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首页> 外文学位 >Bioaccumulation and biotransformation of chlorinated and brominated organohalogens and metabolites in a deepwater sculpin (Myoxocephalus thompsoni) food chain from Lake Huron.
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Bioaccumulation and biotransformation of chlorinated and brominated organohalogens and metabolites in a deepwater sculpin (Myoxocephalus thompsoni) food chain from Lake Huron.

机译：休伦湖深水s鱼（Myoxocephalus thompsoni）食物链中氯化和溴化有机卤素和代谢物的生物富集和生物转化。

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摘要

The benthic amphipod diporeia hoyi (D. hoyi ), deepwater sculpin (Myoxocephalus thompsoni) and burbot (Lota Iota) have a predator-prey relationship common in the western Great Lakes. The study of persistent and bioaccumulative contaminants in these aquatic species has been limited to (legacy) chlorinated substances such as PCBs, where deepwater sculpin appears to possess an unusual metabolic capacity affecting PCB toxicokinetics. The present thesis reports on the first time identity of numerous chlorinated and brominated compounds in this Lake Huron food chain, i.e., legacy and emerging chlorinated (i.e., PCBs) and brominated (e.g., the flame retardants polybrominated diphenyl ether (PBDE)) contaminants. The depletion of PCB and PBDE congeners, presence of hydroxyl (OH) and/or methylsulphonyl (MeSO2) containing analogues, bioaccumulation factors of > 1 in cases of both PCB and PBDE congeners and apparent metabolic products, and relationships to enzyme-mediated catalytic activity e.g., cytochrome P450 monooxygenase) suggested that deepwater sculpin and to a lesser extent burbot possess a metabolism capacity towards selected organohalogens. The present findings increase our understanding of the metabolism-related aspects of chlorinated and brominated toxicokinetics in the deepwater sculpin food chain from Lake Huron, and the presence of and exposure to new classes of xenobiotic compounds.
机译：底栖两栖动物双孢霍伊（D. hoyi），深水杜鹃（Myoxocephalus thompsoni）和burbot（Lota Iota）在西部大湖地区具有食肉动物与猎物的关系。对这些水生物种中持久性和生物蓄积性污染物的研究仅限于（遗留）氯化物，例如多氯联苯，其中的深水石cul似乎具有影响多氯联苯毒物代谢的异常代谢能力。本论文首次报告了休伦湖食物链中许多氯化和溴化化合物的身份，即遗留和新兴的氯化（即PCBs）和溴化（例如阻燃剂多溴联苯二苯醚（PBDE））污染物。多氯联苯和多溴二苯醚同类物的消耗，含羟基（OH）和/或甲基磺酰基（MeSO2）的类似物的存在，多氯联苯和多溴二苯醚同源物和明显的代谢产物的生物蓄积系数> 1，以及与酶介导的催化活性的关系例如，细胞色素P450单加氧酶）表明深水sculpin和较小的Burbot具有对选定的有机卤素的代谢能力。目前的发现增加了我们对休伦湖深水雕刻食物链中氯代和溴代毒代动力学的代谢相关方面的了解，以及新型异源生物化合物的存在和暴露。

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  • 作者

    Scipione, Gianfranco.;

  • 作者单位

    University of Windsor (Canada).;

  • 授予单位 University of Windsor (Canada).;
  • 学科 Environmental Sciences.;Agriculture Fisheries and Aquaculture.
  • 学位 M.Sc.
  • 年度 2006
  • 页码 118 p.
  • 总页数 118
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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