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首页> 外文期刊>Environmental toxicology and chemistry >EARLY SIGNS OF LETHAL EFFECTS IN DAPHNIA MAGNA (BRANCHIOPODA, CLADOCERA) EXPOSED TO THE INSECTICIDE CYPERMETHRIN AND THE FUNGICIDE AZOXYSTROBIN
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EARLY SIGNS OF LETHAL EFFECTS IN DAPHNIA MAGNA (BRANCHIOPODA, CLADOCERA) EXPOSED TO THE INSECTICIDE CYPERMETHRIN AND THE FUNGICIDE AZOXYSTROBIN

机译：暴露于杀虫剂氯氰菊酯和杀真菌剂偶氮雌激素中的大环蚤（Branchiopoda，Cladocera）的杀虫作用的早期迹象

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摘要

This study presents the effects of sublethal concentrations of pesticides cypermethrin and azoxystrobin on the activity of several physiological parameters of egg-carrying Daphnia magna studied using a video-image technique. Single tethered daphnids were continuously recorded for 24 h of pesticide exposure, and the activity of the heart, the filtering limbs, the mandibles, and the focal spine were subsequently analyzed. Acute toxicity tests based on the criteria of immobilization were performed on egg-carrying D. magna, and sublethal concentrations of 0.1, 1.0, and 10μg/L cypermethrin and 0.5, 1.0, and 2.0mg/L azoxystrobin were established. At a concentration as low as 0.1 μg/L cypermethrin, the 5% effective concentration after 24 h of exposure (EC5,24h), the activity of the focal spine increased and the filtering limb activity decreased. The activity of the mandibles was reduced by exposure to 1.0 (EC 18,24 h) and 10μg/L (EC41,24h) cypermethrin, whereas heart activity increased at a concentration of 10 μg/L (EC41,24h). With regard to azoxystrobin, the activity of all response parameters except the focal spine decreased by exposure to 0.5mg/L (EC4,24h) azoxystrobin. The focal spine was not affected by azoxystrobin. The results show that physiological mechanisms important for ingestion of food in D. magna may be impaired by low concentrations of commonly used pesticides.
机译：这项研究提出了使用视频图像技术研究的亚致死浓度的杀虫剂氯氰菊酯和嘧菌酯对载卵大蚤的几个生理参数活性的影响。连续记录单束水蚤的杀虫剂暴露情况24小时，随后分析心脏，滤肢，下颌骨和局灶性脊柱的活动。对载有卵的D. magna进行了基于固定标准的急性毒性试验，建立了亚致死浓度分别为0.1、1.0和10μg/ L的氯氰菊酯，0.5、1.0和2.0mg / L的嘧菌酯。氯氰菊酯的浓度低至0.1μg/ L，即暴露24 h（EC5,24h）后的有效浓度为5％，局部脊柱活动增加而滤肢活动减少。下颌骨的活性通过暴露于1.0（EC 18,24 h）和10μg/ L（EC41,24h）氯氰菊酯而降低，而心脏活性在10μg/ L（EC41,24h）的浓度下增加。关于嘧菌酯，暴露于0.5mg / L（EC4,24h）的嘧菌酯，除局灶性脊柱外所有响应参数的活性均降低。局灶性脊柱不受嘧菌酯的影响。结果表明，低浓度的常用农药可能会损害对D. magna的食物摄取重要的生理机制。

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  • 来源
    《Environmental toxicology and chemistry》 |2010年第10期|p.2371-2378|共8页
  • 作者

    Ursula Friberg-Jensen; Goesta Nachman; Kirsten S. Christoffersen;

  • 作者单位

    Freshwater Biological Laboratory, Department of Biology, University of Copenhagen, Helsingorsgade 51, DK-3400 Hillerod, Denmark;

    Ecology and Evolution, Department of Biology, University of Copenhagen, Universitetsparken 15, DK-2100 Copenhagen O, Denmark;

    rnFreshwater Biological Laboratory, Department of Biology, University of Copenhagen, Helsingorsgade 51, DK-3400 Hillerod, Denmark;

  • 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

    daphnia; pesticides; video imaging; filtering limb activity; heart rate;

    机译：水蚤农药视频成像;过滤肢体活动;心率;

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