...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental toxicology and chemistry >EFFECTS OF THE SYNTHETIC PYRETHROID INSECTICIDE, ESFENVALERATE, ON LARVAL LEOPARD FROGS (RANA spp.)
【24h】

EFFECTS OF THE SYNTHETIC PYRETHROID INSECTICIDE, ESFENVALERATE, ON LARVAL LEOPARD FROGS (RANA spp.)

机译：合成拟除虫菊酯类杀虫剂乙草酸酯对幼虫的危害（蛙属）

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Leopard frog (Rana spp.) tadpoles exposed to esfenvalerate in the laboratory experienced a decrease in activity at concentrations as low as 1.3 μg/L and exhibited a convulsive, twitching response at concentrations of 3.6 μg/L. The 96-h median lethal concentration was 7.29 μg/L. Temperature influenced amphibian mortality; the mortality concentration-response slope at 22℃ was significantly greater than at 18℃. Tadpoles exposed in a pond showed the same responses (inactivity, convulsive actions, and death) at similar concentrations as laboratory test organisms. Surviving tadpoles from laboratory tests resumed normal behavior 1 week after being placed into clean water, but most of those tadpoles that exhibited convulsive behavior during initial exposure eventually died. Tadpoles surviving pond exposures showed no later mortality, but rather exhibited a negative density-growth relation. Measured pyrethroid concentrations in ponds and streams adjacent to sprayed fields do not exceed levels associated with convulsive twitching or mortality in larval amphibians; however, they do exceed concentrations associated with inactivity and fish and invertebrate mortality, which may indirectly affect larval amphibians.
机译：在实验室中暴露于esfenvalerate的豹蛙（Rana spp。）experienced在低至1.3μg/ L的浓度下活性降低，在3.6μg/ L的浓度下表现出抽搐，抽搐反应。 96小时平均致死浓度为7.29μg/ L。温度影响两栖动物死亡率； 22℃时死亡率浓度-反应斜率明显大于18℃时。暴露在池塘中的在与实验室测试生物相似的浓度下表现出相同的反应（不活动，抽搐和死亡）。实验室测试中存活下来的t被放入干净的水中1周后恢复了正常行为，但是在初次暴露期间表现出惊厥行为的大多数most最终死亡。 pond在池塘中幸存下来没有表现出更高的死亡率，而是呈现出负的密度-生长关系。在喷雾场附近的池塘和溪流中测得的拟除虫菊酯浓度不超过与抽搐或幼虫两栖动物死亡率相关的水平；但是，它们的浓度确实超过了与缺乏活动以及鱼类和无脊椎动物死亡相关的浓度，这可能间接影响幼虫两栖动物。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号