9372

• UCREFRP Catalog Number: 9372
• Author: San Juan River Basin Recovery Implementation Program.
• Title: Annual Budget and Work Plan.
• USFW Year: 1999.
• USFW - Doc Type: \
• Copyright Material: NO

pikeminnow were radio-tagged. In addition, 10 adult and 43 juvenile, experimentally-stocked
Colorado pikeminnow have been recaptured. Twenty-two roundtail chub were collected, 18 of
these were PIT -tagged. No wild razorback sucker were collected, however 62 of 68 recaptured,
stocked razorback sucker have been recaptured during adult monitoring. FLOY -tagged native
suckers have yielded data about the movement of these species in relation to four instream
diversion structures in the area of Farmington, New Mexico.

The need for a long-term, standardized monitoring program, such as the adult monitoring study
is addressed in objective 5.7.1, a Milestone in the San Juan River Long Range Plan.
Additionally, future monitoring will help determine fish community response to reoperation
flows from Navajo Dam (objective 5.2.10), as well as monitoring both wild and augmented
populations of Colorado pikeminnow and razorback sucker (objective 5.3.9). Further
monitoring of experimentally-stocked, adult Colorado pikeminnow and FLOY -tagged native
suckers will help address objective 5.2.9, specifically 5.2.9.1 by examinig the movements of
these fish in relation to the diversion structures near Farmington, New Mexico.

Adult monitoring will continue with one trip in fall 1999, to measure fish community response
to reoperation flows from Navajo Dam, monitor populations of experimentally-stocked Colorado
pikeminnow and razorback sucker, and assess impacts of instream diversion structures to native
fish species. In support of objective #5 below, nonnative fish removal will continue to be done
on all adult monitoring trips. In support of objective #4 data collected from recaptured, FLOY-
tagged fish collected in the Farmington to Hogback Diversion (New Mexico) reach will continue
to be examined to evaluate the impact of instream diversion structures in this reach of river on
the movement of native fish species. The study design for adult monitoring is based upon the
latest draft criteria for long-term monitoring of the San Juan River main channel fish
community. These criteria are currently being finalized by the San Juan River Biology
Committee.

Obiectives:

1.) Determine shifts in fish community structure, abundance and distribution, and
length/weight frequencies under the reoperation flow regime.

2.) Monitor Colorado pikeminnow population trends (spawning and staging areas,
habitat needs).

3.) Monitor experimentally stocked razorback sucker and Colorado pikeminnow
(growth rates, dispersal patterns and habitat use).

4.) Continue evaluation of movement data and rare fish distribution to determine the
extent to which current structures (dams, weirs, etc.) may impeding endangered
fish movement.

Work Plan FY99.wpd

2

Budget and Work Plan FY99

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