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Inductive eff ect of bioactive substances on strobilation of jellyfi sh aurelia coerulea

Journal of Oceanology and Limnology 2020年第5期38卷 1548-1558页

作者： WANG Nan WANG Minxiao WANG Yantao LI Chaolun Key Laboratory of Marine Ecology and Environmental Sciences Center of Deep-sea ResearchInstitute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Ecology and Environmental Science Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China University of Chinese Academy of Sciences Beijing 100049China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China

The moon jellyfi sh aurelia *** a worldwide distributed scyphozoan species that seasonally blooms in coastal *** the strobilation is directly responsible for the scale of jellyfi sh bloom,the underlying mechanisms remain largely *** exposed aurelia coerulea polyps to 18 bioactive substances to test their ability to induce strobilation at the natural typically non-strobilation temperature of 21°*** revealed that *** polyps responded in four *** I—no change for estradiol,folic acid,iodine,retinoic acid,serotonin hydrochloride,and vitamin *** suggested that 5-aza-2-deoxycytidine and N-acetyl-L-glutamic acid could not induce strobilation,since the percent of strobilated polyps in these two substances treatments was 3.3%and 1%,*** II—polyp body elongation for 3,5-diiodo-Ltyrosine,indole-3-acetic acid,L-dopamine,and noradrenaline *** III—transverse constrictions for L-thyroxine,progesterone,and melatonin ***,Type IV—complete strobilation for 5-methoxy-2-methylindole,acetylcholine chloride,and indomethacin treatments,where the pre-strobilation periods were 2,4,and 2 days,and the mean numbers of ephyrae released per strobila were 4.7,5.7,and 5.7,*** results reveal that indole derivatives,which contained methoxy or methyl pharmacophore,were the common strobilation inducer in the genus *** organic compounds,catecholamine,acetylcholine chloride,and retinoic acid are species-specifi c strobilation ***,*** strobilation is regulated by neuronal and endocrine *** fi ndings provide clues in understanding the mechanism of strobilation and contribute to developing specifi c strobilation antagonists in controlling moon jellyfi sh blooms.

关键词： aurelia coerulea jellyfi sh strobilation bioactive substances metamorphosis

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Application of DNA metabarcoding to characterize the diet of the moon jellyfish aurelia coerulea polyps and ephyrae

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Acta Oceanologica Sinica 2021年第8期40卷 160-167页

作者： Tingting Sun Lei Wang Jianmin Zhao Zhijun Dong Muping Coastal Environment Research Station Yantai Institute of Coastal Zone ResearchChinese Academy of SciencesYantai 264003China University of Chinese Academy of Sciences Beijing 100049China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China

Dietary studies of polyps and ephyrae are important to understand the formation and magnitude of jellyfish blooms and provide important insights into the marine food ***,the diet of polyps and ephyrae in situ is largely ***,prey species of the polyps and ephyrae of the moon jellyfish aurelia coerulea in situ were identified using high-throughput DNA sequencing *** results show that *** polyps and ephyrae consume a variety of prey *** polyps consume both planktonic and benthic prey,including hydromedusae,copepods,ciliates,polychaetes,stauromedusae,and *** ephyrae mainly feed on copepods and *** zooplankton,including Rathkea octopunctata and Sarsia tubulosa,were frequently found as part of the diet of *** polyps and *** utilization of highthroughput sequencing technique is a useful tool for studying the diet of polyps and ephyrae in the field,complementing the traditional techniques towards a better understanding of the complex role of gelatinous animals in marine ecosystems.

关键词： aurelia coerulea in situ dietary analysis feeding high-throughput sequencing

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Species-specific detection and quantification of scyphomedusae in Jiaozhou Bay,China,using a quantitative real-time PCR assay

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Journal of Oceanology and Limnology 2021年第4期39卷 1360-1372页

作者： Jianyan WANG Tiezhu MI Zhigang YU Guoshan WANG Qinsheng WEI Jing YANG Yu ZHEN Department of Science Research Beijing Museum of Natural HistoryBeijing 100050China Laboratory for Marine Ecology and Environmental Science Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Key Laboratory of Marine Environment and Ecology Ministry of EducationOcean University of ChinaQingdao 266100China College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education/Institute for Advanced Ocean StudyOcean University of ChinaQingdao 266100China National Marine Hazard Mitigation Service Ministry of Natural ResourcesBeijing 100194China First Institute of Oceanography Ministry of Natural ResourcesQingdao 266061China

