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FISHERIES MANAGEMENT……………………..….. we make fishing better
Net Pen Collaborators MeetingJune 26, 2019
1) Gills Rock2) Marinette3) Algoma4) Kewaunee5) Port Washington6) Milwaukee7) Racine8) Kenosha (pond)
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FISHERIES MANAGEMENT……………………..….. we make fishing better
QuestionnaireNet Pen Feedback Questionnaire
Prepared for Wed June 26, 2019 Net Pen Collaborators Meeting
Feedback provided by (name): _________________________
Group/club affiliation: _________________________
Name of net pen port: _________________________ What are some highlights, implemented improvements, or challenges overcome with your pens, that other groups could learn or benefit from? Are there any ongoing challenges or concerns with your pens, and ideas for resolution? From each groups perspective, is there anything DNR could do differently to help facilitate net pens? Is there anything your group could do differently to help facilitate net pens? Does your group use the Google calendar for schedulded stocking dates? If so, is it helpful? Does your group prefer changing or expanding net pen projects now (e.g., holding for longer than two weeks), or waiting for study results to help guide future decisions? Is your group interested in holding fish longer than two weeks if temp, DO, and rearing capacity are adequate (some groups have expressed interest, but does everyone want to do this?)? If greater pen capacity is needed to accommodate possibly holding fish longer, what is each group’s interest and ability to build additional pens (pros and cons)? Any other ideas, thoughts, or suggestions? What has worked well? What could be improved? (space for additional feedback provided on back side of this page…)
Nick LeglerFisheries Biologist – WI DNR110 S Neenah AvenueSturgeon Bay WI, 54235Phone: (920) [email protected]
• Gather feedback• Questionnaire &
discussion• Net pens several years,
now etc.
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Net Pen Discussion Outline1. DNR Presentation
a) history, collaborations, guidanceb) Temp / D.O. monitoring recordsc) CWT studyd) 3 weeks, net designse) rearing density by Jesse
2. Group Introductionsa) name, pen location, & affiliationb) Initial comments or feedback (optional)
3. Group discussions & feedback
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Initial Net Pens in WI, Lake MI
Kewaunee 2013 (6 year ago)
Milwaukee
Marinette
2013 & earlier: A facility which rears fish must be licensed as a fish farm (Chapter ATCP 10.61)Since (2014 & on…): Law changed, can use net pens with feeding for stocking/fish management, with permit & cooperative agreement
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Summary of Recent (2019) Net Pens with Feeding ≤ 2 Weeks
Location Dates Species NumberMarinette May 8-22 Chinook 14,425Gills Rock May 2-16 Chinook 16,682Algoma April 22-May 6 Chinook 24,007Kewaunee April 19-May 3 Chinook 24,000Port Washington April 29-May 8,13 Chinook 45,318Racine April 24-May 8 Chinook 42,079Kenosha (pond) April 23-May 7 Chinook 40,062
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Summary of Recent (2019) Acclimation Pens without Feeding ≤36 hrs.
Location (4) Dates Species (4) NumberGills Rock May 2 Chinooks 16,682Port Washington March 12 Arlee 13,128Port Washington March 14;
March 20Coho 16,973;
6,245Port Washington March 18 Browns 11,193Port Washington May 9 Chinooks 47,084Milwaukee April 29-30 Chinooks 89,847Racine March 28 Browns 18,736Racine March 28 Coho 11,718
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Collaborations & RolesPeople, Clubs, & Agency Depts.
Port WashingtonSport FishingGroups & Clubs• Building Pens• Monitoring• Feeding• Releasing• Enthusiasm!
