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�North and South Twin Lakes Fishery Update�

August 24, 2024

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WISCONSIN DEPARTMENT OF NATURAL RESOURCES | DNR.WI.GOV

  • Fall Juvenile Walleye Recruitment Surveys
    • GLFWIC or DNR
    • Sept-Oct
    • Electrofishing entire shoreline
    • Collecting YOY and age-1+

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WISCONSIN DEPARTMENT OF NATURAL RESOURCES | DNR.WI.GOV

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WISCONSIN DEPARTMENT OF NATURAL RESOURCES | DNR.WI.GOV

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WISCONSIN DEPARTMENT OF NATURAL RESOURCES | DNR.WI.GOV

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WISCONSIN DEPARTMENT OF NATURAL RESOURCES | DNR.WI.GOV

Adult Walleye Population Estimate Surveys

  • What is an adult walleye?
        • Able to determine if male or female
        • Unknown sex but ≥ 15”
  • Mark and recapture method for estimates
        • Capture and mark a small portion of population
        • Capture and record marks
        • DNR 10-year rotation
        • GLIFWC more random

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WISCONSIN DEPARTMENT OF NATURAL RESOURCES | DNR.WI.GOV

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WISCONSIN DEPARTMENT OF NATURAL RESOURCES | DNR.WI.GOV

Year

Estimated Number of Adults

Estimated Adults per Acre

Adults < 15” per Acre

Adults ≥ 15” per Acre

Adults ≥ 20” per Acre

Survey Agency

1991

6,341

1.8

1.2

0.6

0.10

WDNR

1996

14,141

4.1

2.2

1.9

0.37

WDNR

1998

5,007

1.5

0.8

0.7

0.05

GLIFWC

2002

5,827

1.7

1.5

0.2

0.10

GLIFWC

2007

9,986

2.9

2.7

0.3

0.04

WDNR

2013

13,441

3.9

2.5

1.4

0.01

GLIFWC

2017

12,814

3.7

2.3

1.5

0.07

WDNR

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WISCONSIN DEPARTMENT OF NATURAL RESOURCES | DNR.WI.GOV

What’s Next

  • Continue annual fall EF surveys
  • Comprehensive survey in 2028
      • Walleye PE
      • Muskie PE?
      • Creel survey

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Eric Wegleitner�Vilas County Fish Biologist

eric.wegleitner@wisconsin.gov

715-356-5211 ext. 246