8188

• UCREFRP Catalog Number: 8188
• Author: Muth, R. T., et al.
• Title: Flow and Temperature Recommendations for Endangered Fishes in the Green River Downstream of Flaming Forge Dam.
• USFW Year: 2000.
• USFW - Doc Type: \
• Copyright Material: NO

Final Report

4-3

September 2000

Table 4.1.-Native fishes in the Green River between Flaming Gorge Dam and the Colorado
River confluence.

Family and
Common Name

Scientific
Name

Present Distribution in the Green
River System and Comments3

Cyprinidae
Humpback chub

Gila cypha

Bonytail

Gila elegans

Roundtail chub

Gila robusta

Colorado pikeminnow

Ptychocheilus lucius

Speckled daceb

Rhinichthys osculusb

Catostomidae

Bluehead sucker

Catostomus discobolus

Federally listed as endangered. Population
concentrations are located in the Green River in
Desolation and Gray Canyons and the Yampa River in
Yampa Canyon. The fish is incidental in the Green
River in Whirlpool and Split Mountain Canyons; in the
Yampa River in Cross Mountain Canyon; and in the
lower Little Snake River. Highly adapted to life in
canyon environments. Adult habitat includes deep
pools and shoreline eddies; young occupy warm, quiet
habitats such as backwaters and eddies.

Federally listed as endangered. It is considered
extirpated in the Green River system but may persist in
extremely low numbers in the main stem. It is
considered adapted to main-stem rivers, where it has
been observed in pools and eddies.

Widespread, found in streams and rivers with warmer
water. It is generally rare in the middle and extreme
lower Green River; common to abundant elsewhere.
Adult habitat includes riffles, runs, pools, eddies, and
backwaters with silt-cobble substrate and adjacent to
higher-velocity areas. Young occupy low-velocity
shoreline habitats.

Federally listed as endangered. It is widely distributed
in warm-water reaches of the Green River and lower
sections of larger tributaries. Adult habitat includes
deep, low-velocity runs, pools, and eddies or seasonally
flooded lowlands. Young occupy low-velocity, shallow,
shoreline habitats (e.g., backwaters).

Widespread, common to abundant. It occupies
permanent or intermittent cool- or warm-water streams
and rivers and small to large lakes. In streams and
rivers, adults are generally found in shallow runs and
riffles with rocky substrates. Young occupy 10w-
velocity shoreline or seasonally flooded habitats.

Widespread, common to abundant. It is found in a
variety of habitats, ranging from cool, clear streams to
warm, turbid rivers. Adults prefer deep riffles or
shallow runs over rocky substrates. Young occupy 10w-
velocitv shoreline or seasonally flooded habitats.

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