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_ ~ _. _.. _.... _ ..,.... _ ,.. .......,, . _~. _.., m~_ . ~.._ ~_~~ti: _.:.., ..~._.... _....,~ ~_~_.,,...~__. _,_ .~_:,___.....__~:~ _ ~._. . 1$ WESTERN NORTH AMERICAN NATI)RALIST [Volume 60 Flaming Gorge Reservoir Wyoming Utah Colorado Yampa River ~ -'. DYrowur National eonlNxnos at ~ •~ Monument ~ Wn 555 on l1N Vernal GraenRNv ~=~ ~ ,_,-,.,Yampa River Duchesne River DesolatbNGray Canyon Spewnkp SIN Wn 232-258 \ Green River Price River San Rafael River spawn4g sra Rangely Colorado River / 80 Kilometers ' Gunnison 50 Miles River ~ . White River Relooatbn site for Utah ~ Colorado ~' ~ ~0" ~~. Lake Powell Green ~ River ~ \ WhRe Rarer ~ n.no.ry Taylor Draw Dam and Kerurey ReaervaM While Rfvar eon8uence at Ion 166 on the White River al an 396 on e ~ 1 the Green Rfvs- ~-, 5 Ml N t Fg. 1. Radio telemetry study area for 12 wild adult Colorado pikeminnow (Ptychochetlus lucius) tracked on the White, Green, and Yampa rivers, upper Colorado River basin, Colorado and Utah, 1992x1994. by Colorado pikeminnow (historic habitat) Locations of all 12 fish were monitored on before dam completion. We also translocated 2 the ground using a radio search-receiver with fish recaptured in September 1993, 1 from the bidirectional paddle antennas and from the air 1992 group and 1 from the 1993 group, into with fixed-wing aircraft with omni-directional ~ the lower reach of Kenney Reservoir (lan 169) loop antennas. Fish tracked on the ground were to determine if they would remain in the triangulated to the nearest 0.25 m; fish locations reservoir, pass through the reservoir, or access tracked by air were estimated to the nearest upstream habitats. 0.4 km (based on transmitter pulse rate, signal _~ '" a i ~C; y 'i 1 n( Y~ ~'ti )~ r ).r }+r';.y i ~ n Ky ~ti~, ~ 3r~r i k ' i s~~~ y, -_~A4a.,'~~.~w~~ ~ 1,\1~ i~1.c 'k`~_~~~~.~~t~t It z~,S~~~ ~ •'t~~ •`~i i-~ L ,y-,' ~ ~..! ~ .-~, ,:+ i. r ~~'~ `~ j, ! h~~-jY~t •~~fN4 ~,t\~,ti*V`w~ i~Y' e : ~'"'y~~t~ti~'~~ 31x7 tt.Y~.. ~ z ~ ~. :~ ~ e .., , y~`~,,~,~~ { ~._y ~ } ,~ti~'~~: ~ 1'3~~dFY~~:~a'~~RA~z'rc~.\'l~l`,i't4i'~.Sdi~~`li:.i~1~".~~~.ld~~~~..~4.~`ti'!_ei4~^Fi~'^'.'i31.4.fa~.TPM~s~.~ `~a.'~.?.~