Barber M Craig, Rashleigh Brenda, Cyterski Michael J
US Environmental Protection Agency, National Exposure Research Laboratory, Ecosystems Research Division, Athens, Georgia.
US Environmental Protection Agency, National Health and Environmental Effects Laboratory, Atlantic Ecology Division, Narragansett, Rhode Island.
Integr Environ Assess Manag. 2016 Jan;12(1):146-59. doi: 10.1002/ieam.1644. Epub 2015 Jul 17.
Regional fishery conditions of Mid-Atlantic wadeable streams in the eastern United States are estimated using the Bioaccumulation and Aquatic System Simulator (BASS) bioaccumulation and fish community model and data collected by the US Environmental Protection Agency's Environmental Monitoring and Assessment Program (EMAP). Average annual biomasses and population densities and annual productions are estimated for 352 randomly selected streams. Realized bioaccumulation factors (BAF) and biomagnification factors (BMF), which are dependent on these forecasted biomasses, population densities, and productions, are also estimated by assuming constant water exposures to methylmercury and tetra-, penta-, hexa-, and hepta-chlorinated biphenyls. Using observed biomasses, observed densities, and estimated annual productions of total fish from 3 regions assumed to support healthy fisheries as benchmarks (eastern Tennessee and Catskill Mountain trout streams and Ozark Mountains smallmouth bass streams), 58% of the region's wadeable streams are estimated to be in marginal or poor condition (i.e., not healthy). Using simulated BAFs and EMAP Hg fish concentrations, we also estimate that approximately 24% of the game fish and subsistence fishing species that are found in streams having detectable Hg concentrations would exceed an acceptable human consumption criterion of 0.185 μg/g wet wt. Importantly, such streams have been estimated to represent 78.2% to 84.4% of the Mid-Atlantic's wadeable stream lengths. Our results demonstrate how a dynamic simulation model can support regional assessment and trends analysis for fisheries.
利用生物累积与水生系统模拟器（BASS）生物累积和鱼类群落模型以及美国环境保护局环境监测与评估计划（EMAP）收集的数据，对美国东部大西洋中部可涉渡溪流的区域渔业状况进行了估算。对352条随机选取的溪流估算了年均生物量、种群密度和年产量。通过假设甲基汞以及四氯、五氯、六氯和七氯联苯的水体暴露量恒定，还估算了取决于这些预测生物量、种群密度和产量的实际生物累积因子（BAF）和生物放大因子（BMF）。以3个假定支持健康渔业的地区（田纳西州东部和卡茨基尔山鳟鱼溪流以及奥扎克山小口黑鲈溪流）的观测生物量、观测密度和估算的总鱼类年产量作为基准，该地区58%的可涉渡溪流被估算处于边缘或不良状态（即不健康）。利用模拟的BAF和EMAP汞鱼类浓度，我们还估算出，在汞浓度可检测的溪流中发现的游钓鱼类和自给性捕鱼物种中，约24%将超过0.185μg/g湿重的可接受人类消费标准。重要的是，据估算，这类溪流占大西洋中部可涉渡溪流长度的78.2%至84.4%。我们的结果表明了动态模拟模型如何能够支持渔业的区域评估和趋势分析。
