邻近油砂活动的鱼类性能指标：对邻近油砂开采活动的阿尔伯塔省Steepbank河中粘杜父鱼性能指标的响应

自2009年以来，加拿大和阿尔伯塔省政府一直在制定Athabasca河下游及其支流（2010-2013年）地表水质量和水量的监测计划。这项对鱼类监测计划的贡献的目标是1）评估该河支流中鱼类的当前状态，2）识别上游参考物和油砂沉积物暴露位点之间存在的差异，和3）识别鱼类性能指标相对于历史研究的趋势和变化。本研究考察了阿尔伯塔省Steepbank河中粘杜父鱼（Cottus cognatus）在生长、性腺大小、生长状况和肝脏7-乙氧基甲氧基甲酰胺基脱氢酶（EROD）活性方面的鱼类性能指标，以此作为暴露于油砂相关化合物的指标。采样程序遵循历史采样方法（1999-2000年），随着开发的进展，随着时间的推移提供可比数据，同时增加一个上游参考位点（n=2）。2010年至2013年，从油砂矿床（n=2）内的Steepbank河下游收集的杜父鱼中记录到了一致的变化。杜父鱼的数据显示，肝脏增大的同时相应的EROD活性诱导与历史数据一致，与生殖发育和性腺类固醇生产能力相关的能量投资减少。没有一致的证据表明，随着露天采矿开发的增加使得鱼类性能指标发生了变化，特别是在Steepbank河中段附近。尽管在过去15年里，Steepbank河流域的物理开发有所增加，但这些结果与历史数据一致，表明开发区附近的水环境的响应程度没有改变。

Response in performance indicators of Slimy sculpin in the Steepbank River, Alberta, adjacent to oil sands mining activity

Since 2009, the Canadian and Alberta governments have been developing monitoring plans for surface water quality and quantity of the lower Athabasca River (LAR) and its tributaries (2010-2013). The objectives of this contribution to the fish monitoring program were to 1) assess the current status of fish in a tributary of the LAR, 2) identify existing differences between upstream reference and within the oil sands deposit exposure sites, and 3) identify trends/changes in fish performance indicators relative to historical studies. This study examines the fish performance indicators in Slimy sculpin (Cottus cognatus) in the Steepbank River, AB, in terms of growth, gonad size, condition, and hepatic 7-ethoxyresorufin-?-deethylase (EROD) activity as an indicator of exposure to oil- sands related compounds. The sampling program followed historical sampling methods (1999-2000) to provide comparable data over time with an additional upstream site (n=2) added as development progressed. Consistent changes were documented in sculpin collected from downstream sections of the Steepbank River within the oil sands deposit (n=2) in 2010 through 2013. Sculpin demonstrated increased liver size with corresponding induction of EROD activity consistent with historical data and reductions in energy investment relative to reproductive development and gonadal steroid production capacity. There was no consistent evidence of changes in fish performance indicators with increased surface mining development, particularly adjacent to the Steepbank River Mid site. Although physical development in the Steepbank watershed has increased over the last 15 years, these results are consistent with historical data suggesting the magnitude of the response in the aquatic environment adjacent to the development has not changed.