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I I I I I I I I I I I I I I I I I I I June larval collections (Appendix Figure C.1 0). Redside shiner and sand shiner probably spawned in early June because their larvae were collected in mid June (Appendix Figures C.6-C.7) and red shiner spawned in early July because their larvae where collected in mid July (Appendix Figure C.8). Spawning of common carp and channel catfish was not confirmed because neither species was observed in spawning condition and no larvae were collected. Population Estimate for the Upper Site On July 12 and 13, a pool at the upper site (RK 102) was sampled by depletion methods during an extremely low discharge (0.02 m3/sec). Water temperature was 14.50C, conductivity 1080 jJS, pH 8.4 and visibility was 1.2 m (max. depth). Prior to sampling, one person snorkeled the reach for about 15 minutes and observed only about 10 fish, mostly suckers. The reach was effectively blocked with nets and we believe no fish escaped during sampling. Four electrofishing passes were conducted and time required for each successive pass was 70 min, 50 min, 45 min, and 35 min. All habitat was uniformly covered on each pass and subsequent passes required less time due to decreasing number of fish handled. All fish captured were longer than 90 mm. About ten mottled sculpin adults were observed but not captured because they were smaller than the dipnet mesh. Native species comprised 87% of the sampled population estimated at 310 individuals of six species (Appendix D). Flannelmouth sucker were the most abundant species captured, followed by other natives including bluehead sucker and roundtail chub. Nonnative fishes were much less abundant and included channel catfish, white sucker, and common carp. Total weight of all fish collected was 67 kg. Total weights of each species were: flannelmouth sucker (26 kg), bluehead sucker (16 kg), common carp (10 kg), roundtail chub (8 kg), channel catfish (6 kg), and white sucker (1 kg). 18