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首页> 外文期刊>Environmental toxicology and chemistry >ESFENVALERATE-INDUCED CASE-ABANDONMENT IN THE LARVAE OF THE CADDISFLY (BRACHYCENTRUS AMERICANUS)
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ESFENVALERATE-INDUCED CASE-ABANDONMENT IN THE LARVAE OF THE CADDISFLY (BRACHYCENTRUS AMERICANUS)

机译：戊烯戊菊酯引起的幼虫在CADDISFLY（美洲臂尾BRA）幼虫中的释放

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摘要

Field-collected Brachycentrus americanus Banks (Trichoptera: Brachycentridae) larvae were used to investigate the relationship between esfenvalerate exposure and case-abandonment response, determine larval ability to construct a new case, and measure the change in predation risk to insects in rebuilt cases. We evaluated case-abandonment following four environmentally relevant esfenvalerate exposures, 0.05, 0.1, 0.2, and 0.4 μg/L; 48-h exposures to 0.2 and 0.4 μg/L (nominal) esfenvalerate both resulted in over 60% of larvae abandoning cases and were statistically indistinguishable. Propensity to engage in building behaviors was significantly diminished in 0.2 and 0.4 μg/L esfenvalerate-exposed insects that had abandoned cases, with less than 20% of exposed insects producing cases. Cases built by intoxicated larvae were characterized by a disorganized composition, and required half the pressure to crush versus cases built by nonexposed larvae. Pre-exposing case-building material to 1 μg/L esfenvalerate also reduced the physical strength of rebuilt cases. Larvae inhabiting weaker rebuilt cases and larvae without cases were significantly more susceptible to predation by second year Hesperoperla pacifica Banks (Plecoptera: Perlidae) stonefly nymphs than those in original cases. Overall, we concluded that small behavioral responses can have profound consequences for survival of species and reveal susceptible stages in life-cycles that can be overlooked by conventional approaches to ecological risk assessment.
机译：野外收集的美洲短吻鲈（Trichoptera：Brachycentridae）幼虫被用来调查esfenvalerate暴露与病例放弃反应之间的关系，确定构造新病例的幼虫能力，并测量重建病例中昆虫对捕食风险的变化。我们评估了四种与环境有关的艾芬戊酸酯暴露量（0.05、0.1、0.2和0.4μg/ L）后的病例放弃率； 48小时暴露于0.2和0.4μg/ L（名义上）的乙草戊酸酯都导致超过60％的幼虫遗弃病例，并且在统计学上难以区分。暴露于废弃案例中的暴露于0.2和0.4μg/ L的艾芬戊酸酯的昆虫参与建筑行为的可能性大大降低，其中不到20％的暴露昆虫生产案例。由醉酒的幼虫构成的病例的特征是组织混乱，与未暴露的幼虫构成的病例相比，压碎所需的压力只有一半。将制例材料预先暴露于1μg/ L的艾斯戊戊酸酯也降低了重建案例的物理强度。与原始病例相比，居住在较弱的重建病例中的幼虫和没有病例的幼虫更容易受到第二年的Hesperoperla pacifica Banks（Plecoptera：Perlidae）石蝇若虫的捕食。总的来说，我们得出的结论是，小的行为反应可能会对物种的生存产生深远的影响，并揭示生命周期中的易感阶段，而传统的生态风险评估方法可以忽略这些阶段。

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  • 来源
    《Environmental toxicology and chemistry》 |2008年第2期|397-403|共7页
  • 作者

    Katherine R. Johnson; Paul C. Jepson; Jeffrey J. Jenkins;

  • 作者单位

    Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, Oregon 97331, USA;

    Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, Oregon 97331, USA Integrated Plant Protection Center, Oregon State University, Corvallis, Oregon 97331, USA;

    Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, Oregon 97331, 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

    sublethal effects; synthetic pyrethroid; trichoptera; case-abandonment recovery;

    机译：亚致死作用合成拟除虫菊酯鳞翅目遗弃恢复;

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