DNR Fish Hatcheries• Provide fish• Provide food• Expertise!• Guidance on
feeding, capacity, etc.• Jesse
DNR Water Regs Staff• Net pen
permitting
Riparian Owners & Marinas• Land / access to
place & use pens
DNR Fish Management• Middle man• Day to day contact & ?• Fish sampling & logistics• Nick, Tammie, Aaron
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Gills Rock Chinook Net Pens ‐ 2015
Commercial Fishermen
Charter Anglers
DNR
• 10,000 Chinooks (1/3 quota) held & fed (May 13‐27)• 20,000 Chinooks (2/3 quota) held until dark
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Guiding DocumentsMarinette
1. Laws, Water Regs, Permits
2. WDNR Fisheries Management Work Plan
3. Cooperative Agreement
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FISHERIES MANAGEMENT……………………..….. we make fishing better
GENERAL PERMIT TO PLACE NET PEN STRUCTURES INGREAT LAKES WATER BODIES AND THEIR TRIBUTARIES FOR THE PURPOSE OF HOLDING OR REARING FISH FOR
NONCOMMERCIAL PURPOSES
• Several criteria & requirements (starting 2014)– https://dnr.wi.gov/topic/fishing/outreach/netpe
ns.html
• 5 year duration– check expiration dates!– apply for several locations (e.g., Algoma,
Kewaunee)!
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Net Pen Placement Considerations• General Permit:
– net pen(s) must allow an area for boating traffic & open water navigation at least 150 ft. wide between the waterward side of the net pen(s) and the opposite shore’s line of navigation (3 ft. water depth as defined in Wis. Admin. Code s. NR 326.03(4).
– no net pens within a federally designated channel– pens must be placed at least 100 feet away from a bridge, designated
swimming area, etc.
• WDNR Fisheries Management Work Plan / Guidance:– accessibility for the hatchery truck– decent but not excessive water flow to help with dissolved oxygen, water temps,
& disposal of waste / uneaten food– water clearance under and around the pen (ideally 3 feet)
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FISHERIES MANAGEMENT……………………..….. we make fishing better
New Algoma Net Pen (2018)
Algoma 2018; Photo courtesy of Ryan Baker.
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Net Placement Considerations –New Algoma Net Pen (2018)
Net Placement Considerations – New Algoma Net Pen (2018)
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Kewaunee Net Pen Site 4/16/2018
Kewaunee 2018; Photo courtesy of Ryan Baker.
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FISHERIES MANAGEMENT……………………..….. we make fishing better
New Kewaunee Net Pen (2019)Kewaunee
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Guiding DocumentsMarinette
1. Laws, Water Regs, Permits
2. WDNR Fisheries Management Work Plan
3. Cooperative Agreement
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FISHERIES MANAGEMENT……………………..….. we make fishing better
WDNR Fisheries Management Work Plan & Cooperative Agreement
• Monitoring & Record Keeping• temperature• dissolved oxygen• amount of feed• mortalities• signs of stress• conditions of the pen
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Initial (2014, 2015) Summary of Action Levels:
• If the water temperature goes above 60F, the cooperator must contact the local fisheries biologist and prepare to release the fish. When water temperatures reach 60F, the Cooperator must coordinate with the local fisheries biologist and the fish health professional to schedule a time to sample the fish prior to release.
• If water temperature goes above 65F the fish must be released within 16 hours of that event.”
• Water temp above 60oF = concerned• Water temp above 65oF = very concerned• Dissolved oxygen below 7 mg/L• Signs of stress (lethargy, unusual color, erratic swimming behavior,
flashing, piping, crowding areas, spreading out evenly, riding high in the water)
Details for Temp & DO Action Levels:
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Temperature Criteria (i.e., 2016 on)
• “If the water temperature at the time of stocking or during the time the fish are in the net pens goes above 60F the cooperator must immediately notify the Department AND must prepare to release the fish. The fish must be released within 18 hours of that event.”
