Biodiversity of Demersal Fish Communities in the Cosmonaut Sea Revealed by DNA Barcoding Analyses

被引:0
|
作者
Li, Hai [1 ]
Miao, Xing [1 ]
Wang, Rui [1 ]
Liao, Yuzhuo [1 ,2 ]
Wen, Yilin [1 ,3 ]
Zhang, Ran [1 ]
Lin, Longshan [1 ,3 ]
机构
[1] Minist Nat Resources, Inst Oceanog 3, Lab Marine Biodivers Res, Xiamen 361005, Peoples R China
[2] Xiamen Univ, Coll Ocean & Earth Sci, Xiamen 361102, Peoples R China
[3] Shanghai Ocean Univ, Coll Marine Sci, Shanghai 201306, Peoples R China
关键词
Antarctic fishes; COI; cryptic species; Southern Ocean; species identification; MOLECULAR TAXONOMY; PRYDZ BAY; ROSS SEA; DIVERSITY; IDENTIFICATION; IMPROVEMENTS;
D O I
10.3390/genes15060691
中图分类号
Q3 [遗传学];
学科分类号
071007 ; 090102 ;
摘要
The Cosmonaut Sea is one of the least accessed regions in the Southern Ocean, and our knowledge about the fish biodiversity in the region is sparse. In this study, we provided a description of demersal fish diversity in the Cosmonaut Sea by analysing cytochrome oxidase I (COI) barcodes of 98 fish samples that were hauled by trawling during the 37th and 38th Chinese National Antarctic Research Expedition (CHINARE) cruises. Twenty-four species representing 19 genera and 11 families, namely, Artedidraconidae, Bathydraconidae, Bathylagidae, Channichthyidae, Liparidae, Macrouridae, Muraenolepididae, Myctophidae, Nototheniidae, Paralepididae and Zoarcidae, were discriminated and identified, which were largely identical to local fish occurrence records and the general pattern of demersal fish communities at high Antarctic shelf areas. The validity of a barcoding gap failed to be detected and confirmed across all species due to the indicative signals of two potential cryptic species. Nevertheless, DNA barcoding still demonstrated to be a very efficient and sound method for the discrimination and classification of Antarctic fishes. In the future, various sampling strategies that cover all geographic sections and depth strata of the Cosmonaut Sea are encouraged to enhance our understanding of local fish communities, within which DNA barcoding can play an important role in either molecular taxonomy or the establishment of a dedicated local reference database for eDNA metabarcoding analyses.
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页数:17
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