7608

• UCREFRP Catalog Number: 7608
• Author: Masslich, W. J.
• Title: City of Craig, Colorado, Yampa River Diversion Fish Passage Study
• USFW Year: 1993.
• USFW - Doc Type: Final Report.
• Copyright Material: NO

Table 9. Summary of angler recaptures of fish tagged for the City of Craig, Colorado, Yampa River
Diversion Fish Passage Study conducted by BIO/WEST in 1992.
Capture Recapture Release Recapture Distance Structure
Tag No. Date Date Location Location' -Moved Passage`
BF10095 920426 920622 0.1 -0.9 -1.0 DOWN
BF10086` 920425 920517 0.8 0.2 -0.6 NO
BF10042` 920424 920426 -0.1 -0.2 -0.1 NO
YF00018 920611 -0.2 -0.01 0.2 NO
YF00810 920612 920721 0.6 8.0 7.4 NO
BF10120` 920423 920507 -0.2 -0.2 0 NO
YF00726 920612 920814 0.2 ° - NO
BF10045 920424 920816 -0.7 -6.5 -5.8 NO
'Estimated from angler information.
bUp =movement upstream over structure.
Down =movement downstream over structure.
No =fish did not pass over structure.
`Information not provided by angler.
°Fish captured above structure but exact location not provided
`Radiotagged fish.
Radiotelemetry Study
Radiotagged Fish. A total of 17 fish including nine northern pike, seven flannehnouth suckers
and one roundtail chub were radiotagged during the study (Table 10). Twelve of these fish were
captured, tagged and released in a one mile reach below the diversion structure and five were
captured, tagged and released in a similar reach upstream of the diversion. All fish appeared in good
condition at the time of release and no confirmed mortalities related to implant procedures were
documented during the study.
Three radiotagged northern pike were recaptured and taken by anglers during the study. All
three fish were recaptured within one to 20 days following implant and release. Two of the radiotags
were recovered by BIO/WEST and one was used to implant an additional northern pike.
Movement of Radiotagged Fish. Only four radiotagged northern pike were tracked successfully
for the duration of the study (Table 11). Of these fish, two that were implanted during Trip 2 moved
upstream over the diversion structure during the time period between June 12 (Trip 2) and August
3 (Trip 3) during flows ranging from 268 to 1680 cfs. A third radiotagged pike moved downstream
over the structure the day after it was implanted and then moved upstream over the structure during
the same time period as the two pike described earlier. All three of the pike that ascended the
structure moved distances ranging from approximately 10 to 20 miles upstream where they resided
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