7785

• UCREFRP Catalog Number: 7785
• Author: Thompson, J. M.
• Title: The Role of Size, Condition, and Lipid Content in the Overwinter Survival of Age-0 Colorado Squawfish.
• USFW Year: 1989.
• USFW - Doc Type: Colorado State University,
• Copyright Material: NO

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6

Table 2. Mean total lengths of age-O Colorado squawfish in
strata A and B (river kilometers 35-211) and E and
F (river kilometers 340-516) or in reaches 3
(river kilometers 0-194) and 4 (river kilometers
323-515) of the Green River 1979-1988. River
kilometers measured upstream from the confluence
of the Green and Colorado Rivers (river kilometer
0). Age-O fish were considered to be those ~ 65
mm total length at time of capturea.

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Year Date strata/Reach n Mean Total Length
(mm)
1979 09/18- A and B 707 44.3
10/12 E and F 502 44.2
1980 09/09- A and B 1053 36.4
10/08 E and F 420 43.0
1981 09/15- A and B 109 44.9
09/17 E and F 264 45.7
1982 09/21- A and B 146 32.7
10/05 E and F 439 35.8
1983 10/15- A and B 29 28.8
11/10 E and F 3 34.7
1984 10/09- A and B 2 43.0
10/18 E and F 22 29.6
1985 10/01- A and B 193 43.6
10/28 E and F 60 35.3
1986 09/29- 3 841 28.6
10/03 4 489 28.6
1987 09/21- 3 853 36.1
10/02 4 213 43.2
1988 09/24- 3 2911 38.4
10/04 4 905 42.6
ddata for 1979-1985 taken from Tyus et ale (1987); data for
1986-1988 collected by USFWS (Colorado River Fishery
Project), Grand Junction, co.