7824

• UCREFRP Catalog Number: 7824
• Author: Miller, W. H., et al.
• Title: Colorado River Fishery Project, Part III, Final Report, Contracted Studies.
• USFW Year: 1982.
• USFW - Doc Type: \
• Copyright Material: NO

FIGURES, Continued
•
Spawning Behavior, Habitat Selection, and Early
Life History of Northern Squawfish with
Inferences to Colorado Squawfish, Continued
Number Page
23 Frequency of occurrence histograms of schools of
juvenile northern squawfish over a range of
proportions composed by each of four substrate
particle size classes . . . . . . . . . . . . . . . . . . 78
24 Frequency of occurrence histograms of subadult
northern squawfish over a range of values for a
series of behavioral and habitat characteristics . . . . 80
25 Frequency of occurrence histograms of subadult
northern squawfish over a range of depths, velocities,
and substrate distances and within given distances of
other species of fish . . . . . . . . . . . . . . . . . . 81
26 Frequency of occurrence histograms of subadult
northern squawfish over a range of proportions
composed by each of four substrate particle size
classes . . . . . . . . . . . . . . . . . . . . . . . . . 82
27 Frequency of occurrence histograms of adult northern
squawfish over a range of values for a series of
behavioral and habitat characteristics . . . . . . . . . 84
28 Frequency of occurrence histograms of adult northern
squawfish over a range of depths, velocities, and
substrate distances and within given distances of

other species of fish . . . . . . . . . . . . . . . . . . •
85
29 Frequency of occurrence histograms of adult northern
squawfish over a range of proportions composed by
each of four substrate particle size classes . . . . . . 86
30 Total length (mm) frequency distribution of northern
squawfish sampled from the St. Joe River at
intervals between emergence and one year of age . . . . . 90
31 Percentages of the diet contributed by different groups
of organisms for northern squawfish sampled from the
St. Joe River at intervals between emergence and
one year of age . . . . . . . . . . . . . . . . . . . . . 94
32 Stomach fullness expressed in volume points per stomach
in comparison with hours of daylight (open bar),
darkness (shaded bar), and bright moonlight (hatched
bar) for samples collected at two-hour intervals on
a series of dates between emergence and one year of
age of northern squawfish from the St. Joe River . . . . 96
33 Fluctuations in the importance (expressed as a percentage
by number) of major food items over the course of the
day for St. Joe River squawfish on a series of dates
between emergence and one year of age . . . . . . . . 97
34 Fluctuations in the importance (expressed as a percentage
by number) of major food items over the course of the
day for St. Joe River squawfish on a series of dates
between emergence and one year of age . . . . . . . . . . 98
35 Configuration of the artificial stream channel •
system (only one channel shown) . . . . . . . . . . . . . 101
xiv