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I I I I I I I I I I I I I I I I I I I 5.) Remove nonnative fish species which prey upon and compete with native fish species in the San Juan River. 6.) Finalize report for results and findings from 1991-1997 adult monitoring studies. Produce a report for results and findings of 1998 adult monitoring field work. Methods: Objectives 1-6: One adult/juvenile sampling trip will take place in fall 1999. The fall trip will sample from the Animas River confluence (New Mexico) to Clay Hills Crossing, Utah. Electrofishing will be the primary sampling technique, although seining and trammel netting may also be employed. Radio tracking will be conducted on the adult/juvenile monitoring trip if there are rare fish with active radio tags. Two oar-powered rafts, with one netter each, will electrofish in a continuous downstream fashion, with one raft on each far shoreline. No outboard motors will be used. Sampling crews will consist of approximately 10-13 people (4 for electrofishing, 3-4 for baggage rafts, and 2-5 for other research elements that are being done simultaneously with our sampling). Electrofishing will be conducted in a continuous downstream fashion, sampling two out of every three miles (approximately 120 total sampled miles). All fish collected will be enumerated by species and life stage every sampled mile. Every fifth sampled mile (designated mile), all fish collected will be weighed, measured, and sexed if possible. All native fish collected will be returned alive to the river. All nonnative fish collected will be removed from the river. All predatory lacustrine fishes (ie. - walleye, striped bass, largemouth bass, small mouth bass, etc.) collected will be weighed, measured, and have stomach contents taken, before being. removed from the river. Tag numbers, total length, and weight will be recorded on all recaptured, FLOY-tagged fish (both native and nonnative), as well as any rare fish collected. Colorado pikeminnow, roundtail chub, and wild razorback sucker greater than 200 mm TL will be implanted with PIT (Passive Integrated Transponder) tags. Wild, adult Colorado pikeminnow will also be implanted with radio transmitters. Wild, adult razorback sucker will be removed from the river and taken into captivity for use in captive broodstock development. Notes will be kept on any parasites and/or abnormalities observed on collected fishes. Radio tag implantation and fish transport will follow the protocols attached to the San Juan River Seven Year Research Plan. Electrofishing will follow the methods set forth above and in the long term monitoring plan. Seining and trammel netting will be done where suitable habitat is available at the sampling crews' discretion. The Service will have the lead for these adult monitoring trips and other cooperating agencies will provide personnel and equipment as needed. Costs for cooperating agencies are not included in this budget. Products: A draft of the final report for the 1991-1997 adult/juvenile monitoring study is expected to be available by January 1999. A draft report for adult/juvenile monitoring trips conducted in 1998 Work Plan FY99.wpd 3 Budget and Work Plan FY99