8140

• UCREFRP Catalog Number: 8140
• Author: May, B. E., J. D. Leppink and R. S. Wydoski.
• Title: Distribution, Systematics and Biology of the Bonneville Cutthoat Trout,
• USFW Year: 1978.
• Copyright Material: NO

any living thing. Elithough the early str~ dies of food preferences were sc~tr,ewlaat
limited in scope, they did provide a common conclusion. S. c. utah, found in both
river and Pake environments, were relatively non-selective in their feeding
habits and other native fish were an integral part of the diets of lake popula-
tions.
Recent efforts to document food habits have been restricted to a few popula-
tions of S. c. Utah found in small isolated streams. During June 1975, stomachs
were examined from 39 cutthroat collected from Birch Creek, Beaver County,
Utah. Specimens ranged from 58 to 200 mm (2-8 inches) in length and from 4 to
96 g (.140 to 3.4 oz.) in weight. Both terrestrial and aquatic invertebrates were
Trout Cr.
Pine Cr.
Goshute Cr.
Hendrys Cr.
Raymond Cr
Birch Cr.
Willow Cr.
Water Canyon
Reservoir Canyon
0.87 9.30 19.48 29.65 39.83 50.0016.00 17.80 19.60 21.40
Basibranchial Teeth Gillrakers
Trout Cr. L~
Pine Cr.
G
h
t
C
os
u
e
r.
Hendrys Cr. l__
Raymond Cr.
Birch Cr.
Willow Cr.

Water Canyon II
L~
Reservoir Canyon
24 .00 30.40
Pyloric Caeca
36.80 43.20 49.60 56.00 33.00 35.60 38.20 40.80 43.40 46.00
Scales above Lateral Line

l ~\y,'

.~ J

e~~ I
SK
. ~ ~
i
Figure 2. Meristic counts of basibranchial teeth, gillrakers, pyloric caecae, and scales above the lateral line
for various populations of cutthroat trout from Utah and adjoining states. (The dark line indicates the
population mean, the shaded area of each bar indicates one standard deviation, and the entire bar indicates
the range for each fish population). (Data from Behnke 1976a, 1976b; Hickman 1977)
9
23.20 25.00