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Sea Lamprey Control in the Great Lakes 2020

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Sea Lamprey Control in the Great Lakes 2020 SEA LAMPREY CONTROL IN THE GREAT LAKES 2020 ANNUAL REPORT TO THE GREAT LAKES FISHERY COMMISSION Jessica Barber U.S. Fish and Wildlife Service Marquette, Michigan United States Mike Steeves Fisheries and Oceans Canada Sault Ste. Marie, Ontario Canada Cover: Joe Hodgson (Department) checking the status of a trap on the Koshkawong River, a tributary of Lake Huron. Photo taken by Bruce Morrison (Department). Report compiled by: Sam Hultberg, U.S.Fish and Wildlife Service, Marquette Biological Station TABLE OF CONTENTS INTRODUCTION ....................................................................................................................................... 8 FISH COMMUNITY OBJECTIVES ........................................................................................................ 8 Lake Superior ................................................................................................................................. 9 Lake Michigan ................................................................................................................................ 9 Lake Huron .................................................................................................................................... 9 Lake Erie ...................................................................................................................................... 10 LAMPRICIDE CONTROL ..................................................................................................................... 11 Lake Superior ............................................................................................................................... 15 Lake Michigan .............................................................................................................................. 17 Lake Huron .................................................................................................................................. 19 Lake Erie ...................................................................................................................................... 21 Lake Ontario ................................................................................................................................ 21 ALTERNATIVE CONTROL .................................................................................................................. 21 Barriers................................................................................................................................................ 21 Lake Superior ............................................................................................................................... 24 Lake Michigan .............................................................................................................................. 25 Lake Huron .................................................................................................................................. 28 Lake Erie ...................................................................................................................................... 30 Lake Ontario ................................................................................................................................ 31 Juvenile Trapping ............................................................................................................................... 32 Supplemental Control ........................................................................................................................ 32 Sterile Male Release Technique ........................................................................................................ 35 ASSESSMENT .......................................................................................................................................... 35 Larval Assessment .............................................................................................................................. 36 Lake Superior ............................................................................................................................... 36 Lake Michigan .............................................................................................................................. 43 Lake Huron .................................................................................................................................. 49 Lake Erie ...................................................................................................................................... 55 Lake Ontario ................................................................................................................................ 56 Juvenile Assessment ........................................................................................................................... 59 Lake Superior ............................................................................................................................... 59 Lake Michigan .............................................................................................................................. 60 Lake Huron .................................................................................................................................. 61 Lake Erie ...................................................................................................................................... 63 Lake Ontario ................................................................................................................................ 64 Adult Assessment ................................................................................................................................ 64 Lake Superior ............................................................................................................................... 64 Lake Michigan .............................................................................................................................. 67 Lake Huron .................................................................................................................................. 69 Lake Erie ...................................................................................................................................... 71 Lake Ontario ................................................................................................................................ 72 RISK MANAGEMENT ............................................................................................................................ 76 TASK FORCE REPORTS ....................................................................................................................... 79 Lampricide Control Task Force ........................................................................................................ 79 Barrier Task Force ............................................................................................................................. 82 Larval Assessment Task Force .......................................................................................................... 84 Trapping Task Force .......................................................................................................................... 87 COMMUNICATIONS AND OUTREACH ............................................................................................ 91 PERMANENT EMPLOYEES OF THE SEA LAMPREY CONTROL PROGRAM ........................ 92 LIST OF TABLES Table 1. Summary of lampricide applications in tributaries of the Great Lakes in 2020. .............12 Table 2. Details on the application of lampricides to tributaries and lentic areas of Lake Superior during 2020 (letter in parentheses corresponds to location of stream in Figure 2). .......................16 Table 3. Details on the application of lampricides to tributaries and lentic areas of Lake Michigan during 2020 (letter in parentheses corresponds to location of stream in Figure 2). .......................18 Table 4. Details on the application of lampricides to tributaries and lentic areas of Lake Huron during 2020 (letter in parentheses corresponds to location of stream in Figure 2). .......................20 Table 5. Status of concurrence requests for barrier removals, replacements, or fish passage projects in Lake Superior tributaries during 2020. ........................................................................25 Table 6. Status of concurrence requests for barrier removals, replacements, or fish passage projects in Lake Michigan tributaries during 2020. .......................................................................26 Table 7. Status of concurrence requests for barrier removals, replacements, or fish passage projects in Lake Huron tributaries during 2020. ............................................................................29 Table 8. Status of concurrence requests for barrier removals, replacements, or fish passage projects in Lake Erie tributaries during 2020. ...............................................................................31 Table 9. Status of concurrence requests for barrier removals, replacements, or fish passage projects in Lake Ontario tributaries during 2020. ..........................................................................32 Table 10. Sea lamprey captures from juvenile trapping in 2020. Catch per unit effort (CPUE) was calculated using lamprey captured per net night. ...................................................................32
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