9512

• UCREFRP Catalog Number: 9512
• Author: Anderson, R. and G. Stewart.
• Title: Riverine Fish Flow Investigations Federal Aid Project f-289-R6.
• USFW Year: 2003.
• USFW - Doc Type: Fort Collins.
• Copyright Material: NO

Figure 5. Location of the Big Gypsum (Big Gypsum Valley) study site on the Dolores
River.
METHODS
FISH SAMPLING
Fish sampling was performed by electro-shock on the Yampa and Colorado Rivers
between 1998 and 2001. Fish were electro-shocked and netted from a 15 ft Achilles raft
between 1998 and 2000. A 16-ft Hyside self-bailer raft was equipped for electro-fishing
in 2001 using the same Smith-Root electro-fisher, 5000-watt generator and anode array
mounted on a forward boom as in the three earlier years. Flows below 120 cfs on the
Yampa River were highly problematic for the Achilles boat because it had to be
23