8144

• UCREFRP Catalog Number: 8144
• Author: Valdez, R. A.
• Title: Evaluation of Habitat Utilization Curves for Endangered Colorado River Fishes.
• USFW Year: 1985.
• USFW - Doc Type: \
• Copyright Material: NO

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deep. Gosse bel ieves that measures of average water column velocity do not
accurately represent the water velocity actually used and preferred by the
fish. The SCUBA method 'tJorks well in clear water such as below the dam
spillways of Flaming Gorge, Glen Canyon, and Navajo, but it is unusable in
turbid waters inhabited_by the ~nditngered Colorado River fishes.

The problem remains of how to assure thClt the habitat pare-meters being
neasurcd and C'ssociateo with fishes of. all Clges in a larg€: turbid riverine
system represpnt preferred Mb.;:tat. The FWS's habitat modeling efforts
represent one step toward solving thnt problem.