2015
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Temperature Monitoring Results
1) Gills Rock2) Marinette3) Algoma4) Kewaunee5) Port Washington6) Milwaukee (≤36 hrs.)7) Racine8) Kenosha (pond)
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Temperature Monitoring ResultsGills Rock (2015-2019)
35
40
45
50
55
60
65
5/11/2015 5/16/2015 5/21/2015 5/26/2015 5/31/2015
Gills Rock 2015
35
40
45
50
55
60
65
4/30/2016 5/5/2016 5/10/2016 5/15/2016 5/20/2016
Gills Rock 2016
35
40
45
50
55
60
65
4/30/2017 5/5/2017 5/10/2017 5/15/2017 5/20/2017
Gills Rock 2017
35
40
45
50
55
60
65
4/30/2018 5/5/2018 5/10/2018 5/15/2018 5/20/2018
Gills Rock 2018
35
40
45
50
55
60
65
4/30/2019 5/5/2019 5/10/2019 5/15/2019
Gills Rock 2019
Overview:• Increasing trends• Cool, below 60F• Warmest = 55.0
May 25, 2015
Tem
pera
ture
(F)
Date
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Hwy 42
Net Pen Location
• Located in northern Door County• The site property address is
12695 State Hwy 42• By Weborg's commercial fishing dock• Local volunteer contact is:
Don Grasse (920‐421‐1510)• Local DNR contact is:
Nick Legler (920‐559‐0767)
Pen Location
Gills Rock Pen Stocking – Spring 2016
Gills Rock – Unique Pen Site (no river)
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Temperature Monitoring ResultsMenominee River (2014-2019)
Tem
pera
ture
(F)
Date
35
40
45
50
55
60
65
4/21/2014 5/1/2014 5/11/2014 5/21/2014
Menominee River 2014
35
40
45
50
55
60
65
4/26/2015 5/1/2015 5/6/2015 5/11/2015
Menominee River 2015
35
40
45
50
55
60
65
4/30/2016 5/5/2016 5/10/2016 5/15/2016
Menominee River 2016
35
40
45
50
55
60
65
4/30/2017 5/5/2017 5/10/2017 5/15/2017
Menominee River 2017
35
40
45
50
55
60
65
4/30/2018 5/5/2018 5/10/2018 5/15/2018
Menominee River 2018
35
40
45
50
55
60
65
5/5/2019 5/10/2019 5/15/2019 5/20/2019 5/25/2019
Menominee River 2019
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Temperature Monitoring ResultsAlgoma (2018-2019)
Tem
pera
ture
(F)
Date
35
40
45
50
55
60
65
4/20/2018 4/25/2018 4/30/2018 5/5/2018 5/10/2018
Algoma 2018
35
40
45
50
55
60
65
4/20/2019 4/25/2019 4/30/2019 5/5/2019 5/10/2019
Algoma 2019
59.2 59.8
Still need to get & enter this data
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Temperature Monitoring ResultsKewaunee (2014-2019)
Tem
pera
ture
(F)
Date
35
40
45
50
55
60
65
4/21/20144/26/20145/1/20145/6/20145/11/20145/16/2014
Kewaunee 2014
35
40
45
50
55
60
65
5/1/2015 5/6/2015 5/11/2015 5/16/2015 5/21/2015
Kewaunee 2015
35
40
45
50
55
60
65
4/25/20164/30/2016 5/5/2016 5/10/20165/15/2016
Kewaunee 2016
35
40
45
50
55
60
65
4/25/20174/30/2017 5/5/2017 5/10/20175/15/2017
Kewaunee 2017
35
40
45
50
55
60
65
4/15/2018 4/20/2018 4/25/2018 4/30/2018 5/5/2018
Kewaunee 2018
35
40
45
50
55
60
65
4/15/2019 4/20/2019 4/25/2019 4/30/2019 5/5/2019
Kewaunee 2019
59.5, 60.1, 59.9
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Temperature Monitoring ResultsKewaunee (2015)
Tem
pera
ture
(F)
Date
35
40
45
50
55
60
65
5/1/2015 5/6/2015 5/11/2015 5/16/2015 5/21/2015
• Water Temps Higher than Ideal– Low 60’s first week, peaked 64.9F– High 50’s second week (& good DO)
• Past Net Pen Policy– 60 F = prepare to release the fish– 65 F = released fish within 16 hours
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Kewaunee Net Pen 2015
• 7 floating mortalities (May 17‐18)• 13 floating mortalities (May 19)• 51 dead or sick fish (May 20)
– 10 floating mortalities– 29 underwater/sunk mortalities– 12 live but sick
• ≥ 71 Total Mortalities
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FISHERIES MANAGEMENT……………………..….. we make fishing better
• Chinooks with visible tail/fin rot (n = 12) tested positive for Flavobacterium columnare and motile Aeromonas spp.
• The adipose fin clip was healed on all, but one of the fish, including the apparently healthy CHS (n = 10) and did not appear to be the route of infection.
• All fish had moderate mesenteric fat, and thus must have been feeding well overall.
