north and south twin lake chain · 2017. 4. 12. · the twin chain is located in vilas county near...

WISCONSIN DEPARTMENT OF NATURAL RESOURCES CREEL SURVEY REPORT

NORTH AND SOUTH TWIN LAKE CHAIN

VILAS COUNTY

2017-18

Treaty Fisheries Publication

Compiled by Jeff Blonski & Jason Halverson

Treaty Fisheries Technicians

CONTENTS INTRODUCTION ................................................................................................................. 1 GENERAL LAKE INFORMATION .................................................................................... 2 Location ........................................................................................................................... 2 Physical Characteristics ................................................................................................... 2 Seasons Surveyed ............................................................................................................ 2 Weather ............................................................................................................................ 2 Fishing Regulations ......................................................................................................... 2 SPECIES CATCH AND HARVEST INFORMATION ....................................................... 2 CREEL SURVEY RESULTS AND DISCUSSION ............................................................. 3 Survey Logistics .............................................................................................................. 3 General Angler Information ............................................................................................. 3 RESULTS BY SPECIES ....................................................................................................... 3 ACKNOWLEDGMENTS ..................................................................................................... 4

SUMMARY TABLES

Table 1. Sportfishing effort summary .................................................................................... 5 Table 2. Creel survey synopses .............................................................................................. 6

SPECIES CATCH AND HARVEST FIGURES

Gamefish Figure 1. Walleye ............................................................................................................. 7 Figure 2. Northern Pike ................................................................................................... 8 Figure 3. Muskellunge ..................................................................................................... 9 Figure 4. Smallmouth Bass .............................................................................................. 10 Figure 5. Largemouth Bass .............................................................................................. 11 Panfish Figure 6. Yellow Perch .................................................................................................... 12 Figure 7. Bluegill ............................................................................................................. 13 Figure 8. Black Crappie ................................................................................................... 14 Figure 9. Pumpkinseed..................................................................................................... 15 Figure 10. Rock Bass ....................................................................................................... 16 Cover Art: Steve Hilt, Portland, OR Fish Graphics: Virgil Beck, Stevens Point, WI

1

INTRODUCTION Fish populations can fluctuate due to natural forces like weather, predation or competition; management actions like stocking, regulations or habitat improvement; habitat loss and harvest impacts. Wisconsin Department of Natural Resources fisheries crews regularly conduct fishery surveys on lakes and reservoirs to gather the information needed to monitor changes, identify concerns, evaluate past management actions, and to prescribe fishery management strategies. Netting and electrofishing surveys are used to gather data on the status of fish populations and communities, measuring such parameters as species composition, population size, reproductive success, size or age distribution and growth rates. The other key component of the fishery that we often need to measure is harvest. On many lakes in the Ceded Territory of northern Wisconsin, harvest of fish is divided between sport anglers and the six Chippewa tribes who harvest fish under rights granted by federal treaties. The tribes harvest fish mostly using a highly efficient method, spearing, during a relatively short time period in the spring. Every fish in the spear harvest is counted – a complete “census” of the harvest. We also measure the sport angler harvest to assess its impact on the fishery. However, it would be highly impractical and very costly to conduct a complete census of every angler who fishes on a lake. Therefore, we conduct creel surveys. A creel survey is an assessment tool used to sample the fishing activities of anglers on a body of water and make projections, or estimates, of harvest and other fishery parameters. Creel survey clerks work on randomly-selected days and

shifts, forty hours per week. The survey is conducted during the open season for gamefish from the first Saturday in May through the first Sunday in March. Creel surveys are not conducted in November when fishing effort is low and ice conditions are often unsafe. The survey is run during daylight hours, and shift times change from month to month as day length changes. Creel survey clerks travel their lakes using a boat or snowmobile to count the number of anglers at predetermined times, and to interview anglers who have completed their fishing trip. Data is collected on what species they fished for, catch, harvest, lengths of fish harvested, marks (fin clips or tags), and hours of fishing effort. Collecting completed-trip data provides the most accurate assessment of angling activities, and it avoids the need to disturb anglers while they are fishing. A computer program is used to estimate catch and harvest of each species, catch and harvest rates, and fishing effort by month, as well as for the year in total. Keep in mind that these are estimates based on the best information available, and not a complete accounting of effort, catch, and harvest. Accurate estimates require that we sample a sufficient and representative portion of the angling activity on a lake. The accuracy of creel survey results depends on good cooperation and truthful responses by anglers when a creel clerk interviews them. You may have encountered a DNR creel survey clerk on a recent fishing trip. We appreciate your cooperation during an interview. The survey only takes a few minutes of your time, and it gives the Department valuable information needed for management of the fishery.

