7614

• UCREFRP Catalog Number: 7614
• Author: Valdez, R. A.
• Title: Cataract Canyon Trip Report No. 2 -- Assess Reproductive Activity of Humpback Chub -- ‎(April 11-16, 1988)‎.
• USFW Year: 1988.
• USFW - Doc Type: Logan, Utah.
• Copyright Material: NO

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Table 5. Measurements and cmmts taken from chubs (Gila sp.) captured during
. Trip No. 2 of the 1988 Fisheries Biology and Rafting Project.
SUSPECTED J'ilERISTICSa
SPECIES TL FL SL wr p-p NO CPO CPL HI, DFBL AFBL DR AR
. G. ~ 270 230 208 155 2.95 11.5 47.8 48.1 9 10
G. sp. 72 9 9

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aTL = total length; FL = forked length; SL = standard length; WT = weight
P-P = pectoral to pelvic base; NO = nuchal depth; CPO = caudal peduncle depth
CPL = caudal peduncle length; HL = head length; OFBL = dorsal fin base length
AFBL = anal fin base length; OR = dorsal rays; AR = anal rays

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RIVER FI..(JrJS

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Flows of the river are provided for each trip to provide a perspective of
conditions encountered during sampling (Table 6). The figures are provided by
the Colorado Basin River Forecast Center of the National Weather Service (NOAA)
in Salt Lake city, utah. Flows for the Colorado River above the confluence are
estimated from the stream gauge located at Cisco (RM 95.2). Flows for the
Green River above the confluence are estimated from the stream gauge located at
Green River (RM 119.9). Flows in Cataract Canyon are estimated from the
combination of these two stream gauges since there are no significant inflows
between these gauges and Lake Powell. All flows are recorded at 5:00 am.

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Table 6. A smrmary of average daily flows of the Colorado River in Cataract
Canyon during the field trips of the 1988 Fisheries Biology and
Rafting Project.

TRIP DATES ESTIMATED RIVER FI...a>l (CFS)
Cisco Green River Cataract
1 March 21 3,884 3,245 7,322
22 3,981 3,578 7,727
23 4,078 3,925 7,727
24 4,227 4,517 8,495
25 4,424 4,638 8,926
6

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