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Phylogenetic relationships of a tube worm (Lamellibrachia juni) from three hydrothermal vent fields in the South Pacific

Published online by Cambridge University Press:  15 December 2006

Shigeaki Kojima
Affiliation:
Ocean Research Institute, University of Tokyo, Tokyo 164-8639, Japan
Hiromi Watanabe
Affiliation:
Ocean Research Institute, University of Tokyo, Tokyo 164-8639, Japan
Shinji Tsuchida
Affiliation:
Japan Agency for Marine–Earth Science and Technology, Kanagawa 237-0061, Japan
Katsunori Fujikura
Affiliation:
Japan Agency for Marine–Earth Science and Technology, Kanagawa 237-0061, Japan
Ashley A. Rowden
Affiliation:
National Institute of Water and Atmospheric Research Ltd, Private Bag 14-901, Kilbirnie,Wellington, New Zealand
Ken Takai
Affiliation:
Japan Agency for Marine–Earth Science and Technology, Kanagawa 237-0061, Japan
Tomoyuki Miura
Affiliation:
Miyazaki University, Faculty of Agriculture, Miyazaki University, Miyazaki 889-2192, Japan

Abstract

The phylogenetic relationships were analysed based on nucleotide sequences of a mitochondrial gene for cytochrome c oxidase subunit I (COI) for the vestimentiferan tube worm Lamellibrachia juni, which inhabits three extremely acidic hydrothermal vent fields in the South Pacific: the TOTO Caldera in the South Mariana Volcanic Arc, the DESMOS site in the Manus Basin, and the Brothers Caldera in the Kermadec Arc. Six haplotypes were obtained from 34 lamellibrachiids from the three sites. Each haplotype was obtained only from a single site, which suggests that the three populations have been isolated from each other. Haplotypes from the DESMOS site formed a monophyletic cluster. All ten individuals from the TOTO Caldera were classified into the same haplotype, which was shown to form a monophyletic cluster with one of three haplotypes from the Brothers Caldera. The population in the Brothers Caldera was shown to consist of two genetically distinct groups.

Type
Research Article
Copyright
2006 Marine Biological Association of the United Kingdom

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