2

This report provides estimates of: 1. Overall fishing effort (pressure) 2. Fishing effort directed at each species 3. Numbers of fish caught and harvested 4. Catch and harvest rates Also included are a physical description of the Twin Chain; discussion of results of the survey; and detailed summaries by species of fishing effort, catch and harvest. GENERAL LAKE INFORMATION

Location The Twin Chain is located in Vilas County near the town of Phelps. Physical Characteristics The Twin Chain is a 3,430-acre drainage system with a maximum depth of 60 feet. Littoral substrate consists mainly of sand, with rock, gravel, and muck. The Twin Chain contains fertile, slightly alkaline, clear water of moderate transparency. Seasons Surveyed The period referred to in this report as the 2017-18 fishing season ran from May 6, 2017 through March 4, 2018. The open-water creel survey ran from May 6 through October 31, 2017, and the ice fishing creel survey ran from December 1, 2017 through March 4, 2018.

Weather Ice-out on the Twin Chain was around April 12, 2017. Fishable ice formed on the Twin Chain in mid-December. Fishing Regulations The following seasons, daily bag limits, and length limits were in place on the Twin Chain during the 2017-18 fishing season:

Species SeasonBag

LimitMin. Size

Largemouth Bass 5/6-3/4 5 14"Smallmouth Bass 5/6-6/16 Catch&Release

6/17-3/4 5 14"Musky 5/27-11/30 1 40"Northern Pike 5/6-3/4 5 noneWalleye 5/3-3/4 3 15"

Panfish year round 25 noneRock Bass year round none none

20"-24" Protected Slot, 1>24"

SPECIES CATCH AND HARVEST INFORMATION Angling effort, catch, and harvest information is summarized for each species in Table 2 and Figures 1-10. Table 2 also includes a comparison of these statistics with the previous creel survey. Information presented about species whose fishing season extends beyond March 4 should be considered minimum estimates. Each species page has up to five graphs depicting the following: 1. ESTIMATED FISHING EFFORT Total calculated number of hours

during each month that anglers spent fishing for a species.

2. ESTIMATED CATCH AND

HARVEST Calculated number of fish of the

indicated species caught or harvested by all anglers, regardless of targeted species.

Twin Chain

3

3. ESTIMATED SPECIFIC CATCH AND HARVEST RATES

Calculated number of hours it takes an angler to catch or harvest a fish of the indicated species. Only information from anglers who were specifically targeting that species is reported.

4. LENGTH DISTRIBUTION OF HARVESTED FISH

All fish of a species that were measured by the clerk during the entire creel survey season.

5. LARGEST AND AVERAGE LENGTH OF HARVESTED FISH

Monthly largest and average length of harvested fish of a species. Only fish measured by the creel survey clerk are reported.

CREEL SURVEY RESULTS AND DISCUSSION

Survey Logistics We encountered no unusual problems conducting the survey or calculating the projections contained in the report. This was the fourth time the Department conducted a creel survey on the Twin Chain. The last creel survey took place in 2007-08. General Angler Information Anglers spent 52,169 hours, or 15.2 hours per acre, fishing the Twin Chain during the 2017-18 season (Table 1). That was less than the Vilas County average of 34.8 hours per acre, and less than the fishing effort documented during the 2007-08 creel survey (27.4 hours per acre). July was the most heavily fished month (3.1 hours), and fishing effort was lightest in December (0.1 hours). The creel clerks were able to conduct 783 interviews throughout the survey.

