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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/43472

Title: DNA barcoding reveals cryptic diversity in the peanut worm Sipunculus nudus
Authors: Te-Hua Hsu;Yue Ning;Jin-Chywan Gwo;Zhi-Nan Zeng
Contributors: 國立臺灣海洋大學:水產養殖學系
Date: 2013-04
Issue Date: 2017-08-17T03:14:03Z
Publisher: Molecular Ecology Resourses
Abstract: Abstract:Peanut worm (Sipunculus nudus) is a cosmopolitan species mainly distributed in tropical and subtropical coastal waters. Analysis of the mitochondrial cytochrome c oxidase subunit I (COI) gene sequences among S. nudus from GenBank revealed high genetic variation (p-distance, 0.115-0.235; k2p, 0.128-0.297) and paraphyletic relationships. These indicated misidentification and/or cryptic diversity may be present in the genus Sipunculus. To understand the genetic diversity and to manage the recourse of S. nudus, we collected specimens from coastal waters of southern China and Taiwan. In the phylogenetic topology, specimens can be separated into four distinct clades; three of these clades (clade A, B and C) were only represented from this region (southern China and Taiwan), but the clade D grouped with individuals from Central America (Atlantic coast). Furthermore, individuals of clades A and D were collected at the same location, which does not support the hypothesis that this genetic break reflects contemporary geographical isolation. The four distinct clades observed among coastal waters of southern China and Taiwan indicated underestimated diversity. It is noteworthy that the cryptic diversity is vulnerable under high pressure of human activity.
Relation: 13(4), pp.596-606
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/43472
Appears in Collections:[水產養殖學系] 期刊論文

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