WSP00625

• File Number: 8240.200.10.B
• Description: UCRBRIP Annual Reports
• Basin: Colorado Mainstem
• Date: 1/12/1995
• Author: UCRBRIP
• Title: 1994 Annual Reports Package Part 1
• Water Supply Pro - Doc Type: Publication

2/3 seine hauls. An additional 6 squawfish were captured in an
opportunistic seine haul in an otherwise unsamp1ed backwater at
RM 264.8.

Eighteen Gila sp, were encountered. Fin ray counts classified all but
one as roundtai1 chubs. These fish measured 40-163 rnm with mean length
of 66.83 mm. Additional native fishes encountered included: 61
bluehead suckers (40-85 rom; mean length 55.42 mm [n=45]), 124
flannelmouth suckers (35-115 mm; mean length 59.52 mm [n=94]), 10
speckled dace (25-54 rom; mean length 39.00 mrn {n=8]) and 10 unknown
suckers (25-42 mm; mean length 34.11 [n=9]), These data are presented
in Table 3 (appended).

The most common species encountered were red shiners and fathead
minnows. Sand shiners, carp, green sunfish, white sucker and black
crappie also were captured.

Bagged samples from 21 primary backwaters are being count~d and
classified. These data will be presented in the required year-end
report.

ISMP POST-JUVENILE/ADULT MONITORING - UPPER GREEN

A total of 122 Colorado squawfish was captured during monitoring
activities in April and May, the greatest number since monitoring
began. An additional 41 were observed, but not netted, Squawfish
ranged in size from 128-741 mm (mean = 474.3 mm) and from 10-4250 g
(mean = 1002.8 g), The catch rate for squawfish was 2.13 fish/hour.
Nine of the fish caught were recaptures of fish originally marked as
far back as 1987. More detailed information is given in the appended
tables (4-6).

In addition to ISMP captures, a squawfish measuring 420 mm and weighing
850 g was caught at RM 295.8 while testing equipment the day before
monitoring began. Anglers reported catching 4 squawfish. One fish was
caught along The Stirrup (RM 276 - RM 270) in early July; I at the
Gates of Lodore (RM 363.4) on 29 July; 1 at the Yampa-Green (RM 344.8)
confluence on 31 July; and I on the Yampa 3-4 miles above Maybell on
29 July,

Five razorback suckers were captured, all in the Jensen reach (3 on
Razorback bar, I at the Escalante Ranch and I at Ashley Creek). These
fish ranged 420-547 mm (mean = 499.2 mrn) long and 725-2000 g (mean =
1400.0 g). The catch rate for razorbacks was 0.36 fish/hour in the
Jensen reach and 0.09 /hour overall. All 3 of the fish caught at
Razorback Bar were recaptures.

A total of 6 roundtail chubs was netted, half in the Jensen reach.
These fish ranged 185-355 mm long (mean = 284.0 mm) and 120-420 g
(265,8 g), The catch rate for these fish was 0,12 fish/hour. One
additional chub was observed, but not landed.

VII. Recommendations: None,

VIII. Project Status: On track and ongoing,

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