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Differences in the concentrations of trace elements among different hard structures and their potential application in species identification: a case study on Loliginidae cryptic species

文献类型： 外文期刊

作者： Fang, Zhou 1 ; Jin, Yue 1 ; Chen, Xinjun 1 ; Wang, Yan 1 ;

作者机构： 1.Shanghai Ocean Univ, Coll Marine Sci, Shanghai, Peoples R China

2.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao, Peoples R China

3.Qingdao Natl Lab Marine Sci & Technol, Funct Lab Marine Fisheries Sci & Food Prod Proc, Qingdao, Peoples R China

4.Shanghai Ocean Univ, Natl Engn Res Ctr Ocean Fisheries, Shanghai, Peoples R China

5.Shanghai Ocean Univ, Key Lab Sustainable Exploitat Ocean Fisheries Res, Minist Educ, Shanghai, Peoples R China

6.Minist Agr, Key Lab Ocean Fisheries Explorat, Shanghai, Peoples R China

关键词： Uroteuthis chinensis; Uroteuthis edulis; trace element; hard structure; ontogenetic stage; species identification

期刊名称：MARINE BIOLOGY RESEARCH （ 影响因子：1.298； 五年影响因子：1.499 ）

ISSN： 1745-1000

年卷期： 2021 年 17 卷 4 期

页码：

收录情况： SCI

摘要： It is a challenge to identify Uroteuthis chinensis and Uroteuthis edulis, which widely distributed in the coast of China, due to their morphological similarity. Trace elements in cephalopod hard structures may indicate species difference. In this study, with the laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS), we analysed trace elements in three kinds of hard structures (statolith, beak and eye lens), determined the differences in the concentrations of trace elements among different hard structures and identified U. chinensis and U. edulis caught from northern South China Sea with the determined elemental signatures in different ontogenetic stages. Nine elements were detected from the squid's statolith and beak, eight elements were detected from eye lens. Calcium (Ca) was the most abundant element in both statolith and beak, whereas phosphorus (P) was the most abundant element in eye lens. The significant differences in some trace elements were determined among different ontogenetic stages in both species. Discriminant analysis results showed that the correct classification rate based on trace elements in the late life stages (sub-adult and adult) was higher than that based on trace elements in the early life stages (embryonic, paralarval and juvenile). All three hard structures yielded a similar classification rate.

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