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COI variation in Scandinavian marine species of Tubificoides (Annelida: Clitellata: Tubificidae)

Published online by Cambridge University Press:  18 October 2007

Christer Erséus
Affiliation:
Department of Zoology, Göteborg University, Box 463, SE-405 30 Göteborg, Sweden
Sebastian Kvist
Affiliation:
Department of Zoology, Göteborg University, Box 463, SE-405 30 Göteborg, Sweden

Abstract

Intra- and interspecific variation in a 658 bp long part of the cytochrome c oxidase subunit 1 (COI) gene of the mitochondrial genome, i.e. a suggested ‘DNA barcode’, was assessed in four north-west European species of the marine tubificid genus Tubificoides: T. benedii, T. amplivasatus, T. heterochaetus and T. kozloffi. Within species mean genetic distance was from 0.10% (T. amplivasatus) to 0.14% (T. benedii), between species from 19.3% to 22.9%. For T. benedii and T. amplivasatus, material collected in two separate areas, The Sound between Denmark and Sweden, and the Koster area about 330 km to the north along the Swedish west coast, showed a geographically random distribution of COI haplotypes, suggesting that each of these two species forms a continuous population in southern Scandinavia. We conclude that the COI gene is suitable as a barcode marker for the secure identification of these species, at least within the area investigated. Tubificoides heterochaetus is reported for the first time from Denmark.

Type
Research Article
Copyright
2007 Marine Biological Association of the United Kingdom

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