RESULTS BY SPECIES Walleye (Table 2, Figure 1) Walleye received the most fishing effort of any gamefish species during the season. Anglers spent 24,430 hours targeting Walleye. The greatest fishing effort for Walleye was in May (5,467 hours). December had the least amount of Walleye fishing effort (274 hours).

Total catch of Walleye was 9,016 fish, with a harvest of 2,322. Highest catch (2,949 fish) and highest harvest (823 fish) occurred in May. Anglers fished an average of 2.7 hours to catch, and 10.6 hours to harvest, a Walleye during the survey. The mean length of harvested Walleye was 16.2 inches, and the largest measured was a 19.9-inch fish.

Northern Pike (Table 2, Figure 2) Fishing effort directed at Northern Pike was 2,484 hours during the season. Northern Pike fishing effort was greatest in February (949 hours). Total catch of Northern Pike was 105 fish, with a harvest of 12. Anglers fished an average of 94.3 hours to catch a Northern Pike during the survey. The mean length of harvested Northern Pike was 26.9 inches, and the largest measured was a 28.7-inch fish.

Muskellunge (Table 2, Figure 3) Anglers spent 13,277 hours targeting Muskellunge during the season. Muskellunge fishing effort was greatest in August (3,993 hours). Total catch of Muskellunge was 149 fish, and the highest catch (57 fish) occurred in July. Anglers fished 112.4 hours to catch a Muskellunge, and there was no documented harvest during the survey.

Smallmouth Bass (Table 2, Figure 4) Fishing effort targeted at Smallmouth Bass was 3,316 hours during the season.

4

Smallmouth Bass fishing effort was greatest in July (1,199 hours). Total catch of Smallmouth Bass was 530 fish, with 20 harvested. Highest catch (158 fish) occurred in September. Anglers fished an average of 11.1 hours to catch a Smallmouth Bass during the survey.

Largemouth Bass (Table 2, Figure 5) Fishing effort directed at Largemouth Bass was 3,326 hours during the season. Largemouth Bass fishing effort was greatest in July (1,093 hours). Total catch of largemouth bass was 2,249 fish, with a harvest of 7. Highest catch (813 fish) occurred in June. Anglers fished an average of 1.9 hours to catch a Largemouth Bass during the survey. Panfish (Table 2, Figures 6-10) Yellow Perch were the most sought after panfish species during the survey. Fishing effort directed at Yellow Perch was 20,257 hours. Total catch of Yellow Perch was 42,846 fish, with 11,452 harvested. The mean length of Yellow Perch harvested was 8.7 inches.

Bluegill received 10,181 hours of directed fishing effort. Total catch of Bluegill was 14,025 fish, with 3,417 harvested. The mean length of Bluegill harvested was 6.6 inches.

Black Crappie received 9,700 hours of directed fishing effort. Anglers caught 1,363 Black Crappie and harvested 785. The mean length of Black Crappie harvested was 11.1 inches.

Pumpkinseed received 948 hours of directed fishing effort. Anglers caught 1,646 Pumpkinseed and harvested 860. The mean length of Pumpkinseed harvested was 6.5 inches.

Rock Bass received only 525 hours of directed fishing effort. However, anglers caught 2,710 Rock Bass and harvested 751. The mean length of Rock Bass harvested was 8.5 inches. Other Species Cisco and White Sucker were also caught at low numbers in the Twin Chain. ACKNOWLEDGMENTS The Department would like to thank all the anglers who took the time to offer information about their fishing trip to the survey clerk. Without their cooperation, the survey would not have been possible.

We also thank our cooperators, Marti and Jen Primich of North Twin Lodge, who generously allowed the Department to keep a boat and snowmobile on their property during this survey.

Completion of this survey was possible because of the efforts of the following fisheries management and treaty fisheries staff: Lawrence Eslinger, Jeff Blonski, Joelle Underwood, Jason Halverson, John Kubisiak, Bob Consolo, Hadley Boehm, Tim Tobias, and Steve Gilbert. Creel clerks on Twin Chain during the survey period were Rich Cechal, Marty Kiepke, and Eric Brown.

This creel report was reviewed by John Kubisiak, Lawrence Eslinger, and Hadley Boehm of the Wisconsin Department of Natural Resources, Woodruff, Wisconsin.

