8232

• UCREFRP Catalog Number: 8232
• Author: Burdick, B. D.
• Title: Evaluation of Fish Passage at the Grand Valley Irrigation Company Diversion Dam on the Colorado River Near Palisade, Colorado.
• USFW Year: 1999.
• USFW - Doc Type: CAP-17,
• Copyright Material: NO

Table B.l. Summary of the number of fish marked and recaptured downstream of
the Grand Valley Irrigation Company Diversion Dam, April, and July
through August 1998.
Total Number Marked Total Number Reca tured ~ Recapt~
Sampling _ ___ _ in C ip/ ___ _ in Clip/ _-~ ~ Fin
flannelmouth sucker 469 0 11 -- 1.2
bluehead sucker 192 0 1 -- 0.1
roundtail chub 83 0 1 -- 0.1
common carp 0 78 -- 1 0.1
white sucker 0 36 -- 1 0.1
brown trout 0 11 -- 0 0.0
rainbow trout 0 1 -- 0 0.0
flannelmouth sucker X
bluehead sucker 0 1 -- 0 0.0
white sucker X
flannelmouth sucker 0 13 -- 0 0.0
white sucker X
bluehead sucker 0 7 -- 0 0.0
subtotals 744 147 13 2 1.5 0.2
07/1708/20
flannelmouth sucker 148 0 3 -- 1.0
bluehead sucker 193 0 1 -- 0.1
roundtail chub 43 0 0 -- < Ool
common carp 0 35 -- 1 0.1
white sucker 0 21 -- 0 - < 0.1
brown trout 0 3 -- 0 0.0
rainbow trout 0 0 -- 0 0.0
flannelmouth sucker X
bluehead sucker 0 0 -- 0 0.0
white sucker X
flannelmouth sucker 0 1 -- 0 0.0
white sucker X
bluehead sucker 0 10 -- 0 0.0
subtotals 384 70 4 1 0.3 < 0.1
08/2408/28
flannelmouth sucker 0 250 7 6 1.2 0.3
bluehead sucker 0 153 5 2 0.4 0.1
roundtail chub 0 21 2 1 0.1 < 0.1
common carp 0 14 -- 1 0.2
white sucker 0 19 -- 2 0.2
brown trout 0 4 -- 0 0.0
rainbow trout 0 1 -- 0 0.0
flannelmouth sucker X
bluehead sucker 0 0 -- 0 0.0
white sucker X
flannelmouth sucker 0 2 -- 0 0.0
white sucker X
bluehead sucker 0 6 -- 0 0.0
subtotals 0 470 14 12 0.8 0.7
TOTALS 1,128 687 31 15 1.7 0.$
a All fishes marked. Percent recapture is cumulative for each trip.
Total Native Fish Recaptures Downstream: 40 Recapture Rate: 2.2X
Total Nonnative Fish Recaptures Downstream: 6 Recapture Rate: 0.3X
B-1