Over the past decades,jellyfish occurred increasingly and abundantly in coastal areas ***,biomass of jellyfish,especially when they bloom,can be determined by visual ***,tiny individuals of jellyfish(e.g.,planulae,polyps,and ephyrae)are difficult to detect in the *** this study,species-specific quantitative real-time PCR assays(qPCR)(SYBR Green I)targeting the mitochondrial 16S rDNA(mt-16S rDNA)of jellyfish were developed and were used to estimate the distribution and seasonal fluctuations of four jellyfish species(Nemopilema nomurai,Cyanea nozakii,Rhopilema esculentum,and aurelia coerulea)in Jiaozhou Bay(JZB),China in *** mt-16S rDNA of *** and *** was detected in most of the survey months and it peaked in July(1.03×10^(4) copies/L)and September(1.08×10^(6) copies/L),*** mt-16S rDNA of *** occurred from August to October only with monthly mean values of 7.18-46.17 copies/L and was mainly located from the middle part to the outer part of the *** mt-16S rDNA of *** was the least abundant among the four species and was detected in only one sample(B2 station in March),with a value of 88.49 copies/*** Spearman correlation test revealed that phytoplankton biomass was significantly and positively correlated with the mt-16S rDNA abundance of ***(R=0.37,P<0.01)and negatively with the mt-16S rDNA of ***(R=-0.36,P<0.01).The qPCR assay will enable the identification and quantification of jellyfish species in their whole life history and can be used as an approach in combination of the traditional jellyfish survey.

关键词： jellyfish bloom aurelia coerulea Nemopilema nomurai Cyanea nozakii Rhopilema esculentum mitochondrial 16S rDNA

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Molecular identifi cation and population diff erentiation of aurelia *** in sea cucumber aquaculture ponds of northern China

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Journal of Oceanology and Limnology 2021年第3期39卷 989-996页

作者： Saijun PENG Qingqing LIU Lei WANG Tingting SUN Tamara SHIGANOVA Zhijun DONG Muping Coastal Environment Research Station Yantai Institute of Coastal Zone ResearchChinese Academy of SciencesYantai 264003China University of Chinese Academy of Sciences Beijing 100049China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China Shirshov Institute of Oceanology Russian Academy of Sciences Moscow 117997 Nakhimovskyi pr.36Russia

aurelia *** have been reported to form blooms in sea cucumber aquaculture ponds in the Bohai and Yellow *** identify the species,we carried out a genetic analysis of aurelia *** and medusae based on mitochondrial 16 S rRNA *** offour aurelia *** populations were collected in sea cucumber aquaculture ponds and samples offour aurelia *** populations were collected in coastal *** a BLASTn search,we found that both the ephyrae collected in the aquaculture ponds and medusae collected in coastal waters belong to aurelia *** haplotypes were recovered from the 16 S rRNA *** overall haplotype diversity and nucleotide diversity of the 166 *** individuals were 0.686%and 0.329%,respectively,indicating high haplotype diversity and low nucleotide ***,the haplotype diversity of ephyrae populations were generally lower than that of medusae populations with close sampling *** genetic differentiation between ephyrae populations collected in the sea cucumber aquaculture ponds and *** medusae collected in coastal waters was not significant,suggesting the ephyrae populations in the sea cucumber culture ponds were part of the same genetic group as the medusae populations in the coastal *** analysis of the 16 S rRNA region revealed that there was no significant correlation between the haplotypes and the geographic distribution of *** fixation index values showed significant genetic differentiation and limited gene flow between *** population of Weifang and other locations.

关键词： aurelia coerulea medusae ephyrae 16S r RNA gene analyzes genetic differentiation genetic variability

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Molecular monitoring plankton community during jellyfish blooms in the water near the Liaoning Hongyan River Nuclear Power Plant

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Journal of Oceanology and Limnology 2023年第5期41卷 1781-1794页

作者： Ming YUE Tiezhu MI Ying LI Xianyu GONG Yu ZHEN Key Laboratory of Marine Environment and Ecology Ocean University of ChinaMinistry of EducationQingdao 266100China Laboratory for Marine Ecology and Environmental Science Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China

The Liaoning Hongyan River Nuclear Power Plant is located on the east coast of Liaodong Bay in the Bohai Sea,China,and the safety of the cooling water is often threatened by large-scale jellyfish ***,monitoring jellyfish growth,migration,and disappearance is essential to the safety of the nuclear power *** this study,high-throughput sequencing was used to analyze the community characteristics of mesoplankton in the sea area at the inlet and outlet from April to September *** the same time,the micro-individuals of jellyfish(including oosperm,planula,polyps,or ephyra of jellyfish)in the water were detected by real-time fluorescent quantitative PCR(qPCR).Both the maximum abundance of aurelia coerulea and Nemopilema nomurai in July were detected by high-throughput sequencing and q *** three common taxa of plankton(Paracalanus,Calanoida,and Poaceae)were found in the waters near the inlet and outlet,and the beta diversity of plankton in the waters near the inlet and outlet was low in the same *** on the plankton community composition in the sea water near the inlet,it could be speculated that jellyfish outbreaks would have a significant impact on the plankton via the predation *** maximum mt-16S rDNA copy numbers of *** and *** in the samples from the waters of Liaodong Bay were detected in June 2019,and that of *** showed an increasing trend from north to south,with the jellyfish tending to move to the seawaters near the *** results indicate that the optimum monitoring period for jellyfish outbreaks in Liaodong Bay is from the end of May to the end of July.

关键词： jellyfish aurelia coerulea Nemopilema nomurai molecular monitoring community

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