9300

• UCREFRP Catalog Number: 9300
• Author: Osmundson, D. B.
• Title: Importance of the 15-Mile Reach to Colorado River Populations of Endangered Fish.
• USFW Year: 1996.
• USFW - Doc Type: Grand Junction, CO.
• Copyright Material: NO

70
0 60
m 50
a)
40
0
30
0
z 20
am
Q
10
0
10
m
CO
-
a) 6
C
Z
4
am
a
2
ELECTROFISHING
ORT chub
BH suckers
FM suckers
DOWN GIVER
8
TRAM EL NETTING
0
7 6 5 4 3 2 1
Q TRATA
15-MILE REACH
Figure 2. Catch rates of the three principle native fish species inhabiting that portion of the
Colorado River occupied by Colorado squawfish. EI rofishing and trammel netting were used
to capture roundtail chub, flannelmouth sucker, and luehead sucker. The river was divided into
seven strata based on major changes in channel gradi nt. Westwater Canyon, strata No. 4, was
not sampled. The Grand Valley consists of Strata N . 6 and 7.
3