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<br /> TABLE 6
<br />Occurrence of indigenous and introduced fish species before the closure of Flaming
<br />Gorge Dam, expressed as presence or absence in pre-impoundment surveys.
<br /> Location
<br /> I~ttle Willow Echo Island Split
<br /> Hole Bridgeport Creek Lodore Park Park Mt,
<br />Indigenous species
<br />Gila robusta 1 1 4 4 4,5 4,5 3,5
<br />Ptychocheilus Lucius 2 0 0 5 4,5 4,5 3,5
<br />Rhinichthys osculus 1 0 4 4 4,5 40,5 5
<br />Catostomus latipinnis 0 1 4 3,5 4,5 4- 3,4-
<br />Pantosteus discobolus 0 0 4 4 4,5 4 3,4-
<br />Xrrauchen texanus 0 0 4 .. 3 0 4-
<br />Catostomus X Xyrauchen 0 0 0 4 4 0 4-
<br />Cottus bairdi 0 0 0 0 0 4 0
<br />Introduced species
<br />Cyprinus carpio 0 0 1,4 3,4 4,5 4,5 3,4
<br />Pimeplwles promelas 0 0 4- 4 4- 0 0
<br />Riclwrdsonius balteatus 0 4- 4 4 4- 4- 4-
<br />Ictalurus punctatus 0 1 4- 4 4 4 4
<br />Ictalurus melas 0 0 1 0 4 0 4-
<br />Stiwstedion v, vitreum 0 0 0 0 0 0 3
<br />
<br />.0 = Not reported; 1 = McDonald and Dot..... (1960); 2 = DolSlJll, unpublished data, Utah State
<br />Department of Fish and Game; 3 = Azevedo, IDlpublished fishery management report, Bureau Sport
<br />FISheries and Wildlife; 4 = Banks (1964); and 5 = Binns et at. (1964).
<br />
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<br />Dinosaur National Monument in July and September-October, 1962,
<br />using gill nets, fyke nets, rotenone, electrofishing gear, and hook and
<br />line;
<br />4) Banks (1964): Collections made by students from Colorado State
<br />University from the Green River in Dinosaur National Monument,
<br />1961-1962, using gill nets, seines, rotenone, hook and line, and elec-
<br />trofishipg gear;
<br />5) Binns et ai. (1964): Collection by Utah State Department of Fish
<br />and Game personnel in Dinosaur National Monument in September
<br />1962, using seines and electrofishing gear.
<br />Eight indigenous (including one hybrid) and six exotic species were
<br />taken in the Green River from the Flaming Gorge damsite downstream
<br />through Dinosaur National Monument in these five pre-impoundment
<br />collections (Table 6), The indigenous species were Colorado squaw-
<br />fish, Colorado chub, speckled dace, humpback sucker, bluehead sucker,
<br />flannelmouth sucker, and mottled sculpin. The hybrid sucker was also
<br />reported. The six exotic species collected were carp, fathead minnow,
<br />redside shiner, channel catfish, black bullhead, and walleye. These
<br />fishes, with the exception of the hybrid sucker and walleye, were all
<br />
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