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| 1 | 典型贝类对一株拟菱形藻所产多莫酸毒素的蓄积差异性研究显示文摘以分离自中国台湾海峡的一株产神经毒素多莫酸(domoic acid,DA)的多列拟菱形藻(Pseudo-nitzschia,MC4181)为研究对象,比较研究了中国3种典型经济贝类——栉孔扇贝(Chlamys farreri)、紫贻贝(Mytilus edulis)和太平洋牡蛎(Crassostrea gigas)对其所产DA的蓄积能力。结果表明,连续暴露4 d后,3种贝类中DA的蓄积含量、组织分布差异显著。其中,太平洋牡蛎对DA的整体蓄积能力(以软体组织计)显著高于栉孔扇贝和紫贻贝(P<0.01),其最高含量为42.40μg/kg。紫贻贝的软体部质量与DA蓄积含量成显著负相关(P<0.01),说明小个体贻贝蓄积DA能力要强于大个体,其他两种贝类中并未发现类似结果。虽然3种贝类的内脏团、外套膜、鳃丝、性腺及闭壳肌均具有一定的DA蓄积能力,但内脏团的蓄积能力最高,栉孔扇贝、紫贻贝和太平洋牡蛎内脏团中的DA含量分别为11.12、1.63和26.96μg/kg。本研究揭示了不同贝类对DA蓄积含量的差异性,初步探讨了贻贝蓄积DA含量与其自身大小的相关性,可为进一步开展贝类食用安全风险评估、促进沿海贝类产业的可持续发展和保护消费者健康提供参考依据。 | 郑关超 吴海燕 彭吉星 郭萌萌 李兆新 李扬 谭志军 | 2020 | 中国渔业质量与标准2020，10，1： | 1 |
| 2 | First observation of domoic acid and its isomers in shellfish samples from Shandong Province,China显示文摘A total of 133 shellfish samples were collected in seven cities of Shandong Province,China,from May to October,2019.The domoic acid(DA)concentrations were determined by liquid chromatographytandem mass spectrometry(LC-MS/MS),and their distribution characteristics were investigated.DA concentration was detected high in over 1/3(36.1%)of the samples of four kinds of shellfish in all three seasons in range from 0 to 102μg/kg.The highest DA concentrations were 102,101,36.7,and 10.2μg/kg in Crassostrea gigas,Chlamys farreri,Mactra veneriformis,and Mytilus edulis,respectively.Geographically,Yantai(22.0μg/kg)and Weihai(16.9μg/kg)showed relatively high concentrations of DA,whereas Rizhao and Dongying presented only 0.85-and 1.76-μg/kg DA,respectively.DA concentrations in the shellfish samples were strongly related to seasonal changes,being significantly higher in autumn and summer than that in spring.The DA risk exposure assessments indicate that dietary seafood consumption did not pose a health threat to general human population.In addition,three isomers(isoA,isoD,isoE)and 5′-epimer DA were detected in 3.00%-15.80%of the shellfish samples.This study is the first to observe DA and its isomers in shellfish samples of Shandong Province.The results demonstrate that DA contamination is very common and should be continuously monitored. | Guanchao ZHENG Haiyan WU Mengmeng GUO Jixing PENG Yuxiu ZHAI Zhijun TAN | 2022 | Journal of Oceanology and Limnology2022，40，6： | 0 |
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