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3. White River <br />Stratum Length (km) Length (mi) Range (mi) <br />V 2$.2 17.5 132.5- 150.0 <br />W 62.0 38.3 94.2- 132.5 <br />X 55.8 34.9 59.3- 94.2 <br />Y 61.1 38.0 21.3- 59.3 <br />Z 34.3 21.3 0.0- 21.3 <br />Electrofishing was standardized with respect to gear and sampling method. <br />Strata were sampled with a Coffelt Company VVP-15, and a 4500 - 5000 Kw (11 <br />horsepower) gasoline generator connected to a boomshocker boat. All samples <br />were obtained by continuous downstream shocking of shoreline areas with no <br />attempt made to increase efficiency (and bias) by "herding" or "sneaking" up <br />on fish. Sampling was not conducted around islands. <br />All rare and endangered fishes were weighed, measured and tagged with <br />Carlin dangler tags prior to release. Tags were numbered and color coded for <br />each river. Carlin tags were double tied with polypropylene line and threaded <br />on needles. Needles were then passed through the dorsal musculature of the <br />fish at a point about 3 mm below the insertion of the last few dorsal fin rays <br />and spanning at least two interneural rays (as illustrated in Archer et al. <br />1980). The thread was then tied using a surgeon's knot. <br />General habitat and substrate information (Table 1) was recorded for all <br />fishes collected, but primary emphasis was placed on the rare and endangered <br />species. <br />RADIOTELEMETRY <br />Habitat use by adult Colorado squawfish and razorback sucker was <br />evaluated using radiotelemetry methods from 1990-1985. Adults were collected <br />11 <br />