Additional copies of this report, and those covering other local lakes, can be obtained from the Woodruff DNR or online at: http://dnr.wi.gov/topic/Fishing/north/trtycrlsrvys.html

Month

Number of Angler Party

InterviewsTotal Angler

HoursTotal Angler Hours/Acre

2007-08 Total Angler

Hours/Acre

Vilas County Average

Hours/Acre

Ceded Territory Average

Hours/AcreMay 123 6898 2.0 3.5 5.3 5.0June 108 6714 2.0 5.6 6.9 6.4July 119 10707 3.1 4.7 7.3 6.8August 93 8624 2.5 3.5 6.4 5.5September 122 7579 2.2 2.9 4.2 3.3October 113 4522 1.3 1.5 2.0 1.5December 15 403 0.1 1.2 0.6 1.1January 46 2959 0.9 1.5 0.9 1.6February 38 3367 1.0 2.7 1.0 1.6March 6 397 0.1 0.2 0.2 0.2*Summer Total 678 45044 13.1 21.7 32.1 28.5*Winter Total 105 7125 2.1 5.7 2.7 4.5Grand Total 783 52169 15.2 27.4 34.8 33.0

*"Summer" is May-October; "Winter" is December-March

Table 1. Sportfishing effort summary, Twin Chain, 2017-18 season compared with 2007-08 creel results, Vilas County, and Ceded Territory averages.

County Average Hours/Acre is the average angler effort in hours per acre for county lakes that have been surveyed since 1990. This value is useful for fishing pressure comparisons with other waters.

Ceded Territory Average Hours/Acre is the average angler effort in hours per acre for inland lakes in the Ceded Territory that have been surveyed since 1990. This value can be used to compare the Twin Chain to other lakes in northern Wisconsin.

Number of Angler Party Interviews is the number of groups of anglers interviewed by the creel clerk. A party is considered the members of a group who fish together in the same boat, ice shanty, or from shore. The clerk fills out one interview form for each group of anglers. The number of individual anglers actually contacted by the clerk is usually much greater than the number of groups listed in this table since most groups consist of more than one angler.

Total Angler Hours is the estimated total number of hours that anglers spent fishing on the Twin Chain during each month surveyed.

Total Angler Hours/Acre is the total angler hours divided by the area of the lake in acres. This is useful in order to compare effort on the Twin Chain to other lakes.

2007-08 Total Angler Hours/Acre is the total angler hours divided by the area of the lake in acres. This is from the previous creel survey that took place on the Twin Chain.

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Table 2. Comparison of creel survey synopses, Twin Chain, 2017-18 and 2007-08 fishing seasons.

CREEL YEAR: 2017-18

SPECIES

DIRECTEDEFFORT(Hours)

PERCENTOF TOTAL

TOTALCATCH

SPECIFICCATCHRATE

(Hrs/Fish) *TOTAL

HARVEST

SPECIFICHARVEST

RATE(Hrs/Fish) **

MEANLENGTH OFHARVESTED

FISHWalleye 24430 27.6% 9016 2.7 2322 10.6 16.2Northern Pike 2484 2.8% 105 94.3 12 26.9Muskellunge 13277 15.0% 149 112.4 0Smallmouth Bass 3316 3.7% 530 11.1 20 16.8Largemouth Bass 3326 3.8% 2249 1.9 7 500.0 15.0Yellow Perch 20257 22.9% 42846 0.5 11452 1.8 8.7Bluegill 10181 11.5% 14025 0.8 3417 3.1 6.6Black Crappie 9700 11.0% 1363 7.2 785 12.4 11.1Pumpkinseed 948 1.1% 1646 0.7 860 1.2 6.5Rock Bass 525 0.6% 2710 0.9 751 1.2 8.5

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* A blank cell in this column indicates that no fish of a given species were caught by anglers who specifically targeted that species.** A blank cell in this column indicates that no fish of a given species were harvested by anglers who specifically targeted that species.

