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_, e_".___,....",,~,_""'-.~.~ -~...""-- -.<'._.~--,~"'"'........'.' e e TABLE 4 Occurrence and relative abundance" of indigenous and introduced species after closure of Flaming Gorge Dam, 1963-1966 (data from present study) Number Little Bridge- Willow Echo Island Split oollectedf Hole port Creek Lodore Park Park Mt. Ouray Indigenous species Prosopium williamsoni 1 0 0 0 0 R 0 0 0 Gila robusta 2,420 0 0 R Oc C C C R Gila cypha 3 0 0 Rt 0 R R:t 0 0 Ptychocheilus Lucius 1,477 0 0 0 0 Oc Oc Oc Oc Rhinichthys osculus 3,823 0 R Oc C A A A Oc Catostomus latipinnis 1,851 R Oc Dc A A A C Dc Pantosteus discobolus 1,560 0 Oc Oc C C C A R ~ Xyrauchen texanus 73 0 0 0 0 Dc Dc Oc Oc . Catostomus X Xyrauchen 16 0 0 0 Oc Dc Oc Oc 0 Cottus bairdi 6 0 0 0 0 R 0 0 0 Introduced species 'Salmo trutta 9 0 'Dc 0 0 R 0 R 0 ;., - Salmo gairdneri 93 A A C C R 0 0 0 Cyprinus carpio 903 0 Oc Dc Dc Oc Dc Oc A Gila atraria 1 0 R 0 0 0 0 0 0 Pimephales promelas 2,492 Dc A C C C C C Dc Richardsonius balteatus 4,100 R C C C A A C Oc Semotilus atromoculatus 12 0 Dc Oc 0 R 0 R 0 Catostomus commersoni 96 0 0 0 0 Oc Oc 0 0 .. lctalurus punctatus 450 0 R 0 Dc C C C C lctalurus melas 139 0 R 0 0 R Dc R Oc Lepomis cyanellus 5 0 0 0 0 R R R R StiZDStedion v,' vitreum 5 0 0 0 0 R 0 R R .. . 0 = Not taken; R = Rare; Oc = Occasional; C = Common; A = Abundant. t Exclusive of larval and post-larval stages for all species except G, robusla and p, lucius. :j; Tentative identification. ...... '~ommon", and "abundant", based on total numbers captured (ex- cluding larval and post-larval fishes). Nine species of indigenous fishes were taken: mountain whitefish, Prosopium williamsoni (Girard); Colorado chub4, Gila robusta Baird and Girard; humpback chub, Gila cypha Miller; Colorado squawfish, Ptychocheilus lucius Girard; speckled dace, Rhinichthys osculus (Girard); flannelmouth sucker, Catostomus latipinnis Baird and Girard; bluehead sucker, Pantosteus discobolus (CopeS; humpback 4 No distinctions were made between the roundtail and bonytail forms of G. robusta and they were combined under their common name, Colorado chub (Sigler and Miller, 1963), 5 Recognized as Pantosteus delphinus (Cope) by Bailey et al. (1960), and as Catostomusdiscobolus Cope by Smith (1966). 306 .......'.- .".. _.~--_w______ ~_~~..."'_ __'~."~~>_~___ io> " . ~