Fish Health Results (2015)
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Conclusions from Fish Health Staff
• Columnaris infections are common in spring when water temps increase above 60 F
• Additional Factors for Net Pens– Younger fish are more susceptible– Crowding stress– Dead fish at bottom of pen shed bacteria– Poor water quality (e.g., increased particulates after rain)
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Net Pen Strawberry Creek
Wild Rose
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Photo courtse of Paul Schwengel, Gills Rock, 5/12/2019.
DNR Strawberry Creek Rearing Pond 2019
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Temperature Monitoring ResultsPort Washington (2015-2019)
Tem
pera
ture
(F)
Date
35.00
40.00
45.00
50.00
55.00
60.00
65.00
4/25/2019 4/30/2019 5/5/2019 5/10/2019 5/15/2019
Port Washington 2019
35.00
40.00
45.00
50.00
55.00
60.00
65.00
4/30/2018 5/5/2018 5/10/2018 5/15/2018 5/20/2018
Port Washington 2018
35.0
40.0
45.0
50.0
55.0
60.0
65.0
5/1/2017 5/3/2017 5/5/2017 5/7/2017 5/9/2017 5/11/2017 5/13/2017
Port Washington 2017
30.0
35.0
40.0
45.0
50.0
55.0
60.0
65.0
4/15/2016 4/20/2016 4/25/2016 4/30/2016 5/5/2016
Port Washington 2016
30.0
35.0
40.0
45.0
50.0
55.0
60.0
65.0
4/16/2015 4/21/2015 4/26/2015 5/1/2015 5/6/2015
Port Washington 2015Overview:• Relatively cool• Never above 60F• Highest was 56.3F
on May 13, 2019
Cold? Cold?
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Port Washington Temperatures Net Pen Location
Sauk Creek
Lake Michigan
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Temperature Monitoring ResultsRacine (2015-2019)
Tem
pera
ture
(F)
Date
35
40
45
50
55
60
65
4/26/2015 5/1/2015 5/6/2015 5/11/2015
Racine 2015
35
40
45
50
55
60
65
4/25/2016 4/30/2016 5/5/2016 5/10/2016 5/15/2016
Racine 2016
35
40
45
50
55
60
65
4/25/2017 4/30/2017 5/5/2017 5/10/2017 5/15/2017
Racine 2017
35
40
45
50
55
60
65
4/15/2018 4/20/2018 4/25/2018 4/30/2018 5/5/2018
Racine 2018
35
40
45
50
55
60
65
4/20/2019 4/25/2019 4/30/2019 5/5/2019 5/10/2019
Racine 2019
2015 – last 3 days about 58.1-63.5 F
2016 – reached 60 once
2017 – started at 60, but decreased
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Temperature Monitoring ResultsKenosha (pond; 2019)
Tem
pera
ture
(F)
Date
35.0
40.0
45.0
50.0
55.0
60.0
65.0
4/19/2019 4/21/2019 4/23/2019 4/25/2019 4/27/2019 4/29/2019 5/1/2019 5/3/2019 5/5/2019 5/7/2019
Kenosha 2019
Overview:• Fairly constant temp• Average 57.0F• Never quite at 60F• 59.0-59.9 (N= 9)
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Dissolved Oxygen (>7mg/l)
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Dissolved Oxygen MonitoringGills Rock (2015-2019)
Dis
solv
ed O
xyge
n (m
g/l)
Date
0
2
4
6
8
10
12
14
16
5/11/2015 5/16/2015 5/21/2015 5/26/2015 5/31/2015
Gills Rock 2015
0
2
4
6
8
10
12
14
16
4/30/2016 5/5/2016 5/10/2016 5/15/2016 5/20/2016
Gills Rock 2016
02
468
101214
16
4/30/2017 5/5/2017 5/10/2017 5/15/2017 5/20/2017
Gills Rock 2017
0
2
4
6
8
10
12
14
16
4/30/2017 5/5/2017 5/10/2017 5/15/2017 5/20/2017
Gills Rock 20180
2
4
6
8
10
12
14
16
4/30/2019 5/5/2019 5/10/2019 5/15/2019
Gills Rock 2019
Overview:• Good D.O.• Always above 7
mg/l• Lowest = 9.93
mg/l on 5/5/2019
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Dissolved Oxygen MonitoringMenominee River (2014-2019)
Dis
solv
ed O
xyge
n (m
g/l)
Date
0
2
4
6
8
10
12
14
16
4/21/2014 4/26/2014 5/1/2014 5/6/2014 5/11/2014 5/16/2014
