...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Environmental stresses and skeletal deformities in fish from the Willamette River, Oregon
【24h】

Environmental stresses and skeletal deformities in fish from the Willamette River, Oregon

机译：俄勒冈州威拉米特河鱼类的环境压力和骨骼畸形

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

The Willamette River, one of 14 American Heritage Rivers, flows through the most densely populated and agriculturally productive region of Oregon. Previous biological monitoring of the Willamette River detected elevated frequencies of skeletal deformities in fish from certain areas of the lower (Newberg pool [NP], rivermile [RM] 26-55) and middle (Wheatland Ferry [WF], RM 72-74) river, relative to those in the upper river (Corvallis [CV, RM 125-138). The objective of this study was to determine the likely cause of these skeletal deformities. In 2002 and 2003, deformity loads in Willamette River fishes were 2-3 times greater at the NP and WF locations than at the CV location. There were some differences in water quality parameters between the NP and CV sites, but they did not readily explain the difference in deformity loads. Concentrations of bioavailable metals were below detection limits (0.6-1 mu g/ Q. Concentrations of bioavailable polychlorinated biphenyls (PCBs) and chlorinated pesticides were generally below 0.25 ng/L. Concentrations of bioavailable polycyclic aromatic hydrocarbons were generally less than 5 ng/L. Concentrations of most persistent organic pollutants were below detection limits in ovary/oocyte tissue samples and sediments, and those that were detected were not significantly different among sites. Bioassay of Willamette Riverwater extracts provided no evidence that unidentified compounds or the complex mixture of compounds present in the extracts could induce skeletal deformities in cyprinid fish. However, metacercariae of a digenean trematode were directly associated with a large percentage of deformities detected in two Willamette River fishes, and similar deformities were reproduced in laboratory fathead minnows exposed to cercariae extracted from Willamette River snails. Thus, the weight of evidence suggests that parasitic infection, not chemical contaminants, was the primary cause of skeletal deformities observed in Willamette River fish.
机译：威拉米特河是美国的14条传统遗产河流之一，流经俄勒冈州人口最稠密，农业生产最多的地区。先前对威拉米特河进行的生物监测发现，在下部某些地区（纽伯格河[NP]，里弗里尔[RM] 26-55）和中部（麦田轮渡[WF]，RM 72-74）的某些地区，鱼类骨骼畸形的频率升高相对于上游河流（Corvallis [CV，RM 125-138）。这项研究的目的是确定这些骨骼畸形的可能原因。在2002年和2003年，威拉米特河鱼类的畸形载荷在NP和WF位置比在CV位置大2-3倍。 NP和CV站点之间的水质参数存在一些差异，但是它们不能轻易解释形变载荷的差异。可生物利用金属的浓度低于检出限（0.6-1μg/ Q。可生物利用的多氯联苯（PCB）和氯化农药的浓度通常低于0.25 ng / L。可利用的多环芳烃的浓度通常低于5 ng / L卵巢/卵母细胞组织样本和沉积物中大多数持久性有机污染物的浓度均低于检出限，且各部位检出的检出物无显着差异。威拉米特河水提取物的生物测定未提供证据表明存在未鉴定的化合物或复杂的化合物混合物提取物中的三聚氰胺可能会引起鲤科鱼类的骨骼畸形，但是，在两个威拉米特河鱼类中检测到的双基因吸虫的尾cer与大量畸形直接相关，暴露于威拉米特河的尾暴露于实验室的黑头min鱼中也再现了类似的畸形。蜗牛，因此，大量证据表明，寄生虫感染而非化学污染物是在威拉米特河鱼类中观察到的骨骼畸形的主要原因。

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