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首页> 外文期刊>Environmental toxicology and chemistry >ENVIRONMENTAL CONTAMINANT EFFECTS ON JUVENILE STRIPED BASS IN THE SAN FRANCISCO ESTUARY, CALIFORNIA, USA
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ENVIRONMENTAL CONTAMINANT EFFECTS ON JUVENILE STRIPED BASS IN THE SAN FRANCISCO ESTUARY, CALIFORNIA, USA

机译：美国加利福尼亚州旧金山河口少年条纹鲈鱼的环境污染影响

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摘要

The decline of pelagic organisms in the San Francisco Estuary (SFE) (California, USA) is attributed to several factors, including water diversions, invasive species, and exposure to environmental toxicants. The present study evaluated the effects of environmental contaminants on liver vitellogenin, metallothionein, 7-ethoxyresorufin-O-deethylase (EROD), and benzyloxyresorufin 'O-deethylase (BROD) activity in juvenile striped bass (Morone saxitilis) in the SFE. Analysis of juvenile striped bass liver extracts revealed site-specific elevations of vitellogenin, metallothionein, and EROD biomarkers across the estuary. Although some striped bass in the estuary showed EROD activity similar to unhandled hatchery controls, several sites in the estuary showed significantly higher EROD activity that was in the range of beta-naphthoflavone (BNF)-injected, positive controls. Overall, EROD activity averaged 283% higher in estuary fish than in hatchery controls. Chemical analyses of extracts from semipermeable membrane devices (SPMDs) deployed in the estuary for one month showed elevated poly aromatic hydrocarbon (PAH) levels. Semipermeable membrane devices extract injections-induced metallothionein and BROD in striped bass livers. These data show that environmental exposures are impacting EROD and other biomarkers in the SFE striped bass population. Previous studies in our laboratory have associated poor larval development with maternal transfer of environmental contaminants. Further studies are needed to monitor contaminant exposures by the use of biomarkers and to integrate them into a more effective pelagic species recovery plan in the SFE.
机译：旧金山河口（SFE）（美国加利福尼亚州）中的浮游生物的减少归因于多种因素，包括引水，入侵物种和暴露于环境毒物。本研究评估了环境污染物对SFE中幼年鲈鱼鲈鱼（Morone saxitilis）中肝卵黄蛋白原，金属硫蛋白，7-乙氧基间苯二酚-O-脱乙基酶（EROD）和苄氧基间苯二酚的O-脱乙基酶（BROD）活性的影响。少年条纹鲈鱼肝提取物的分析揭示了整个河口特定部位的卵黄蛋白原，金属硫蛋白和EROD生物标志物升高。尽管河口一些条纹鲈鱼的EROD活性类似于未处理的孵化场对照，但河口的几个部位显示EROD活性明显更高，处于注射β-萘黄酮（BNF）阳性对照的范围内。总体而言，河口鱼的EROD活性平均比孵化场的对照高283％。在河口部署了一个月的半透膜装置（SPMD）提取物的化学分析显示，多环芳烃（PAH）含量升高。半透膜设备可在条纹鲈鱼肝脏中提取注射诱导的金属硫蛋白和BROD。这些数据表明，环境暴露正在影响SFE条纹鲈种群中的EROD和其他生物标记。我们实验室先前的研究表明，幼虫发育不良与母体环境污染物的转移有关。需要进一步研究以通过使用生物标志物监测污染物暴露并将其纳入SFE中更有效的浮游物种回收计划中。

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