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<br />12/22/93 09:06 <br /> <br />-am 245 ~'~[!~~r <br />....,',:.:r.'>.: <br /> <br />FISH & WILDLIFE <br /> <br />. <br /> <br />14100 <br /> <br />, . <br /> <br />Justification for Species in Table 1 of Non-native Stocking Procedures <br /> <br />i1J salmon ids currently in the basin: potential interaction limited due to <br />salrnonids preference for cold water. Only artificial creation of suitable <br />salmonid habit allows these'fishes to be fOUnd In historic habitat of <br />endangered fishes. Host,'ltke1y association W<Juld be with adult Colorado <br />squawfish in Green and colQ~ado rivers or major tributaries. Salmonids would <br />be mare likely to be pre~ ~~~~, predator In these cases. <br />i.. "',;;::; <br />triolold 9rass carR: certlf,ltate of triploid sterility required before <br />stocking. Stocking sites mu~f, be isolated or screened from receiving rivers <br />to prevent escapement. Coul~:pose a threat to restoration of flooded <br />bottomland habitat if they 'escape into upper basin rivers. <br />. ". <br />redside shiner: currently:~sed as forage in some Wyoming ponds above Flaming <br />Gorge; not likely to pass through reservoir environment and outlet works (oeep <br />reservoir release at Flaming Gorge precludes virtually all warm-water fish <br />escapement). ' <br />~ ' . ; , . <br />threadfln shad: alrealb':-w~l:li'establfshed in Lake Powell. Ilot likely t~ <br />migrate and redlstribute~up~tream due to hostile riverine environment for this <br />species in Cllhnct Canvon;'l",.'li; <br />.. " i\:M'/;,~., <br />fathead minnow: $tockln~' ~~1~t~cted to water outside of areas designated as ~ <br />critical habitat that precT~a~,~Ecapement into waters within critical habitat. <br />These restrictions Justtfi~. o.~:!.i1ew information showing competition between <br />young-of-the-year color~a,~:~~u.~~fish and fathead minnow. <br />;~'~ It'~",}i :, ~,~.~~.. <br />. <',1' ~l t!..<(~ <br />small mouth bass: above .Flariiing"(;orge--same rationale as provided for redsid~ <br />ihlner {outlet works prec1qdesvlrtually all warm-water fish escapement)i <br />stocking allowed in standing waters separated from occupied endangered speCies <br />habitat (by water containi.n.~: e,,$~abllShed reprodUcing s'!1"l1mouth populations) <br />based on the preQIlse tha~.:t~",isist,ocking WIll nat contr1bute additional <br />smallll10Uth to occupied h,~bf..'tiL~'fabove what are already supplied by self- <br />sustaining popUlations in:riv~rfne or mainstem impoundment. <br />.j-r,. ~'\~'. / ,:: .' <br />,.,,";'" ." , <br />~JI i . <I ,\ \..: <br />'e blu ill ' ,.. s: stocking allowed in isolated Donds <br />an reservoIrs Wl no sur ace naction at high water'" to rivers in ' <br />the upper basin to prevent escape~nt_intD_apeas-whe~B_theY-canLCOmDete Wlth-)i l- <br />_r prey ..upon--endangere~,/ Separa.tion from occupied habitat criteria Vk7.J , <br />rationale same as for smal1mouth bass. <br /> <br />strjD~ bass: same justifi~atlon as used for threadfin shad (however <br />escapement of these predators could complicate recovery in the lower basin). \ <br />C T< / <br />0"" <br />channel catfish: above Flamin~ Gorge the rationale is the same as for redside ~~L~, ~~ <br />shiner and small mouth bass;"pther criteria in isolated ponds and reservoirs /t", ~ 'r.<.~ <br />with no escaplll11ent because reproduction by catfish is likely to be very good .c l. <- <br />in upper basin rivers and stocking would augment or supplement eXisting wild ~ 7.~ ~v <br />catfish papulations'lv/I~) l~ <br />: " re~vc.-- <br />Utah chub: can continue to:usa in Utah sub-basins where they currently exist <br />because that should not allow for additional range e~pansion. . <br /> <br />*Tor purposes of this document high water is defined consistent with critica' <br />habitat designation., ' fl ----u- <br />7"-0--' t L ~e... ...-I:e:t,{S. / 10\<-. ~ ,J 6Cl ,v'S <br /> <br />2.C) - 'tc9 '1 rs, \. <br />~, Nt:rr 2-.. Io\~ CVI.1(.r14 <br /> <br /> <br />r0< <br /> <br />\ <br />\)v <br /> <br />