8036

• UCREFRP Catalog Number: 8036
• Author: Haynes, C. M., R. T. Muth and G. T. Skiba.
• Title: Identification of Habitat Requirements and Limiting Factors for Colorado Squawfish and Humpback Chubs ‎(July 1 1982 to June 30 1983)‎.
• USFW Year: 1983.
• USFW - Doc Type: \
• Copyright Material: NO

Table 6. Numbers, percentages of the total,and frequency of occurrence of fish
collected during 1982 ichthyoplankton sampling in the Black Rocks area of Ruby
Canyon (river kilometer 219.8> 218.2), Colorado River, Colorado and in Dinosaur
National Monument (river kilometer 72.4 >0.0), Yampa River, Colorado.
N Percent of Frequency of
fish total number occurrence
Fish taxa sampled sampled (%)a
Colorado River
Cyprinidae 67 57 34
Speckled dace,Rhinichthys osculus* 32 27 25
Gila spp.* 30 25 21
Colorado squawfish,Ptychocheilus lucius* 2 2 4
Fathead minnow,Pimephales promelas 1 1 2
Common carp,Cyprinus carpio 1 1 2
Roundtail chub, Gila robusta~' 1 1 2
Catostomidae 43 36 33
Bluehead sucker, Catostomus discobolus* 35 29 29
Flannelmouth sucker, C. latipinnis* 8 7 15
Ictaluridae 7 6 10
Channel catfish,Ictalurus punctatus 7 6 10
Centrachidae 1 1 2
Green sunfish,Lepomis cyanellus i 1 2
Total 118
Yampa River
Cyprinidae 86 61 69
Gila spp.* 75 53 54
Speckled dace,Rhinichthys osculus* 9 6 38
Red shined Notropis lutrensis 1 1 8
Sand shiner, N. stramineus 1 1 8
Catostomidae 7 5 23
Bluehead sucker, Catostomus discobolus* 4 3 23
Flannelmouth sucker, C. latipinnis-~ 3 2 15
Ictaluridae 47 34 46
Channel catfish,Ictalurus punctatus 47 34 46
Total 140
a Based on 48 samples for the Colorado P.iver and 13 samples for the Yampa
River.
*
Native species