Menominee River 20140
2
4
6
8
10
12
14
16
4/26/2015 5/1/2015 5/6/2015 5/11/2015
Menominee River 20150
2
4
6
8
10
12
14
16
5/2/2016 5/4/2016 5/6/2016 5/8/2016 5/10/2016 5/12/2016
Menominee River 2016
0
2
4
6
8
10
12
14
16
4/30/2017 5/5/2017 5/10/2017 5/15/2017
Menominee River 20170
2
4
6
8
10
12
14
16
4/30/2018 5/5/2018 5/10/2018 5/15/2018
Menominee River 20180
2
4
6
8
10
12
14
16
5/5/2019 5/10/2019 5/15/2019 5/20/2019 5/25/2019
Menominee River 2019
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Dissolved Oxygen MonitoringAlgoma (2018-2019)
Dis
solv
ed O
xyge
n (m
g/l)
Date
0
2
4
6
8
10
12
4/15/2019 4/20/2019 4/25/2019 4/30/2019 5/5/2019
Algoma 2018
0
2
4
6
8
10
12
14
4/20/2019 4/25/2019 4/30/2019 5/5/2019 5/10/2019Date
Algoma 2019
Low 6.99
Low 6 & 4.44
Still need to get & enter this data
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Dissolved Oxygen MonitoringKewaunee (2014-2019)
Dis
solv
ed O
xyge
n (m
g/l)
Date
02468
10121416
4/21/2014 4/26/2014 5/1/2014 5/6/2014 5/11/2014 5/16/2014
Kewaunee 2014
02468
1012141618
5/1/2015 5/6/2015 5/11/2015 5/16/2015 5/21/2015
Kewaunee 2015
02468
10121416
4/25/2016 4/30/2016 5/5/2016 5/10/2016 5/15/2016
Kewaunee 2016
0
2
4
6
8
10
12
14
16
4/25/2017 4/30/2017 5/5/2017 5/10/2017 5/15/2017
Kewaunee 2017
02468
10121416
4/15/2018 4/20/2018 4/25/2018 4/30/2018 5/5/2018
Kewaunee 2018
02468
10121416
4/15/2019 4/20/2019 4/25/2019 4/30/2019 5/5/2019
Kewaunee 2019
Low 7.83 Low 7.68
Low 6.99
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FISHERIES MANAGEMENT……………………..….. we make fishing better
02468
10121416
4/25/2019 4/30/2019 5/5/2019 5/10/2019 5/15/2019
Port Washington 2019
Dissolved Oxygen MonitoringPort Washington (2015-2019)
Dis
solv
ed O
xyge
n (m
g/l)
Date
02468
10121416
4/16/2015 4/21/2015 4/26/2015 5/1/2015 5/6/2015
Port Washington 2015
0.002.004.006.008.00
10.0012.0014.0016.00
5/1/20175/3/20175/5/20175/7/20175/9/20175/11/20175/13/2017
Port Washington 20170.002.004.006.008.00
10.0012.0014.0016.00
4/30/2018 5/5/2018 5/10/2018 5/15/2018 5/20/2018
Port Washington 2018
02468
10121416
4/15/2016 4/20/2016 4/25/2016 4/30/2016 5/5/2016
Port Washington 2016
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Dissolved Oxygen MonitoringRacine (2015-2019)D
isso
lved
Oxy
gen
(mg/
l)
Date
0.002.004.006.008.00
10.0012.0014.0016.00
4/20/2019 4/25/2019 4/30/2019 5/5/2019 5/10/2019
Racine 2019
0.002.004.006.008.00
10.0012.0014.0016.00
4/16/20184/18/20184/20/20184/22/20184/24/20184/26/20184/28/20184/30/20185/2/2018
Racine 2018
0.002.004.006.008.00
10.0012.0014.0016.00
4/25/2017 4/30/2017 5/5/2017 5/10/2017 5/15/2017
Racine 2017
0.002.004.006.008.00
10.0012.0014.0016.00
4/25/2016 4/30/2016 5/5/2016 5/10/2016 5/15/2016
Racine 2016
0.002.004.006.008.00
10.0012.0014.0016.00
4/28/20154/30/20155/2/20155/4/20155/6/20155/8/20155/10/2015
Racine 2015
Last day DO below 7
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Dissolved Oxygen MonitoringKenosha (2019)
Dis
solv
ed O
xyge
n (m
g/l)
Date
0.00
2.00
4.00
6.00
8.00
10.00
12.00
14.00
16.00
4/20/2019 4/25/2019 4/30/2019 5/5/2019 5/10/2019Date
Kenosha 2019
Overview:• Relatively stable DO• 8.46 min• 9.97 max• 9.19 avg
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Kewaunee May 14, 2014
Summary for Temp / DO:1) Temperature has mostly been ok,
but was high for some years & locations (>60F)2) Dissolved oxygen has routinely been good (>7 mg /l)3) Next up…are net pens effective & are they having a
positive impact?
