SNAKE RIVER SOCKEYE SALMON CAPTIVE BROODSTOCK PROGRAM RESEARCH ELEMENT ANNUAL PROGRESS REPORT January 1, 2004—December 31, 2004 Prepared by: Catherine Willard, Senior Fisheries Research Biologist Mike Peterson, Fisheries Research Biologist Kurtis Plaster, Senior Fisheries Technician Jason Castillo, Fisheries Technician Dan Baker, Hatchery Manager II Jeff Heindel, Assistant Hatchery Manager Jeremy Redding, Fish Culturist and Paul Kline, Principal Fisheries Research Biologist IDFG Report Number 06-01 January 2006 SNAKE RIVER SOCKEYE SALMON CAPTIVE BROODSTOCK PROGRAM RESEARCH ELEMENT 2004 Annual Project Progress Report Part 1—Project Overview Part 2—Oncorhynchus nerka Population Monitoring Part 3—Redfish and Stanley Lakes Sport Fishery Investigations Part 4—Sockeye Salmon Smolt Monitoring and Evaluation Part 5—Sockeye Salmon Spawning Investigations and Unmarked Juvenile Out-migrant Monitoring Part 6—Parental Lineage Investigations Part 7—Proximate Analysis for Juvenile Fish Quality Assessment Part 8—Predator Surveys By Catherine Willard Mike Peterson Kurtis Plaster Jason Castillo Dan Baker Jeff Heindel Jeremy Redding Paul Kline Idaho Department of Fish and Game 600 South Walnut Street P.O. Box 25 Boise, Idaho 83707 To: U.S. Department of Energy Bonneville Power Administration Division of Fish and Wildlife P.O. Box 3621 Portland, OR 97283-3621 Project Number 1991-07-200 Contract Number 5342 IDFG Report Number 06-01 January 2006 TABLE OF CONTENTS Page EXECUTIVE SUMMARY ..............................................................................................................1 PART 1—PROJECT OVERVIEW................................................................................................. 3 BACKGROUND ............................................................................................................................ 3 CAPTIVE PROPAGATION ........................................................................................................... 4 SNAKE RIVER SOCKEYE SALMON CAPTIVE BROODSTOCK PROGRAM............................. 5 PROJECT GOALS........................................................................................................................ 6 PROJECT OBJECTIVES..............................................................................................................6 STUDY AREA ............................................................................................................................... 7 2003 and 2004 Captive Broodstock Program Egg and Juvenile Supplementation................... 7 LITERATURE CITED.................................................................................................................. 12 PART 2—ONCORHYNCHUS NERKA POPULATION MONITORING....................................... 17 INTRODUCTION ........................................................................................................................ 17 METHODS .................................................................................................................................. 17 RESULTS ................................................................................................................................... 18 Redfish Lake ........................................................................................................................... 18 Alturas Lake ............................................................................................................................ 18 Pettit Lake ............................................................................................................................... 18 DISCUSSION.............................................................................................................................. 18 Redfish Lake ........................................................................................................................... 19 Alturas Lake ............................................................................................................................ 19 Pettit Lake ............................................................................................................................... 20 RECOMMENDATIONS............................................................................................................... 20 LITERATURE CITED.................................................................................................................. 27 PART 3—REDFISH AND STANLEY LAKE SPORT FISHERY INVESTIGATIONS................... 28 INTRODUCTION ........................................................................................................................ 28 METHODS .................................................................................................................................. 28 Redfish Lake ........................................................................................................................... 28 Stanley Lake............................................................................................................................ 28 RESULTS ................................................................................................................................... 29 Redfish Lake ........................................................................................................................... 29 Stanley Lake............................................................................................................................ 29 DISCUSSION.............................................................................................................................. 30 Redfish Lake ........................................................................................................................... 30 Stanley Lake............................................................................................................................ 31 RECOMMENDATIONS............................................................................................................... 31 LITERATURE CITED.................................................................................................................. 34 PART 4—SOCKEYE SALMON SMOLT MONITORING AND EVALUATION ............................ 35 INTRODUCTION ........................................................................................................................ 35 METHODS .................................................................................................................................. 35 Redfish Lake Creek Trap ........................................................................................................35 i Table of Contents, continued. Page Alturas Lake Creek Trap .........................................................................................................36 Pettit Lake Creek Trap ............................................................................................................ 36 Salmon River Smolt Group...................................................................................................... 36 Mainstem Snake and Columbia River Dams........................................................................... 37 RESULTS ................................................................................................................................... 37 Redfish Lake Creek Trap ........................................................................................................37 Alturas Lake Creek Trap .........................................................................................................38 Pettit Lake Creek Trap ............................................................................................................ 38 Salmon River Smolt Group...................................................................................................... 38 Mainstem Snake and Columbia River Dams........................................................................... 38 DISCUSSION.............................................................................................................................. 39 Redfish, Alturas, and Pettit Lake Creek Traps ........................................................................ 39 Mainstem Snake and Columbia River Dams........................................................................... 40 RECOMMENDATIONS............................................................................................................... 40 LITERATURE CITED.................................................................................................................. 46 PART 5—SOCKEYE SALMON SPAWNING INVESTIGATIONS AND UNMARKED JUVENILE OUT-MIGRANT MONITORING ........................................................................... 48 INTRODUCTION ........................................................................................................................ 48 METHODS .................................................................................................................................. 48 Sockeye Salmon Spawning Investigations.............................................................................. 48 Unmarked Juvenile Out-migrant Monitoring............................................................................ 49 RESULTS ................................................................................................................................... 49 Sockeye Salmon Spawning Investigations.............................................................................