7989

• UCREFRP Catalog Number: 7989
• Author: Crowl, T. A. and N. W. Bouwes.
• Title: Modeling Population Dynamics of Colorado Squawfish, Razorback Sucker, and Humpback Chub
• USFW Year: 1997.
• USFW - Doc Type: for Management Objective Development.
• Copyright Material: NO

Colorado River subpopulation falling below 500 individuals. The Lower Green River
subpopulation showed a 50% chance of falling below 250 adults with those increases
in interannual survivorship variation.
Table 5. The number of runs out of 100 runs that fell below 125 individuals (25
females) for the Colorado, Lower Green, and Upper Green, respectively.
Age Survivorshi
S std Decrease S
10% no.<125 Decrease S 5%
no.<725 _ Increase std 10%
no.<725 Increase std
20% no.<1
eggs 0.01 0.001 36 8 4 5 0 0 0 0 0 2 0 0
0 0.15 0.05 38 10 0 6 0 0 0 0 0 2 0 0
1 0.30 0.05 30 8 4 800 000 0 0 0
2 0.40 0,05 36 8 4 10 0 0 0 0 0 0 0 0
3 0.60 0.05 38 6 4 12 0 0 0 0 0 0 0 0
Adult 0.80 0.04 100100100 92 80 72 0 0 0 0 0 0
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