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26 <br />Attempts were made to collect fish from every habitat present in a <br />sample reach. The habitat from which each fish was collected, <br />was described by taking a series of depth and velocity measurements and <br />recording the substrate over which it was collected. Bottom substrates <br />are classified according to the following scheme: <br />Silt fine gritty material <br />Sand less than 3mm diameter <br />Gravel 3 mm to 76 mm <br />Rubble 76 mm to 305 mm <br />Boulder 305 mm and larger <br />Bedrock rock outcropping <br />Water quality measurements were taken at each intensive sample site. <br />These include dissolved oxygen (DO), turbidity, air and water temperatures, <br />salinity and conductivity. Such variable parameters as temperature, pH <br />and DO were taken between 10 a.m. and 2 p.m. for standardization. - <br />The 4.5 mile reach between intensive survey sites was sampled in a more <br />general manner primarily by electrofishing to provide a broad cross- <br />section of the fish population. Physical data were collected only at <br />sites of rare fish captures. <br />Biological Measurements <br />Each habitat present in the intensive reaches were sampled with every <br />effective gear type. Rare fish captures were located to the highest <br />level of precision possible and water depth, velocity measurements and <br />the predominent substrate type recorded. All fish collections are