8006

• UCREFRP Catalog Number: 8006
• Author: Hawkins, J. A., E. J. Wick and D. E. Jennings.
• Title: Icthyofauna of the Little Snake River, Colorado, 1994 - Final Report.
• USFW Year: 1997.
• USFW - Doc Type: Denver, CO.
• Copyright Material: NO

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METHODS

Discharge and water temperature

Mean daily discharge for water year 1 994 included records from October 1,
1993 to September 30, 1994. Records were from the USGS, "Little Snake River
near Lily, Colorado" gage #09260000 located at RK 15 at an elevation of 1733 m
(Ugland et al. 1995).

Water temperature was recorded hourly from May 16 until October 24,
1994 on the Yampa and Little Snake rivers by Ryan, Temp-Mentor@ thermographs.
One thermograph was placed in the Yampa River at Moffat County Road-25 bridge,
approximately 1.5 km above the confluence with the Little Snake River and
another was placed on the Little Snake River at RK 15 near the USGS gaging
station. Thermographs were checked bi-weekly to insure they remained
submerged as water levels dropped.

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Conductivity and pH were measured on each fish sampling trip.
Measurements for pH were taken using a Cole Parmer@, model pHTestr 2 and
conductivity was measured with a Cole Parmer@, model TDSTestr 3
(range 1-1990 pS).

Fish collections

In 1994, we sampled for fish at each of the three sites on the Little Snake
River during runoff and baseflow. We sampled at runoff because endangered
fishes were previously collected during this time by Wick et al. (1991) and we
sampled at baseflow to identify what species remain during low flows. Larval fish
were collected to identify which species reproduced within the Little Snake River.
Fish were collected during runoff on May 13-16 and June 7-11 and during

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