Journal Article

Genetic evidence that the northern calamary, <i>Sepioteuthis lessoniana</i>, is a species complex in Australian waters

Lianos Triantafillos and Mark Adams

in ICES Journal of Marine Science

Published on behalf of ICES/CIEM

Volume 62, issue 8, pages 1665-1670
Published in print January 2005 | ISSN: 1054-3139
Published online January 2005 | e-ISSN: 1095-9289 | DOI: http://dx.doi.org/10.1016/j.icesjms.2005.06.004
Genetic evidence that the northern calamary, Sepioteuthis lessoniana, is a species complex in Australian waters

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Allozyme electrophoresis was used to investigate the taxonomic status of northern calamary Sepioteuthis lessoniana (Lesson 1830) from two sites in Shark Bay, Western Australia. Of the 40 squid examined at 38 presumptive loci, four individuals from the oceanic site were clearly differentiated from the rest by fixed allelic differences at four loci (Acp, Got2, Idh2, and PepD) and near-fixed differences at another three (Est, Ocdh, and 6Pgd). The genetic distances between these two groups of individuals (13% Fixed Differences and Nei, D (1978) = 0.178) were roughly twofold greater than those between the two cryptic taxa in the southern calamary S. australis, but are considerably smaller than those between the northern and southern calamary. The most likely explanation for these data is that S. lessoniana comprises two “cryptic” biological species in this region. Further studies are needed to delineate the total number of species found throughout Australasia for this important loliginid squid.

Keywords: allozyme electrophoresis; cryptic species; squid

Journal Article.  3188 words.  Illustrated.

Subjects: Environmental Science ; Marine and Estuarine Biology

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