Scyphozoan jellyfish outbreak events are drawing increasing attentions during the past decade.Elemental compositions of statoliths are helpful to understand jellyfish life history and blooming mechanisms,but very rare endeavor has been focused on the Scyphozoan class.In this work,we explored the feasibility of element analysis of Aurelia aurita(a representative Scyphozoan jellyfish outbreak species in China)which may be used as proxies of environment parameters during jellyfish living and moving.Statolith crystals of Aurelia aurita were found to be a gathering of hexahedron type trigonal needle with size of 10-50 μm long,and 5-10 μm in diameter.By using laser ablation inductively coupled plasma mass spectrometry(LA-ICP-MS)downhole profiling method,elements such as Ca,Sr,Mg,Na and P were found to be above the limit of detection and limit of quantification.The epidermis of statocyst could significantly impact the element analyses,so the real statolith element signal section needs to be selected based on elements and Ca profiles together with care.By laser ablated a signal spot repeatedly,the analytical uncertainty was about 3％-4％for Sr/Ca content ratio and Mg/Ca content ratio,but above 10％for other element/Ca content ratios(n=3).Based on the analysis of statolith from temperature-control cultured jellyfish,Sr/Ca content ratios among different statoliths of the same jellyfish were about 6％(n=14),demonstrating biological processes/vital effects causing small variations compared with analytical uncertainties.Therefore,Sr/Ca content ratios may be used as a potential proxy to reveal the living environment variations the Scyphozoan jellyfish has experienced,such as temperature history,which is helpful to understand jellyfish bloom mechanisms.

Tiezhu Mi;Shibin Zhao;Minzhi Qiu;Bochao Xu;Qingzhen Yao;Yu Zhen;Zhiqing Lai;Fang Zhang;Zhigang Yu

Key Laboratory of Marine Environment and Ecology of Ministry of Education,Ocean University of China,Qingdao 266100,China;Marine Ecology and Environmental Science Laboratory,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao 266237,China;Frontiers Science Center for Deep Ocean Multispheres and Earth System/Key Laboratory of Marine Chemistry Theory and Technology of Ministry of Education,Ocean University of China,Qingdao 266100,China;College of Chemistry and Chemical Engineering,Ocean University of China,Qingdao 266100,China;Key Laboratory of Submarine Geosciences and Prospecting Techniques of Ministry of Education,Ocean University of China,Qingdao 266100,China;College of Marine Geosciences,Ocean University of China,Qingdao 266100,China;Key Laboratory of Marine Ecology and Environmental Sciences,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China

海洋学报（英文版）

[1]Tiezhu Mi;Shibin Zhao;Minzhi Qiu;Bochao Xu;Qingzhen Yao;Yu Zhen;Zhiqing Lai;Fang Zhang;Zhigang Yu-.Using LA-ICP-MS to analysis elemental composition of statoliths of Scyphozoan jellyfish)[J].海洋学报（英文版）,2022(11):81-87

statoliths,Scyphozoan,aurita,Statolith,hexahedron,statocyst,statolith

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