9546

• UCREFRP Catalog Number: 9546
• Author: Nesler, T. P.
• Title: Interactions Between Endangered Fishes and Introduced Gamefishes in the Yampa River, Colorado, 1987-1991 - Draft Final Report.
• USFW Year: 1995.
• USFW - Doc Type: 91-29,
• Copyright Material: NO

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Fi re Description Page
13. Length frequency distribution of fish prey species found in
stomachs of Yampa River northern pike. 42
14. Relationship between fish prey length and northern pike length
by prey species. 44
15. Colorado squawfish and roundtail chub vulnerability to predation
by northern pike based on comparison of gape and body areas. 47
16. Vulnerability of six Yampa River fish species to predation by
northern pike based on estimated index of largest prey size. 49
17. Bluehead sucker and flannelmouth sucker vulnerability to
predation by northern pike based on comparison of gape and body
areas. 51
18. White sucker and common carp vulnerability to predation by
northern pike based on comparison of gape and body areas. 53
19. Relative vulnerability of potential fish prey species to northern
pike predation based on percentage of predator population with
adequate gape area to ingest prey species individuals with
smallest, median, and largest cross-sectional body areas. 56
20. Upstream and downstream movement of radiotagged and
Floy-tagged northern pike between observations or recaptures. 59
21. Time intervals between northern pike recaptures within river
reaches showing average, maximum and minimum, and intervals
between river reaches for upstream and downstream directions. 65
22. Growth rate in mm and gm for Floy-tagged northern pike
recaptured within a year ( G 300 days). 7
23. Growth rate in mm and gm for Floy-tagged northern pike
recaptured over time intervals of 0.9-5.1 years. 7
24. Length frequency distributions of channel catfish in the Yampa
River by year. 7
25. Length frequency distributions of channel catfish in the Yampa
River by river reach for 1987-1991. 8
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