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首页> 外文期刊>Environmental toxicology and chemistry >LONG-TERM SEDIMENT BIOASSAY OF LEAD TOXICITY IN TWO GENERATIONS OF THE MARINE AMPHIPOD ELASMOPUS LAEVIS, S.I. SMITH, 1873
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LONG-TERM SEDIMENT BIOASSAY OF LEAD TOXICITY IN TWO GENERATIONS OF THE MARINE AMPHIPOD ELASMOPUS LAEVIS, S.I. SMITH, 1873

机译：陆生两栖鱼类两栖类伊拉斯莫斯虫的长期毒性生物测定，S.I。SMITH，1873年

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摘要

Sediments are evaluated for toxicity by measuring mortality in a single cohort of amphipods in either acute (10-d) or chronic (28-d) bioassays. This investigation differed from conventional bioassays in four ways: Sublethal effects (fecundity) were estimated; the testing period was 60+ d; two successive generations were examined; and Elasmopus laevis Smith, 1873, amphipods were employed. Four test sediments were created between 58 and 424 μg/g of lead using the 30-μg/g whole-sediment as the control. Bioaccumulated lead at 60 d varied as a linear function of lead concentration in the sediments. Fecundity, as estimated by offspring-per-chamber and/or percent reproductive success, was reduced as sediment lead concentrations increased and reproduction was delayed compared with the control. The reduction in offspring production per test chamber varied significantly as an inverse function of lead sediment concentration, best described by a curvilinear exponential equation. It was concluded that E. laevis exposed to 118 μg/g and higher could not maintain a population as large as that in the control. Although the current sediment quality guideline for lead stipulates that adverse biological effects likely will occur above 218 μg/g, this study revealed a statistically significant negative reproductive response at 118 μg/g lead, and suggests that the current regulatory guideline for lead, based on lethality, should be reconsidered.
机译：通过在急性（10天）或慢性（28天）生物测定法中测量单群双足动物的死亡率来评估沉积物的毒性。该研究与常规生物测定法在以下四个方面有所不同：估计了亚致死作用（生殖力）；试验期为60 + d；检查了两个连续的世代；和Elasmopus laevis Smith，1873年，使用了两栖动物。使用30μg/ g的沉积物作为对照，在58至424μg/ g的铅之间产生了四个测试沉积物。 60 d时生物积累的铅随沉积物中铅浓度的线性变化。与对照组相比，随着沉积物铅浓度的增加和繁殖的延迟，繁殖力（通过后代每腔和/或繁殖成功率估计）降低。每个测试室的后代产量的减少作为铅沉积物浓度的反函数而变化很大，最好用曲线指数方程来描述。结论是，暴露于118μg/ g和更高浓度的大肠埃希菌不能维持与对照组一样大的种群。尽管当前的铅沉积物质量指南规定，高于218μg/ g可能会产生不利的生物学影响，但这项研究显示，铅含量为118μg/ g时，在统计学上具有显着的负生殖反应，并建议基于杀伤力，应重新考虑。

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  • 来源
    《Environmental toxicology and chemistry》 |2007年第8期|1700-1710|共11页
  • 作者

    Mark J. Ringenary; Alan H. Molof; John T. Tanacredi; Martin P. Schreibman; Konstantinos Kostarelos;

  • 作者单位

    Polytechnic University, Department of Civil Engineering, 6 Metro Tech Center, Brooklyn, New York 11201, USA;

    Polytechnic University, Department of Civil Engineering, 6 Metro Tech Center, Brooklyn, New York 11201, USA;

    Dowling College, Department of Earth and Marine Science, Kramer Science Center, Oakdalc-Long Island, New York 11769-1999, USA;

    Aquatic Research and Environmental Assessment Center, Brooklyn College, City University of New York, 2900 Bedford Avenue, Brooklyn, New York 11210, USA;

    University of Cyprus, Department of Civil and Environmental Engineering, 75 Kallipoleos Street, PO Box 20537, 1678 Nicosia, Cyprus;

  • 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
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  • 关键词

    sediment toxicity; amphipod bioassay; lead; population bioassay; sediment quality criteria;

    机译：沉积物毒性两栖类生物测定;铅;人口生物测定沉积物质量标准;

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