...
  • 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 PROPOSED PHYSICAL BALLAST TANK TREATMENTS ON AQUATIC INVERTEBRATE RESTING EGGS
【24h】

EFFECTS OF PROPOSED PHYSICAL BALLAST TANK TREATMENTS ON AQUATIC INVERTEBRATE RESTING EGGS

机译：拟议的物理镇流器处理对水生无脊椎动物休息蛋的影响

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

Adaptations in aquatic invertebrate resting eggs that confer protection from natural catastrophic events also could confer protection from treatments applied to ballast water for biological invasion vector management. To evaluate the potential efficacy of physical ballast water treatment methods, the present study examined the acute toxicity of heat (flash and holding methods), ultraviolet (UV) radiation (254 nm), and deoxygenation (acute and chronic) on resting eggs of the freshwater cladoceran Daphnia mendotae and the marine brine shrimp Artemia sp. Both D. mendotae and Artemia sp. were similarly sensitive to flash exposures of heat (100% mortality at 70℃), but D. mendotae were much more sensitive to prolonged exposures. Exposure to 4,000 mJ/cm~2 of UV radiation resulted in mortality rates of 59% in Artemia sp. and 91% in D. mendotae. Deoxygenation to an oxygen concentration of 1 mg/L was maximally toxic to both species. Deoxygenation suppressed hatching of D. mendotae resting eggs at oxygen concentrations of less than 5.5 mg/L and of Artemia sp. resting eggs at concentrations of less than 1 mg/L. Results suggest that UV radiation and deoxygenation are not viable treatment methods with respect to invertebrate resting eggs because of the imprac-ticality of producing sufficient UV doses and the suppression of hatching at low oxygen concentrations. Results also suggest that the treatment temperatures required to kill resting eggs are much higher than those reported to be effective against other invertebrate life stages and species. The results, however, do not preclude the effectiveness of these treatments against other organisms or life stages. Nevertheless, if ballast tank treatment systems employing the tested methods are intended to include mitigation of viable resting eggs, then physical removal of large resting eggs and ephippia via filtration would be a necessary initial step.
机译：赋予水生无脊椎动物静息卵以抵御自然灾难性事件的适应力，还可以保护其免受压舱水的处理，以进行生物入侵媒介管理。为了评估物理压舱水处理方法的潜在功效，本研究检查了热（闪蒸和保温方法），紫外线（254）紫外线（254 nm）和脱氧（急性和慢性）对仔猪静息卵的急性毒性。淡水枝ado水蚤和海洋卤水虾Artemia sp.。门氏杆菌和Artemia sp。对热的暴露同样敏感（70℃下100％的死亡率），但门氏杜鹃对长时间的暴露更敏感。暴露于4,000 mJ / cm〜2的紫外线辐射下，卤虫的死亡率为59％。在门氏石D中占91％。脱氧至1 mg / L的氧气浓度对两种物质均具有最大毒性。脱氧抑制了氧气浓度低于5.5 mg / L的门氏石resting休息卵和Artemia sp。的孵化。静息卵浓度低于1 mg / L。结果表明，对于无脊椎动物的卵来说，紫外线辐射和脱氧不是可行的处理方法，因为无法产生足够的紫外线剂量并且在低氧浓度下抑制孵化。结果还表明，杀死静息卵所需的处理温度要比据报道对其他无脊椎动物生命阶段和物种有效的处理温度高得多。但是，结果并不排除这些疗法对其他生物或生命阶段的有效性。但是，如果采用测试方法的压载水舱处理系统旨在减轻可行的静息卵，那么通过过滤将较大的静息卵和ephippia进行物理去除将是必要的初始步骤。

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