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首页> 外文期刊>Environmental toxicology and chemistry >VERY HIGHLY TOXIC EFFECTS OF ENDOSULFAN ACROSS NINE SPECIES OF TADPOLES: LAG EFFECTS AND FAMILY-LEVEL SENSITIVITY
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VERY HIGHLY TOXIC EFFECTS OF ENDOSULFAN ACROSS NINE SPECIES OF TADPOLES: LAG EFFECTS AND FAMILY-LEVEL SENSITIVITY

机译：九个水仙科的纳豆对极强的毒性作用：滞后效应和家庭敏感性

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摘要

Pesticides are commonly used for health and economic benefits worldwide, but increased use has led to increased contamination of aquatic habitats. To understand potential impacts on nontarget organisms in these habitats, toxicologists generally use short-term (4-d) toxicity tests on model organisms. For most pesticides, few amphibian tests have been conducted, but there is growing concern about the potential impact of pesticides to amphibian populations. For the insecticide cndosulfan, previous studies have found that low concentrations can be very highly toxic to amphibians and have suggested that this mortality may exhibit important lag effects. To estimate the lethal concentration of endosulfan that would cause 50% mortality after 4 d (LC50_(4-d)) across a diversity of amphibians and the presence of lag effects, LC50_(4-d) experiments were conducted on nine species of tadpoles from three families (Bufonidae: Bufo americanus, B. boreas; Hylidae: Pseudacris crucifer, P. regilla, Hyla versicolor, and Ranidae: Rana pipiens, R. clamitans, R. cascadae, R. catesbeianu) and then held the animals for an additional 4 d in clean water. The LC50_(4-d) values for endosulfan ranged from 1.3 to 120 ppb, which classifies endosulfan as highly toxic to very highly toxic. Moreover, holding the animals for an additional 4 d in clean water revealed significant additional mortality in three of the nine species. Leopard frogs, for example, experienced no significant death during the initial 4-d exposure to 60 ppb but 97% death after an additional 4 d in clean water. A phylogenetic pattern also appears to exist among families, with Bufonidae being least susceptible, Hylidae being moderately susceptible, and Ranidae being most susceptible. Results from the present study provide valuable data to assess the impact of endosulfan on a globally declining group of vertebrates.
机译：农药在世界范围内普遍用于健康和经济利益，但使用量的增加导致水生生境的污染增加。为了了解对这些栖息地中非目标生物的潜在影响，毒理学家通常对模型生物使用短期（4-d）毒性测试。对于大多数农药，很少进行两栖动物测试，但是人们越来越担心农药对两栖动物种群的潜在影响。对于杀虫剂硫丹，先前的研究发现低浓度的两栖动物可能具有极高的毒性，并表明该死亡率可能表现出重要的滞后效应。为了估算硫丹的致死浓度，该浓度会在4天后导致50％的死亡率（LC50_（4-d））跨两栖动物，并且存在滞后效应，对9种of进行了LC50_（4-d）实验来自三个科（Bufonidae：美洲大蟾蜍，B.boreas； Hylidae：十字花科植物，Reg.P。regilla，Hyla versicolor和Ranidae：Rana pipiens，R.clamitans，R.cascadae，R.catesbeianu），然后将动物饲养在清水中再放置4天。硫丹的LC50_（4-d）值在1.3 ppb至120 ppb的范围内，将硫丹分为高毒性至极高毒性。此外，将动物在清洁水中再饲养4天后，发现这9个物种中有3个的死亡率显着增加。例如，豹蛙在最初的4 d暴露于60 ppb的过程中没有出现明显的死亡，但是在干净的水中经过4 d的死亡却有97％的死亡。在家族中似乎也存在系统发育模式，Bufonidae最不易感，Hylidae中等易感，Ranidae最易感。本研究的结果为评估硫丹对全球数量下降的脊椎动物群的影响提供了有价值的数据。

著录项

  • 来源
    《Environmental toxicology and chemistry》 |2009年第9期|1939-1945|共7页
  • 作者

    Devin K. Jones; John I. Hammond; Rick A. Relyea;

  • 作者单位

    Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA;

    Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA;

    Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA;

  • 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

    ecotoxicology; amphibian decline; nontarget; anuran; contaminant;

    机译：生态毒理学两栖动物下降非目标蜮;污染物;

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