9549

• UCREFRP Catalog Number: 9549
• Author: Bestgen, K. R., K. A. Zelasko, R. I. Compton and T. Chart.
• Title: Response of the Green River Fish Community to Changes in Flow Temperature Regimes from Flaming Gorge Dam since 1996 based on sampling conducted from 2002 to 2004.
• USFW Year: 2006.
• USFW - Doc Type: 115,
• Copyright Material: NO

white sucker, red shiner, flannelmouth sucker, and green sunfish were the most common species
collected, representing 80% of the total assemblage structure and numerically, native fishes were
21 % of those captured.
In LD3 in 1994 to 1996, four native and three introduced species were captured by
seining. Flannelmouth sucker, speckled dace, bluehead sucker, white sucker, and mottled
sculpin were the most common species collected, representing 98.5% of the fish community and
native species represented 94% of fish captured. In LD3 in the 2002 to 2004 period, six native
and 13 introduced species and two hybrids were captured by seining. Red shiner, sand shiner,
fathead minnow, speckled dace, and flannelmouth sucker were the most common species
collected, representing 91% of the total assemblage; native fishes were 11% of those captured,
by number.
In LD4 in 1994 to 1996, five native and eight introduced species and two hybrids were
captured by seining. The fish community in LD4 during the 1994 to 1996 time period shifted
from one dominated mostly by cold-water to cool-water tolerant species upstream to one
dominated by mostly warm-water tolerant species downstream. Red shiner, fathead minnow,
redside shiner, speckled dace, and flannelmouth sucker were the most common species collected,
representing 88% of the total fish community and only 16.8% of all fishes captured were native.
The presence and abundance of red shiner and sand shiner was notable. In LD4 in the 2002 to
2004 period, six native and 15 introduced species and two hybrids were collected by seining.
Red shiner, sand shiner, fathead minnow, white sucker, and flannelmouth sucker were the most
common species collected, representing 96% of the assemblage; numerically, native fishes were
3% of those captured.
In reach 1 of Whirlpool Canyon (WH1) in the 2002 to 2004 period, seven native and 15
introduced species and three hybrids were captured by seining. Red shiner, sand shiner, redside
shiner, fathead minnow, and flannelmouth sucker were the most common species collected,
representing 96% of the assemblage; native fishes were 4% of those captured. In reach WH2 in
the 2002 to 2004 period, four native and 11 introduced species and two hybrids were captured by
seining. Red shiner, sand shiner, fathead minnow, flannelmouth sucker, and white sucker were
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