Morphological characters and DNA barcoding of Syngnathus schlegeli in the coastal waters of China
文献类型： 外文期刊
作者： Chen Zhi 1 ; Zhang Yan 2 ; Han Zhiqiang 3 ; Song Na 1 ; Gao Tianxiang 3 ;
作者机构： 1.Ocean Univ China, Inst Evolut & Marine Biodivers, Qingdao 266003, Peoples R China
2.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R China
3.Zhejiang Ocean Univ, Fisheries Coll, Zhoushan 316022, Peoples R China
关键词： re-identification; cytochrome oxidase subunit I (COI); phylogenetics; pipefish; Chinese taxonomy of fishes
期刊名称：JOURNAL OF OCEANOLOGY AND LIMNOLOGY （ 影响因子：1.265； 五年影响因子：1.276 ）
ISSN： 2096-5508
年卷期： 2018 年 36 卷 2 期
页码：
收录情况： SCI
摘要： A Syngnathus species widely distributed in Chinese seas was permanently identified as Syngnathus acus by native ichthyologists, but the taxonomic description about this species was inadequate and lacking conclusively molecular evidence. To identify this species, 357 individuals of this species from the coastal waters of Dandong, Yantai, Qingdao and Zhoushan were collected and measured. Morphological results showed that these slender specimens were mainly brownish, usually mottled with pale. Standard length ranged from 117 mm to 213 mm with an average length of 180.3 mm. The above characters were consistent with S. schlegeli distributed in Japan but colored differently from and much smaller than typical S. acus reported in Europe. Thus, morphological studies revealed that this species was previously misidentified as S. acus and might be S. schlegeli in reality. In addition, a fragment of cytochrome oxidase subunit I (COI) gene of mitochondrial DNA was also sequenced for species identification, and 15 COI sequences belonging to different Syngnathus species were also used for the molecular identification. COI sequences of our specimens had the minimum genetic distance from recognized S. schlegeli from Japan and clustered with it firstly. The phylogenetic analysis similarly suggested that the species previously identified as S. acus in the coastal waters of China was S. schlegeli actually.
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