IDAH DEPARTMENT OF FISH AND GAME FISHERY MANAGEMENT REPORT ...¢  IDAH DEPARTMENT OF FISH...

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Transcript of IDAH DEPARTMENT OF FISH AND GAME FISHERY MANAGEMENT REPORT ...¢  IDAH DEPARTMENT OF FISH...

  • IDAH DEPARTMENT OF FISH AND GAME

    FISHERY MANAGEMENT REPORT

    Steven M. Huffaker, Director

    2004 UPPER SNAKE REGION

    By

    Dan Garren, Regional Fishery Biologist William C. Schrader, Senior Fishery Research Biologist

    Damon Keen, Assistant Fish Hatchery Manager Jim Fredericks, Regional Fishery Manager

    April 2006 IDFG 05-15

  • ii

    TABLE OF CONTENTS

    Page

    MOUNTAIN LAKES INVESTIGATIONS

    ABSTRACT ....................................................................................................... 1

    INTRODUCTION ....................................................................................................... 2

    OBJECTIVE ....................................................................................................... 2

    METHODS ....................................................................................................... 2

    RESULTS ....................................................................................................... 3

    DISCUSSION ....................................................................................................... 3

    RECOMMENDATIONS..................................................................................................... 4

    LIST OF TABLES

    Table 1. Results from lake surveys in the Upper Snake Region, Idaho, 2004 .......... 5

    APPENDIX

    Appendix A. Mountain lake report summaries................................................................ 6

    RIVERS AND STREAMS INVESTIGATIONS

    ABSTRACT ....................................................................................................... 17

    METHODS ....................................................................................................... 18

    RESULTS ....................................................................................................... 18 Mack’s Inn ....................................................................................................... 18 Ora to Vernon ....................................................................................................... 18 Stone Bridge ....................................................................................................... 19 St. Anthony ....................................................................................................... 19

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    TABLE OF CONTENTS (Continued)

    Page

    DISCUSSION ....................................................................................................... 19

    RECOMMENDATIONS..................................................................................................... 21

    LITERATURE CITED ....................................................................................................... 22

    LIST OF FIGURES

    Figure 1. Length frequency distribution of Yellowstone cutthroat trout and rainbow trout collected electrofishing in the Mack’s Inn section of the Henrys Fork Snake River, Idaho, 2004........................................................................... 23

    Figure 2. Population estimates for the Mack’s Inn section of the Henrys Fork Snake River, Idaho. 2004 estimates include Yellowstone cutthroat trout as well as rainbow trout ..................................................................... 25

    Figure 3. Length frequency distribution for brown trout and rainbow trout collected electrofishing in the Ora section of the Henrys Fork Snake River, Idaho, 2004................................................................................................ 25

    Figure 4.` Length frequency distribution for mountain whitefish collected in the Stone Bridge section of the Henrys Fork Snake River, Idaho 2004............ 26

    Figure 5. Catch curve for mountain whitefish collected in the Stone Bridge section of the Henrys Fork Snake River, Idaho 2004 ................................. 27

    Figure 6. Length frequency distribution for rainbow trout and brown trout collected electrofishing in the St Anthony section of the Henrys Fork Snake River,\ Idaho 2004................................................................................................. 27

    LIST OF TABLES

    Table 1. Trout population index summaries for the Henrys Fork Snake River, Idaho, 2004................................................................................................ 23

    Table 2. Data used in population estimates from the Henrys Fork Snake River, Idaho during 2004 and flow levels during sampling .................................... 24

    Table 3. Mean length at age of mountain whitefish collected electrofishing in the Stone Bridge section of the Henrys Fork Snake River, Idaho 2004 based on otoliths .................................................................................................. 26

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    TABLE OF CONTENTS

    Page

    Table 4. Mortality and survival estimates for mountain whitefish captured electrofishing in the Stone Bridge section of the Henrys Fork Snake River, Idaho 2004. Estimates are based on catch-curve analysis ........................ 26

    FALL RIVER ABSTRACT ................................................................................................. 28

    METHODS ....................................................................................................... 29

    RESULTS ....................................................................................................... 29

    DISCUSSION ....................................................................................................... 29

    RECOMMENDATIONS..................................................................................................... 30

    LITERATURE CITED ....................................................................................................... 31

    LIST OF TABLES

    Table 1. Total catch and population estimates for fish collected electrofishing in Fall River, Idaho 2004. Population estimates and resulting densities were derived with a Modified Petersen Estimator (MR-5, MDFWP 1994) ........... 32

    LIST OF TABLES

    Figure 1. Length frequency distribution for rainbow trout collected electrofishing in the Fall River, Idaho 2004 ...................................................................... 32

    Figure 2. Length frequency distribution for mountain whitefish collected electrofishing in the Fall River, Idaho 2004 ................................................ 33

    CONANT CREEK ABSTRACT.......................................................................................... 34

    METHODS ....................................................................................................... 35

    RESULTS ....................................................................................................... 35

    LITERATURE CITED ....................................................................................................... 36

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    TABLE OF CONTENTS (Continued)

    Page

    LIST OF TABLES

    Table 1. Total catch and population estimates for fish collected electrofishing in Conant Creek, Idaho 2004 ..................................................................... 37

    SOUTH FORK SNAKE RIVER ABSTRACT...................................................................... 38

    INTRODUCTION ....................................................................................................... 39

    OBJECTIVES ....................................................................................................... 39

    METHODS AND STUDY AREA........................................................................................ 40 Electrofishing ....................................................................................................... 40 Pine Creek Weir .................................................................................................... 40 Rainbow Trout Redd Radio Telemetry ................................................................... 41 Fish Screens ....................................................................................................... 42

    RESULTS ....................................................................................................... 42 Electrofishing ....................................................................................................... 42 Pine Creek Weir .................................................................................................... 42 Rainbow Trout Redd Radio Telemetry ................................................................... 43

    DISCUSSION ....................................................................................................... 44

    RECOMMENDATIONS..................................................................................................... 45

    ACKNOWLEDGEMENTS ................................................................................................. 46

    LITERATURE CITED ....................................................................................................... 47

    LIST OF FIGURES

    Figure 1. Map of South Fork Snake River, Idaho, showing standard electrofishing sections and the four major spawning tributaries ....................................... 49

    Figure 2. Photos of the Pine Creek fish weir with old floating panels (top photo, June 15, 2002) and new “hard” picket panels (bottom photo, April 2, 2004), South Fork Snake River, Idaho ....................................................