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<br />1 '-'0 ~ <br />J.J....l <br /> <br />5.) <br /> <br />Remove nonnative fish species which prey upon and compete v <br />species in the San Juan River. <br /> <br />6.) Finalize report for results and findings from 1991-1997 adult mOll <br />Produce a report for results and findings of 1998 adult monitoril <br /> <br />Methods: <br /> <br />Cc let <br /> <br />Objectives 1-6: One adult/juvenile sampling trip will take place in fall 1999.. T <br />sample from the Animas River confluence (New Mexico) to Clay Hills C <br />Electrofishing will be the primary sampling technique, although seining and tramr <br />also be employed. Radio tracking will be conducted on the adult/juvenile me <br />there are rare fish with active radio tags. <br /> <br />CollectioIl <br /> <br />All fish sp :i1I <br />of Fishes, '- . <br />of New M ... <br /> <br />Two oar-powered rafts, with one netter each, will electrofish in a continuo <br />fashion, with one raft on each far shoreline. No outboard motors will be used. 1 <br />will consist of approximately 10-13 people (4 for electrofishing, 3-4 for baggagl <br />for other research elements that are being done simultaneously with c <br />Electrofishing will be conducted in a continuous downstream fashion, sampling t <br />three miles (approximately 120 total sampled miles). All fish collected will.be <br />species and life stage every sampled mile. Every fifth sampled mile (designatet <br />collected will be weighed, measured, and sexed if possible. All native fish Cl <br />returned alive to the river. All nonnative fish collected will be removed from <br />predatory lacustrine fishes (ie. - walleye, striped bass, largemouth bass, small m <br />collected will be weighed, measured, and have stomach contents taken, before <br />from the river. Tag numbers, total length, and weight will be recorded on <br />FLOY-tagged fish (both native and nonnative), as well as any rare fish collec <br />pikeminnow, roundtail chub, and wild razorback sucker greater than 200 n <br />implanted with PIT (Passive Integrated Transponder) tags. Wild, adult Colora <br />will also be implanted with radio transmitters. Wild, adult razorback sucker v <br />from the river and taken into captivity for use in captive broodstock developml <br />be kept on any parasites and/or abnormalities observed on collected fishes. <br /> <br />Study An <br /> <br />The two d ft- <br />Mexican ~ <br />we will esj )li <br />near RM 1 7 <br />the reach ~ <br /> <br />Backl!l"ouj <br /> <br />Beginning \1 <br />Biology (~ <br />larval fish-as <br />of Wildlifi R.~ <br />I <br />from this I <br />Juan Rivel 11 <br />approxim~ :~, <br />effects of <br />could also Ie <br />previousl),l. <br />reproductl <br />processed nd <br /> <br />Radio tag implantation and fish transport will follow the protocols attached to the <br />Seven Year Research Plan. Electrofishing will follow the methods set forth a1 <br />long term monitoring plan. Seining and trammel netting will be done where su <br />available at the sampling crews' discretion. The Service will have the lead <br />monitoring trips and other cooperating agencies will provide personnel and equip <br />Costs for cooperating agencies are not included in this budget. <br /> <br />Products: <br /> <br />A draft of the final report for the 1991-1997 adult/juvenile monitoring study is <br />available by January 1999. A draft report for adult/juvenile monitoring trips CO] <br /> <br />Work Plan: {9' <br /> <br />Work Plan FY99.wpd <br /> <br />3 <br /> <br />Budget ane <br />