8087

• UCREFRP Catalog Number: 8087
• Author: Valdez, R. A. and B. R. Cowdell.
• Title: Lake Powell Inflow Study. Annual Summary Report - 1994.
• USFW Year: 1994.
• USFW - Doc Type: 453-1,
• Copyright Material: NO

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5.2.2 Seines

The seining information presented in Table 5 represents pooled CPE's for backwaters, shorelines and
slackwater habitats combined for pre and post-runoff sampling. Highest catch rates were fOf red shiner (174.21
pre-runoff and 359.08 fish/l00 m2 post-runoff), sand shinef (215.65 and 275.55) and fathead minnow (51.42
and 251.75).

Table 5. Pooled catch per effort (CPE) for seining during pre and post-runoff sampling, Lake Powell inflow,
1994.

PRE-RUNOFF POST-RUNOFF
Species Total CPE (No./lOD m2) Total CPE (No./lOO m~
RS 3073 174.21 9839 359.08
SS 3804 215.65 7550 275.55
FH 907 51.42 6898 251.75
CC 24 1.36 368 13.43
1'5 326 11.90
CS 76 4.31 4 0.15
CP 9 0.51 61 2.23
SB 25 0.91
BH 10 0.57 2 0.07
SD 4 0.23 4 0.15
GS 3 0.17 5 0.18
FM 2 0.11 1 0.04
CH 1 0.06
BC 1 0.06
SM 1 0.04
5.2.3 Larval Ul!ht Traps

Summaries of fish captured in IarvalUght traps during pre and post-runoff sampling are presented in Table
6. Due to the large number of fish processed in the field. both red shiners and sand shiners were combined.

Table 6. Summary or fish captured in larval Ugbt traps during pre and post-nmoa sampling, Lake Powell
lnflow, 1994.

PRE-RUNOFF POST-RUNOFF
Species Total CPE (No./l00 hrs) Total CPE (No./lOO hIs)
SH 760 257.0 11386 2945.9
FH 6 1.5
1'5 5 1.3

S.3 STOMACH CONTENT ANALYSIS

Stomach contents of 24 predatory fish species were analyzed. This sample included 13 striped bass. 8 walleye
2 smallmouth bass and 1 black crappie. FISh remains were found in stomachs of 9 striped bass, 3 walleye and
one black crappie. FISh remains in the walleye and black crappie stomachs were partially digested and have
not been identilied. All identifiable fish remains in the striped bass stomachs have been dassilied as red or