7404

• UCREFRP Catalog Number: 7404
• Author: Masslich, W. J. and A. Wasowicz.
• Title: Interim Report - 1990 Overwinter Survival of Age-0 Colorado Squawfish in the Green and Colorado Rivers.
• USFW Year: 1990.
• USFW - Doc Type: Logan, Utah.
• Copyright Material: NO

Table 1. Range in temperatures and flows of the Green and Colorado Rivers during the YOY
Colorado squawflsh monitoring programs, 1987-1990.
Sample Main Channel Backwater Flows
Period Temperature('c) Temperature('c) (cfs)
Upper Green River
Spring 1990
(A.pril 2-4) 10-15 10-22 2482-3000
Lower Green River
Fall 1987
(Sept. 23-25) 20-22 ------- 2500-2600
Spring 1988
(March 21-25) 6-10 6-15 3245-4638
Fall 1988
(Sept. 26-30) 17-18 8.9 - 24.4 1830-1940
Spring 1989
(March 20-24) 5.5-7 7-17 4000.4500
Fall 1989
(Sept. 25-29) 17-20 15-23 1250-1750
Spring 1990
(March 20-25) 10.14 8-20 2600-2800
Fall 1990
(Sept. 17-20) 18.5-23.5 17-28.5 1200-1400
Colorado River _
Fall 1989
(Sept. 23-25) 18-22 -------- 3600-4000
Spring 1988
(March 21-25) 6-11 5-17 3884-4424
Fall 1988
(Sept. 26-30) 15-17.5 12.2 - 25 3220-3640
Spring 1989
(March 20.24) 10-12 12-18 4000-4300
Fall 1989
(Sept. 25-29) 18-21 16-25 2600-3150
Spring 1990
(March 20-25) 12-17 13-26 2000-2300