
electrophoresis
phylogenetics
DNA
species diversity
Trematomus bernacchii
Trematomus hansoni
 
Description The 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.
 
Date 2009-01-12T08:45:57Z
2009-01-12T08:45:57Z
1997
 
Type Journal Article
 
Identifier Antarctic Science, Vol.9; 381-385p.
http://drs.nio.org/drs/handle/2264/2000
 
Language en
 
Rights Copyright [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.
 
Publisher Cambridge University Press