9526

• UCREFRP Catalog Number: 9526
• Author: LaGory, K. E., J. W. Hayse and D. Tomasko.
• Title: Recommended Priorities for Geomorphology Research in Endangered Fish Habitats of the Upper Colorado River Basin.
• USFW Year: 2003.
• USFW - Doc Type: Argonne, Illinois.
• Copyright Material: NO

Geomorphology Research Priorities
CONTENTS
September 2003
EXECUTIVE SUMMARY ................................................................................................... ix
ACKNOWLEDGMENTS ..................................................................................................... xv
NOTATION ........................................................................................................................... xvii
1 INTRODUCTION ........................................................................................................... 1
2 LIFE HISTORIES OF COLORADO PIKEMINNOW, HUMPBACK CHUB,
AND RAZORBACK SUCKER ...................................................................................... 5
2.1 Colorado Pikeminnow ............................................................................................ 5
2.2 Humpback Chub ..................................................................................................... 7
2.3 Razorback Sucker ................................................................................................... 8
3 METHODS ...................................................................................................................... 11
4 PREVIOUS RESEARCH IN THE UPPER COLORADO RIVER BASIN ................... 23
4.1 Green River and Tributaries .................................................................................... 23
4.2 Upper Colorado River and Tributaries ................................................................... 28
5 RES ULTS OF PRIORITY SCORING FOR REACHES AND HABITATS .................. 35
5.1 Colorado Pikeminnow ............................................................................................ 35
5.2 Humpback Chub ..................................................................................................... 46
5.3 Razorback Sucker ................................................................................................... 50
5.4 All Species .............................................................................................................. 60
6 GEOMORPHOLOGY INFORMATION NEEDS IN PRIORITY
REACHES AND HABITATS ......................................................................................... 63
6.1 Relationships between Habitat Characteristics and Geomorphic Parameters ........ 63
6.2 Information Needed to Address Reach-Habitat Priorities
in the Green River Subbasin ................................................................................... 67
6.2.1 Overall Reach-Habitat Priorities in the Green River Subbasin .................. 67
6.2.2 Species-Specific Reach-Habitat Priorities in the
Green River Subbasin ................................................................................. 73
6.3 Information Needed to Address Reach-Habitat Priorities
in the Upper Colorado River Subbasin ................................................................... 75
6.3.1 Overall Reach-Habitat Priorities in the Upper Colorado
River Subbasin ............................................................................................ 76
6.3.2 Species-Specific Reach-Habitat Priorities in the Upper
Colorado River Subbasin ............................................................................ 81
iii