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1993 Kenney Res. Channel Catfish Study Report Page 5 the upstream end of the reach. All channel catfish and Colorado squawfish encountered were captured, if possible, using long handled dipnets and placed into an onboard live tank for data processing. Other fish species encountered were not collected or enumerated. Various settings in DC pulse were used on the WP 15 in an attempt to improve the catch of catfish. A low voltage and amperage technique (<200 volts, 3 amps, 70-80$ pulse width, and 20 pulses per second) that has been used successfully in Arizona on flathead catfish (Brad Jacobson, personal communication, Arizona Game and Fish Department). was tried numerous times. However this technique was eventually discontinued because the observed results were unimpressive. A WP setting of 190-200 volts, 3 amps; 20~ pulse width, and 60 pulses per second appeared to most consistently produce catfish and was used a majority of the time. Electrofishing was conducted on July 7, 8, 12, 13, 14, and 15. On these dates the water temperatures and conductivities ranged between 21-22°C and 310-420 micromhos. Hoop nets were fished for 24 hour sets. The nets-were placed in slow moving pools that were deep enough to cover the hoops. Bait was mackerel flavored cat food, carp chunks, or fresh shrimp. Hoop nets were set on July 7, 8, 9, 13, 14, 15, and September 1, 2, and 3. All channel catfish captured by electrofishing and in hoop nets were examined for an adipose fin clip, measured to TL, weighed, recorded, and released. Catfish longer than 12 inches TL (305 mm) received an individually numbered Floy tag. At the recommendation of Tom Pellett (personal communication, Wisconsin Department of Natural Resources) the minimum i2 inch size to Floy tag river fish (as compared to 10 inches in the reservoir) was done to increase the potential for survival of tagged fish in the flowing, riverine environment. Catfish shorter than 12 inches TL received a punch hole mark in' the caudal fin rather than a spinal clip as for reservoir catfish less than 10 inches TL so reservoir fish could be identified if they appeared in the river. Data on all Floy-tagged catfish are presented in Appendix B. V. Results The sampling effort for 1993 was 2171 hours of actual fishing time. Table 1 shows the breakdown of effort by gear type and waterbody. Electrofishing effort was measured in seconds of operation by a meter on the WP 15 voltage pulsator and later converted to hours. Effort for trammel and gill netting represents a combination of