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USEPA REGION 10 REGIONAL ENVIRONMENTAL MONITORING AND ASSESSMENT PROGRAM: FISH
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The USEPA designed and implemented the Environmental Assessment Program (EMAP) to determine the current status, extent, changes, and trends in indicators of the condition of the Nations ecological resources on regional and national scales with known confidence. USEPA Region 10s Regional Environmental Monitoring and Assessment Program (REMAP) adapted EMAP procedures for inland surface waters for use at the regional level. The REMAP is a cooperative program between USEPA Region 10, the Washington Department of Ecology, and the Oregon Department of Environmental Quality. Sample sites were selected with a randomized, systematic design using Region 10s Reach File 3 as the basis of the stream population. The sample population was restricted to wadeable streams represented by the blue- line stream network on USGS 1:100,00 maps. In 1994, 60 sites were sampled in the Coast Range Ecoregion (30 sites per state) and 15 sites were sampled in the Yakima River Basin. The study was repeated in 1995. In 1996, only Oregon conducted sampling; 30 sites in the Coast Range Ecoregion. Fish were collected at each stream reach using single-pass electrofishing techniques. Electrofishing was supplemented by block netting and seining in habitats where flow, substrate, and structure affected the capture of benthic fish species. Fish were identified, counted, measured to the nearest mm (total length), and examined for external anomalies. Fish were classified as Adult, Young of Year (YOY), and Juvenile. Other related data sets (water chemistry, benthic macroinvertebrates, physical habitat) are also available for this study and can be linked with this data set.