7145

• UCREFRP Catalog Number: 7145
• Author: Inslee, T. D.
• Title: Spawning of Razorback Suckers
• USFW Year: 1981.
• Copyright Material: NO

RECOVERY PRMRAM FOR
? THE ENDANGERED FISHES
OF THE UPPER COI0RADO
U.S. Fish and Wildlife Service • P.O. Box 25486 • Denver Federal Center • Denver, Colorado 80225 • [phone]
PROLOGUE
This is the second of two reports that collectively provide recommendations
for year-round flows in the 15-mile reach of the upper Colorado River. The
conclusions and recommendations presented in the report are based on the best
available biological information. A study is currently being conducted that
will help refine these recommendations. This study will relate habitat
quality, quantity, and diversity to incremental river discharge levels. A
third report will be prepared in 1992 that will include the results of the new
study, summarize recommendations made in the two preceding reports, and
include appropriate modifications to the flow recommendations based on the new
information.
Future studies in the upper Colorado River subbasin will no doubt provide
additional information and improve our understanding of the relationships
between flow and the well-being of endangered fish populations. As a result,
there will be a continuing effort to refine the recommendations for flows
needed to recover these species. A more riverwide approach will be needed
which would include the flow needs of humpback and bonytail chub, species that
do not inhabit the Grand Valley and are therefore not considered in these
reports.
The Recovery Program's Implementation Committee has the responsibility for
implementing the flow recommendations contained in this report. Consequently,
the report will be transmitted to the Implementation Committee for their
immediate consideration.
J4-,-4 -
Director, Colorado River Recove y
Implementation Program
U.S. Fish and Wildlife Service • U.S. Bureau of Reclamation • Western Area Power Administration
Colorado • Utah • Wyoming • Environmental Groups • Upper Basin Water Users
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