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北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University >
第57巻 第1/2号 >

Molecular Phylogenetic Analysis of Euphausia pacifica, Thysanoessa longipes and T. inermis (Crustacea : Euphausiacea) in the Subarctic Pacific Region, with Notes on Non-Geographical Genetic Variations for E. pacifica

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/32480

Title: Molecular Phylogenetic Analysis of Euphausia pacifica, Thysanoessa longipes and T. inermis (Crustacea : Euphausiacea) in the Subarctic Pacific Region, with Notes on Non-Geographical Genetic Variations for E. pacifica
Authors: Takahashi, Tomokazu Browse this author
Taniguchi, Marina Browse this author
Sawabe, Tomoo Browse this author
Christen, Richard Browse this author
Ikeda, Tsutomu Browse this author
Keywords: Euphausia pacifica
Thysanoessa inermis
Thysanoessa longipes
18S rDNA
16S rRNA
subarctic Pacific
population genetics
Issue Date: Nov-2006
Publisher: 北海道大学大学院水産科学研究院 = RESEARCH FACULTY OF FISHERIES SCIENCES, HOKKAIDO UNIVERSITY
Journal Title: 北海道大学水産科学研究彙報 = BULLETIN OF FISHERIES SCIENCES, HOKKAIDO UNIVERSITY
Volume: 57
Issue: 1-2
Start Page: 1
End Page: 8
Abstract: Nucleotide sequences of a 1,854 base pair region of the nuclear small subunit(18S)rDNA gene and of a 475 or 476 base pair region of the mitochondrial large subunit(mt16S)rRNA gene were determined for Euphausia pacifica collected from the western/eastern subarctic Pacific,Okhotsk Sea and Japan Sea, and Thysanoessa inermis from the Okhotsk Sea T.inermis from the Okhotsk Sea and Bering Sea. Interspecific differences were 0.16-0.86% for 18S rDNA gene and 2.3-9.3%for 16S rRNA gene. Intraspefic differences are of special interest of E.pacifica from geographically distant sites,but were very small(0.0-<0.1%for 18S rDNA, and 0.0-0.4%for 16S rRNA). The lack of the regional haplotype structure in E.pacifica suggests significant gene flow mediated by the ocean-scale circulation system for those living in the west-east subarctic Pacific and Bering Sea. For the Japan Sea population which has been isolated from populations in the Subarctic Current originating 8,000 years ago,the time scale is considered to be not long enough to observe variations. On the basis of phylogenetic trees established,the position of the three euphausiids was briefly discussed.
Type: bulletin
URI: http://hdl.handle.net/2115/32480
Appears in Collections:第57巻 第1/2号

 

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