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首页> 外文期刊>Environmental toxicology and chemistry >Effects of Sublethal Chlorpyrifos Exposure on Postlarval American Lobster (Homarus americanus)
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Effects of Sublethal Chlorpyrifos Exposure on Postlarval American Lobster (Homarus americanus)

机译：亚致死毒死Expo暴露对虾后美洲龙虾的影响

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摘要

The organophosphate pesticide chlorpyrifos has been introduced to the marine environment via adsorption to agricultural soil runoff or as spray drift. Chlorpyrifos affects the survival of some larval decapod crustaceans, but no data exist on the impacts to the American lobster, Homarus americanus. The purpose of the present study was to assess the levels at which chlorpyrifos affects the survival of postlarval H. americanus. Using acute saltwater exposures, the 24- and 48-h median lethal concentrations were established for stage IV H. americanus (1.56 and 1.33 mu g/L, respectively). Movement, acetylcholinesterase activity, intermoult period, specific growth rate, and moult increment were measured during exposure to sublethal concentrations. Movement patterns were assessed to establish a 48-h median inhibition concentration for cessation of normal movement (0.66 mu g/L). Acetylcholinesterase activity was found to be inhibited immediately post-exposure to 0.50, 0.57, and 0.82 mu g/L chlorpyrifos but could be recovered within a period (9-15 d) in clean seawater. Sublethal growth effects of increased intermoult period, decreased specific growth rate, and decreased moult increment were observed during exposure to an environmentally relevant concentration (0.82 mu g/L). The present study suggests that H. americanus stage IV larvae were marginally less sensitive to chlorpyrifos compared with other decapods and that acute lethality of H. americanus postlarvae is not likely to occur with chlorpyrifos concentrations previously reported from aquatic environments. Environ Toxicol Chem 2019;38:1294-1301. (c) 2019 SETAC
机译：有机磷农药毒死rif已通过吸附到农业土壤径流中或作为喷雾漂移而引入海洋环境。毒死rif影响某些幼体十足纲甲壳类动物的存活，但尚无影响美洲龙虾美洲大螯虾的数据。本研究的目的是评估毒死rif影响幼虫H. Americanus存活的水平。使用急性盐水暴露，确定了美洲IV。H阶段的24小时和48小时中位致死浓度（分别为1.56和1.33μg/ L）。在暴露于亚致死浓度时测量运动，乙酰胆碱酯酶活性，换毛期，比生长率和换毛增量。评估运动模式以建立48小时中位抑制浓度，以停止正常运动（0.66μg / L）。发现乙酰胆碱酯酶活性在接触后立即被抑制到0.50、0.57和0.82μg / L毒死rif，但可以在干净的海水中（9-15 d）内恢复。在暴露于环境相关浓度（0.82μg / L）的过程中，观察到了致死期延长，亚单位生长速率降低和蜕皮增加降低的亚致死生长效应。本研究表明，与其他十足动物相比，美洲Ⅳ类幼虫对毒死rif的敏感性略低，而且以前从水生环境中报告的毒死concentrations浓度不可能使美洲印第安人后幼虫的急性致死性。 Environ Toxicol Chem 2019; 38：1294-1301。 （c）2019年SETAC

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  • 来源
    《Environmental toxicology and chemistry》 |2019年第6期|1294-1301|共8页
  • 作者

    Taylor Laura J.; Mann Nicole S.; Daoud Dounia; Clark K. Fraser; van den Heuvel Michael R.; Greenwood Spencer J.;

  • 作者单位

    Univ Prince Edward Isl, Atlantic Vet Coll, Dept Biomed Sci, Charlottetown, PE, Canada|Univ Prince Edward Isl, Atlantic Vet Coll, AVC Lobster Sci Ctr, Charlottetown, PE, Canada;

    Univ Prince Edward Isl, Atlantic Vet Coll, Dept Biomed Sci, Charlottetown, PE, Canada|Univ Prince Edward Isl, Atlantic Vet Coll, AVC Lobster Sci Ctr, Charlottetown, PE, Canada;

    Univ Prince Edward Isl, Atlantic Vet Coll, Dept Biomed Sci, Charlottetown, PE, Canada|Homarus, Shediac, NB, Canada|EcoNov, Moncton, NB, Canada;

    Dalhousie Univ, Fac Agr, Dept Anim Sci & Aquaculture, Bible Hill, NS, Canada;

    Univ Prince Edward Isl, Atlantic Vet Coll, Dept Biomed Sci, Charlottetown, PE, Canada|Univ Prince Edward Isl, Canadian Rivers Inst, Charlottetown, PE, Canada|Univ Prince Edward Isl, Dept Biol, Charlottetown, PE, Canada;

    Univ Prince Edward Isl, Atlantic Vet Coll, Dept Biomed Sci, Charlottetown, PE, Canada|Univ Prince Edward Isl, Atlantic Vet Coll, AVC Lobster Sci Ctr, Charlottetown, PE, Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Chlorpyrifos; Organophosphate; Pesticide; Homarus americanus; Lobster;

    机译：毒死rif;高磷酸盐;农药;美洲霍马斯;龙虾;

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