7780

• UCREFRP Catalog Number: 7780
• Author: Brooks, J. E., et al.
• Title: San Juan River Seven Year Research Program Summary Report 1992.
• USFW Year: 1992.
• USFW - Doc Type: \
• Copyright Material: NO

Table 1. (Continued)
Family/Species Common Name Code
Percidae
Stizostedion vitreum walleye WE
Poeciliidae
Gambusia affinis mosquito fish GA
Salmonidae
Onchorynchus clazki cutthroat trout CT
O. gairdneri rainbow trout RB
O. clazki x O. gairdneri rainbow x cutthroat RC
O. kisutch coho salmon CO
O. nerka cokaaee salmon KS
Prosopium williamsoni mountain whitefish MF
Salmo trutta brown trout BN
Salvelinus fontinalis brook trout BK
unidentified iTI
no fish collected NF
This report provides summary information on studies conducted in
1991 and 1992. Studies summarized in this report are ongoing and
findings are preliminary and subject to change. Detailed annual
reports for individual studies are compiled separately in San Juan
River, Seven Year Research Program. Technical Investigations, 1992.
Final reports will be issued by the principal investigator as
studies are completed.
SDMMARY REPORTS FOR 1991 AND 1992 RESEARCH ACTIVITIES - Presented
below are individual summary accounts for each research segment
that has been initiated and is ongoing.
Adult Monitoring and ,Radio Telemetry - The San Juan River is
historic habitat for seven native fish species including three rare
fish species: the Colorado squawfish, razorback sucker, and
roundtail chub. In 1991 and 1992, electrofishing surveys were
conducted on the lower mainstem San Juan River. The primary
purpose of these surveys was to monitor the adult fish community in
the river's main channel habitat.
The river was electrofished from river mile (RM) 158.6 (Hogback
Diversion, New Mexico) to Mexican Hat, Utah (RM 53.0) in 1991,
during three sampling trips. Three trips in 1992 sampled from
Farmington, New Mexico (RM .179.0) to Mexican Hat, Utah (RM 53.0).
The most abundant species collected in 1991 was flannelmouth
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