6012

• UCREFRP Catalog Number: 6012
• Author: Miller, W. H., D. L. Archer, H. M. Tyus and K. C. Harper.
• Title: Colorado River Fishery Project
• USFW Year: 1982.
• USFW - Doc Type: Final Report.
• Copyright Material: NO

with schools of YOY northern squawfish. Collections in Dinosaur National
Munument indicated that t}~e opposite is true for Colorado squawfish.
YOY Colorado squawfish were not collected where redside shiners were
present; however, there appeared io be a positive association between
YOY Colorado squawfish and red shiners since they were often collected
together.
Field studies of diel movement of fishes show heavy utilization of
backwater areas by YOY and juveniles of many species, both native and
exotic. This behavior was probably related to temperature, water velocity,
and food availability. There was no correlation evident between the
presence or absence of rare or endangered endemic fishes and other
native or exotic species.