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razorback suckers from Senator Wash Reservoir, California. Measurements <br />were made in standard ways except for body depth and lip length (Hubbs <br />and Miller 1953). Body depth was measured just posterior to the apex of <br />the nuchal keel, and lip length was measured as the distance from the <br />front of the upper lip to the posterior-most extension of the right <br />lower lip. All measurements are expressed as permillage standard length. <br />Counts of principle dorsal fin rays were made on all razorback suckers <br />with undamaged dorsal fins. <br />Condition of eyes, ripeness, incidences of bacterial infections, <br />parasites, and other notable conditions were also recorded. Razorback <br />suckers were tagged below the dorsal fin with individually numbered <br />Carlin tags or caudal fin clipped and released near the site of capture. <br />Carlin tags were furnished by the Nevada Department of Wildlife. Special <br />note was made of recaptures throughout the study in an effort to <br />estimate population size. Stomachs were examined on carp and gamefish <br />netted in razorback sucker spawning areas to evaluate predation on egg <br />and larval stages of razorback suckers. Contents were preserved in 10% <br />formalin when eggs or egg material were found in the stomachs. Eggs were <br />enumerated volumetrically. <br />3.5 Larval Collections <br />Razorback sucker larvae were collected at night in spawning areas, <br />using a hand dip net and dive lights. Monthly sampling for larval <br />razorback suckers was conducted in 1983 in the Six Mile Coves area. <br />Sample sites were 45 m apart on a transect following the 1 m contour <br />over a shoreline spawning area. The collector illuminated a sample site <br />with a dive light and dipped up all larvae seen during a 15 minute <br />sample period with a hand net. The collector remained stationary during