8216

• UCREFRP Catalog Number: 8216
• Author: Crowl, T. A. and L. Lentsch.
• Title: Estimating Northern Pike Predation on Colorado Squawfish in the Middle Green River
• USFW Year: 1996.
• USFW - Doc Type: A Bioenergetics Approach.
• Copyright Material: NO

~.
1
1
1
1
t
1
1
1
1
1
1
1
1
1
1
1
.-.
.~ 400
Z
W 350
Q
W
= 300
~ 250
Q
~ 200
~ 150
Q 100
~_ 50
m
0
•--~•• FIELD DATA
-A~ 1
$ 2%
--~- 3
~- 5
-~-- 10
-~-- 25

MAY-JUG AUG-dCT NOV-JAN FEB APR
SEASON
Figure 4. Predicted biomass of Colorado squawfish that would be consumed each season by
1,000 northern pike with the same population size structure as was observed in samples from the
Ouray reach for the Green River. Each line indicates predicted consumption of squawfish for
different percentages of the wet diet biomass of pike. Predictions based on the observed diet are
indicated by either dashed line or solid circle.
15