CREEL YEAR: 2007-08

SPECIES

DIRECTEDEFFORT(Hours)

PERCENTOF TOTAL

TOTALCATCH

SPECIFICCATCHRATE

(Hrs/Fish)TOTAL

HARVEST

SPECIFICHARVEST

RATE(Hrs/Fish)

MEANLENGTH OFHARVESTED

FISHWalleye 44278 35.1% 22052 2.0 3801 11.7 15.9Northern Pike 4121 3.3% 2216 6.0 880 10.2 23.9Muskellunge 31466 24.9% 592 57.1 26 1208.8 43.8Smallmouth Bass 1661 1.3% 498 9.3 12 142.9 14.3Largemouth Bass 902 0.7% 561 6.6 20 44.6 15.3Yellow Perch 25900 20.5% 39481 0.7 15009 1.8 8.6Bluegill 14834 11.8% 22531 0.7 7258 2.1 6.7Black Crappie 1044 0.8% 210 7.7 106 9.8 10.6Pumpkinseed 1868 1.5% 1764 1.2 669 3.4 6.4Rock Bass 73 0.1% 402 1.3 85 1.3 7.7

7

1.9 2.77.3 3.9 1.7 1.8

12.77.3 6.9 4.86.6 8.5

27.2

13.88.2 9.8

85.5

15.6

29.0

17.5

0

20

40

60

80

100

MAY JUN. JUL. AUG. SEP. OCT. DEC. JAN. FEB. MAR.

HO

UR

S P

ER

FIS

H

MONTH

PROJECTED SPECIFIC CATCH AND HARVEST RATES

CATCH HARVEST

2949

1038

439649

2158

1013

34249

41869

823

332115 184

442200

3 109 97 170

750

1500

2250

3000

3750


NU

MB

ER

OF

FIS

H

MONTH

PROJECTED CATCH AND HARVEST

CATCH HARVEST

149

79

41

147

0

40

80

120

160

7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

NU

MB

ER

OF

FIS

H

INCHES

LENGTH DISTRIBUTION OF FISH MEASURED BY THE CREEL CLERK

16.0 16.5 16.5 16.4 16.0 16.415.0

16.5 16.3 15.8

19.9 19.918.2

19.2 19.9 19.5

15.0

18.917.9

15.9

0

5

10

15

20

25


INC

HE

S

MONTH

AVERAGE AND LARGEST LENGTH OFFISH HARVESTED

AVERAGE LARGEST

5467

28203121

2536

3616

1782

274

1706

2807

301

0

1500

3000

4500

6000


AN

GL

ING

HO

UR

S

MONTH

PROJECTED FISHING EFFORT

WALLEYE

Figure 1. Walleye sportfishing effort, catch, harvest, and length distribution, the Twin Chain, during 2017-18.

8

0.0 0.0 0.0 0.0 0.0 0.0 0.0

137.0

87.0

15.0

0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.00

30

60

90

120

150


HO

UR

S P

ER

FIS

H

MONTH


CATCH HARVEST

18 17

0 0

17

6

0

8

28

11

57

0 0 0 0 0 0 0 00

6

12

18

24

30


NU

MB

ER

OF

FIS

H

MONTH


CATCH HARVEST

1 1

0

1

2

10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35

NU

MB

ER

OF

FIS

H

INCHES


28.7

25.0

28.7

25.0

0

6

12

18

24

30

36


INC

HE

S

MONTH


AVERAGE LARGEST

25

252

145180 182

23 21

535

949

172

0

200

400

600

800

1000


AN

GL

ING

HO

UR

S

MONTH


NORTHERN PIKE

Figure 2. Northern Pike sportfishing effort, catch, harvest, and length distribution, the Twin Chain, during 2017-18.

9

49.8 82.0 74.6

900.9

138.957.1

0.0 0.0 0.0 0.00.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.00

200

400

600

800

1000


HO

UR

S P

ER

FIS

H

MONTH


CATCH HARVEST

15

34

57

4

1722

0 0 0 00 0 0 0 0 0 0 0 0 00

10

20

30

40

50

60


NU

MB

ER

OF

FIS

H

MONTH


CATCH HARVEST

255

1957

35343993

2373

1165

0

1000

2000

3000

4000

5000


AN

GL

ING

HO

UR

S

MONTH


MUSKELLUNGE

Figure 3. Muskellunge sportfishing effort, catch, harvest, and length distribution, the Twin Chain, during 2017-18.

