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<br />566 <br /> <br />Methods: <br /> <br />Channel Catfish Radio Tracking <br /> <br />Sampling protocol <br /> <br />Radio tracking flights will be conducted October 1996 through September 1997 to monitor <br />movement of 16 channel catfish implanted with radio transmitters in September 1996. For each <br />channel catfish contacted the date, time, river mile, latitude and longitude, and general habitat type <br />will be recorded. In addition to channel catfish, aerial tracking for razorback sucker will be done <br />opportunistically. <br /> <br />General Sampling Requirements: <br /> <br />No. of flights: 16 (one per month October - March, September: two per month April-- August) <br />Duration of each flight: 4-5 hrs <br />Personnel/flight: 1-2 <br /> <br />The radio tracking flights will be followed by intensive on-ground radio telemetry trips to monitor <br />channel catfish habitat use. Channel catfish will be tracked montWy(October 1996 through <br />September 1997) by boat or raft. For each fish contacted, the date, time, river mile, and habitat type <br />occupied will be recorded. Radio contact will continue at 15-20 minute intervals for a minimum of <br />four contacts (i.e., approximately one hour) per fish. - During each contact, the location and habitat <br />type occupied will be recorded onto an aerial videography sheet (over--layed in polypropylene) of the <br />San Juan River. Concurrent with the radio tracking, the habitat type 100 m upstream and <br />downstream of the most frequent location will also be mapped on each of the videography sheets to <br />determine habitat availability. Habitat type classifications will follow those defined by Bliesner and <br />Lamarra in geomorphology studies. In addition to mapping, habitat data including water depth, <br />velocity, substrate, temperature, salinity, dissolved oxygen, conductivity, proximity and type of cover <br />available will also be recorded. <br /> <br />General Sampling requirements: <br /> <br />No. of trips: 12 (one trip per month October through September) <br />Duration of each trip: 4-5 days <br />Personnel/trip: 2-3 <br /> <br />26 <br />