7193

• UCREFRP Catalog Number: 7193
• Author: Nesler, T. P.
• Title: Aquatic Nongame Research, Squawfish-Humpback Studies.
• USFW Year: 1987.
• USFW - Doc Type: Fort Collins, Colorado.
• Copyright Material: NO

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Table 1. Seine sampling for YOY Colorado squawfish in the Colorado
River, 1986.
River No. Area No. YOY Mean elf Std. Total length
reach samples seined collected (II I 100m2) Dev. Mean Range
(m2) (mm)
PRlMAR Y BACKWATERS
Upper'! 12 670 24 3.14 6.66 24 20-29
Lowera 29 1000 125 9.77 17 . 21 27 17-38
SECONDARY BACKWATERS
UppezoB. 10 450 8 3.02 5.82 26 19-33
LowezoB. 11 436 67 18.50 21.86 29 21-39

aUpper refers to RM 140-170; Lower refers to RM 0-110.

Table 2. Total numbers, mean elf, and standard deviation of other
fish species collected by seines in the Colorado River,
1986.
Total Mean elf Std. Total Mean elf Std.
Species no. (II/100m2) Dev. Species no. ( Dl100m2) Dev.
Bluehead Speckled
sucker 350 13.44 11.9 dace 141 6.97 10.5
Flanne1- Large-
mouth 7 0.17 0.2 mouth 1 0.03 0.06
sucker bass
Red Green
shiner 112 2.96 2.5 sunfish 35 1.00 1.7
Sand
shiner 43 1.46 1.5 Gila sp. 77 2.25 0.7
Carp 8 0.24 0.3 Gambusia 2 0.08 0.2
Fathead
minnow 1408 56.01 103.4