10

0.0 0.0

15.9 15.3

5.97.1

0.0 0.0 0.0 0.00.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.00

3

6

9

12

15

18


HO

UR

S P

ER

FIS

H

MONTH


CATCH HARVEST

10

68

153

110

158

100

21

0 00 0

20

0 0 0 0 0 0 00

40

80

120

160

200


NU

MB

ER

OF

FIS

H

MONTH


CATCH HARVEST

1

0

1

2

5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

NU

MB

ER

OF

FIS

H

INCHES

LENGTH DISTRIBUTION OF FISH MEASURED BY THE CREEL CLERK 16.8 16.8

0

3

6

9

12

15

18


INC

HE

S

MONTH


AVERAGE LARGEST

72175

1199

866926

57 21 00

300

600

900

1200

1500


AN

GL

ING

HO

UR

S

MONTH


SMALLMOUTH BASS

Figure 4. Smallmouth Bass sportfishing effort, catch, harvest, and length distribution, the Twin Chain, during 2017-18.

11 1.3 0.63.6 2.0 2.5

0.0

6.5

0.0 0.0 0.00.0

55.2

0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.00

15

30

45

60


HO

UR

S P

ER

FIS

H

MONTH


CATCH HARVEST

99

813

405476 453

0 3 0 0 00 7 0 0 0 0 0 0 0 00

200

400

600

800

1000


NU

MB

ER

OF

FIS

H

MONTH


CATCH HARVEST

1

0

1

2

10 11 12 13 14 15 16 17 18 19 20

NU

MB

ER

OF

FIS

H

INCHES


15.0 15.0

0

3

6

9

12

15

18


INC

HE

S

MONTH


AVERAGE LARGEST

72

371

1093

824915

30 21

0

300

600

900

1200


AN

GL

ING

HO

UR

S

MONTH


LARGEMOUTH BASS

Figure 5. Largemouth Bass sportfishing effort, catch, harvest, and length distribution, the Twin Chain, during 2017-18.

12

0.51.0

0.5 0.5

1.7

0.1

1.20.6 0.7 0.6

1.7

4.4

2.1 1.8

7.2

0.5

9.0

2.02.5 2.4

0

2

4

6

8

10


HO

UR

S P

ER

FIS

H

MONTH


CATCH HARVEST

2245 2191

10838

5971

1203

10230

275

5145

4060

688690 456

22611569

263

3365

35

1477 1170166

0

3000

6000

9000

12000


NU

MB

ER

OF

FIS

H

MONTH


CATCH HARVEST

1 3

22

120

134

111

41

23

61

0

30

60

90

120

150

3 4 5 6 7 8 9 10 11 12 13 14

NU

MB

ER

OF

FIS

H

INCHES


9.4 9.0 8.3 8.1 8.1 8.6 8.29.3

8.6

11.9 11.812.9

11.510.4

11.3

9.3

15.3

10.5

0

4

8

12

16

20


INC

HE

S

MONTH


AVERAGE LARGEST

970

1872

4746

2760

19061519

315

2907 2865

397

0

1000

2000

3000

4000

5000


AN

GL

ING

HO

UR

S

MONTH


YELLOW PERCH

Figure 6. Yellow Perch sportfishing effort, catch, harvest, and length distribution, the Twin Chain, during 2017-18.

13

2.1

0.5 0.8 0.6 0.70.0

0.6

1.7 1.71.3

0.0

2.4

5.1

1.0

4.3

0.0

4.2

6.35.8

5.0

0

2

3

5

6

8


HO

UR

S P

ER

FIS

H

MONTH


CATCH HARVEST

114

3031

4326

3091

1236

35670

842 821

1380

644 675

1346

183 55 10233 237

340

1000

2000

3000

4000

5000


NU

MB

ER

OF

FIS

H

MONTH


CATCH HARVEST

15

22

55 54

9

0

15

30

45

60

3 4 5 6 7 8 9 10

NU

MB

ER

OF

FIS

H

INCHES


6.7 6.6 6.6

5.26.1

6.67.0

8.5 8.9 8.5

6.36.8 6.8

7.5

0

2

4

6

8

10


INC

HE

S

MONTH


AVERAGE LARGEST

191

1549

3189

1390

792

8 40

1471 1379

172

0

800

1600

2400

3200

4000


AN

GL

ING

HO

UR

S

MONTH


BLUEGILL

Figure 7. Bluegill sportfishing effort, catch, harvest, and length distribution, the Twin Chain, during 2017-18.

