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

LIST OF FIGURES

Page
Figure 1. Proportional composition of wet prey biomass observed in the
springtime diets of each age class of northern pike in the Ouray reach ................... 11
Figure 2. Spring time diet composition of northern pike from the Ouray
reach (top) and the Yampa River (bottom). All age classes of predators
were pooled
together ..................................... .................................................... 12
Figure 3. The mean numerical contribution of prey fishes consumed by pike
each season in the Yampa River. The cyprinid category does not include
Colorado squawfish. Numbers above the bars indicate sample sizes ................... 14
' 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 redicted consum tion of Colorado s uawfish for different
P P q
' percentages of the wet diet biomass of northern pike. Predictions based on the
observed diet are indicated by either dashed line or solid circle ..........................
15
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