9319

• UCREFRP Catalog Number: 9319
• Author: Mueller, G., M. Horn, Q. Bradwisch and L. Boobar.
• Title: Examination of Native Recruitment and Description of the Fish Communities Found in the San Jan and Colorado River Interface Zones of Lake Powell, Utah.
• USFW Year: 2001.
• USFW - Doc Type: 01-159,
• Copyright Material: NO

TABLE OF CONTENTS
ABSTRACT iii
ACKNOWLEDGEMENTS vi
INTRODUCTION I
Historical River 3
Fishes and Niches 7
Evolutionary Process I 1
Spawning Observations 12
System Instability and Habitat Alteration 15
Recruitment Failure 27
Research approaches based on squawfish studies 29
RESEARCH QUESTION 33
Research Objectives 33
STUDY AREA 35
Spawning site description 38
METHODS 41
Physical Data Collection 41
Cross Section Surveys 41
Discharge 43
Bed Material Samples 43
Sediment Transport Measurements 44
Channel Monitoring 1996 44
USGS Suspended and Bedload, Jensen Gage 1996 45
Scour Chains 45
Analysis of Historical Flow and Sediment Data 47
HEC-2 and HEC-6 Modeling Methods 48
Contracted Data Collection 50
Fish Monitoring Studies 50
Radiotelemetry 51
ix