14 3.3 3.0

48.8

9.00.0 3.2 0.0

6.4

30.7

0.09.0 4.5

98.0

9.60.0

5.30.0

17.2

30.7

0.00

30

60

90

120


HO

UR

S P

ER

FIS

H

MONTH


CATCH HARVEST

277

654

55

145

9 20 0

179

24 0

103

427

28

124

0 12 067

24 00

150

300

450

600

750


NU

MB

ER

OF

FIS

H

MONTH


CATCH HARVEST

2

10

17

27

9

2 10

8

16

24

32

3 4 5 6 7 8 9 10 11 12 13 14

NU

MB

ER

OF

FIS

H

INCHES


11.7 11.012.1

11.1 10.79.9

14.512.9 13.0

11.812.8

10.5

0

3

6

9

12

15

18


INC

HE

S

MONTH


AVERAGE LARGEST

929

1932

2707

1192

780

64 40

1148

736

172

0

500

1000

1500

2000

2500

3000


AN

GL

ING

HO

UR

S

MONTH


BLACK CRAPPIE

Figure 8. Black Crappie sportfishing effort, catch, harvest, and length distribution, the Twin Chain, during 2017-18.

15 0.0

0.8

1.7

0.30.8

0.0 0.0 0.0 0.0 0.00.0

3.1

7.5

0.3

4.1

0.0 0.0 0.0 0.0 0.00

2

4

6

8


HO

UR

S P

ER

FIS

H

MONTH


CATCH HARVEST

12

300 313

697

195129

0 0 0 00

72 78

646

27 370 0 0 0

0

150

300

450

600

750


NU

MB

ER

OF

FIS

H

MONTH


CATCH HARVEST

1

11 1110

1

0

3

6

9

12

3 4 5 6 7 8 9 10

NU

MB

ER

OF

FIS

H

INCHES


6.8 6.86.3

7.1

5.0

7.9 7.8 8.07.3

5.2

0

2

4

6

8

10


INC

HE

S

MONTH


AVERAGE LARGEST

0

224

433

181

110

00

100

200

300

400

500


AN

GL

ING

HO

UR

S

MONTH


PUMPKINSEED

Figure 9. Pumpkinseed sportfishing effort, catch, harvest, and length distribution, the Twin Chain, during 2017-18.

16

0.0

1.2

0.0

0.6

2.6

0.0 0.0 0.0 0.0 0.00.0

1.2

0.0

1.0

2.6

0.0 0.0 0.0 0.0 0.00

1

2

3


HO

UR

S P

ER

FIS

H

MONTH


CATCH HARVEST

140

713

377

931

183 203

070 82

11587

18

531

52 37 0 21 0 00

200

400

600

800

1000


NU

MB

ER

OF

FIS

H

MONTH


CATCH HARVEST

2

10

18

8

4

0

4

8

12

16

20

3 4 5 6 7 8 9 10 11 12

NU

MB

ER

OF

FIS

H

INCHES


10.2

8.08.5

8.9

7.68.6

6.9

10.29.6

8.7

10.4

9.0 8.8

6.9

0

3

6

9

12


INC

HE

S

MONTH


AVERAGE LARGEST

0

66

0

326

133

0 0 0 00

75

150

225

300

375


AN

GL

ING

HO

UR

S

MONTH


ROCK BASS

Figure 10. Rock Bass sportfishing effort, catch, harvest, and length distribution, the Twin Chain, during 2017-18.

north and south twin lake chain · 2017. 4. 12. · the twin chain is located in vilas county near...

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