7019

• UCREFRP Catalog Number: 7019
• Author: Hawkins, J. A.
• Title: Age and Growth Of Colorado Squawfish From the Upper Colorado River Basin, 1978-1990.
• USFW Year: 1991.
• USFW - Doc Type: Fort Collins, CO.
• Copyright Material: NO

List of Figures

Figure

Page

Orientation of scale tracing along several axes and
location of annuli measurements (line A-B) . . . . . . . . . . . . . . . . . . . . . .". . . . . . . . . . . 6

2 Length frequency of COloradosquawfish tagged in the
Upper Colorado River Basin, 1978-1989 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 10

3 Yearly length frequency of Colorado squawfish from
the Colorado River, 1979-1983 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1 I

4 Yearly length frequency of Colorado squawfish from
the Colorado River, 1984-1988 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 12

5 Yearly length frequency of Colorado squawfish from
the Green River, 1979-1983 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 13

6 Yearly length frequency of Colorado squawfish from
the Green River, 1984-1988 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 14

7 Yearly length frequency of Colorado squawfish from
the White River, 1981-1985 ........................................... 15

8 Yearly length frequency of Colorado squawfish from
the Yampa River, 1979-1983 .......................................... 16

9 Yearly length frequency of Colorado squawfish from
the Yampa River, 1984-1988 .......................................... 17

10 Estimated weights of Colorado squawfish from
pooled weight-length relationships ...................................... 21

I I Seasonal variation of mean relative condition (Kn) of mature (>428 mm TL)
Colorado squawfish from the Upper Colorado River Basin, 1978-1989 . . . . . . . . . . .. 22

12 Fish length to scale radius relationship for 336 Colorado squawfish
from the Upper Colorado River Basin, 1978-1990 . . . . . . . . . . . . . . . . . . . . . . . . . .. 24

13 Age composition of Colorado squawfish from the Upper Colorado River

Basin, 1978-1990 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 26

14 Average back-calculated lengths of Colorado squawfish
from the Upper Colorado River Basin, 1978-1990 . . . . . . . . . . . . . . . . . . . . . . . . . .. 32

15 Comparison of average back-calculated lengths of Colorado squawfish
from this and previous studies in the Upper Colorado River Basin ...... . . . . . . . .. 34

16 Average annual increment increase of Colorado squawfish from
the Upper Colorado River Basin, 1978-1990 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 35

17 Relative growth of Colorado squawfish from the Upper
Colorado River Basin, 1978-1990, based on back-calculated lengths
and mark-recapture data ............................................. 37

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