4) Simple answer…
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Overall intent = very positive, & we’re all hopeful for positive results!
• Intent:– Improve survival & performance of stocked fish
• Why pens might improve survival?– Acclimation, growth, night release, deep water
release
• Why pens might improve performance?– Imprinting & fall returns
![Page 46: Net Pen Collaborators Meeting€¦ · 26/06/2019 · Kewaunee Net Pen 2015 • 7 floating mortalities (May 17‐18) • 13 floating mortalities (May 19) • 51 dead or sick fish](https://reader034.vdocuments.us/reader034/viewer/2022051913/6004a47ca9adf71e7f3f4971/html5/thumbnails/46.jpg)
FISHERIES MANAGEMENT……………………..….. we make fishing better
Other state have tried net pens, & very generally…
• The results have been mixed• Including:
– improved survival & returns– neutral– negative results
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Stocking of Chinook salmon from Net Pens in Lake Superior (2005‐2007)
Peter M. StevensLake Superior Fisheries Unit2013 Statewide Meeting
February 28, 2013
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• Clipped chinook did not return at a high enough rate to allow any meaningful analysis
• Two possible interpretations:– Inconclusive– Net pens not significantly better than traditional stocking
Stocking of Chinook salmon from Net Pens in Lake Superior (2005‐2007)
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FISHERIES MANAGEMENT……………………..….. we make fishing better
What about ‘our’ Chinooks & net pens in Wisconsin waters
of Lake Michigan?
How are we doing?
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Recoveries per 100,000 Fish Stocked – Stocking District
2011 year class 2013 year class2012 year classCan net pens in WI make an already good thing better?
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Net Pen Study Preliminary Results(2015, 2016, 2017 & 2018 CWT Kewaunee & Root)
![Page 52: Net Pen Collaborators Meeting€¦ · 26/06/2019 · Kewaunee Net Pen 2015 • 7 floating mortalities (May 17‐18) • 13 floating mortalities (May 19) • 51 dead or sick fish](https://reader034.vdocuments.us/reader034/viewer/2022051913/6004a47ca9adf71e7f3f4971/html5/thumbnails/52.jpg)
FISHERIES MANAGEMENT……………………..….. we make fishing better
2016
1 year olds / jacks (2015 year class)
Sampling Year (cont.…2020, 2021)
2017
1 year old / jacks (2016 year class)
2 year olds (2015 year class)
2018
1 year old / jacks (2 017 year class)
2 year olds (2016 year class)
3 year olds (2015 year class)
1 year old / jacks (2 018 year class)
2 year old / jacks (2 017 year class)
3 year olds (2016 year class)
4 year olds (2015 year class)
2019
Net Pen Study Preliminary Results(2015, 2016, 2017 & 2018 CWT Kewaunee & Root)
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FISHERIES MANAGEMENT……………………..….. we make fishing better
CWT Lot Codes for 2015 & 2016
Direct Stocked Kewaunee & Ahnapee Rivers
Direct Stocked Root River, Kenosha Harbor & Pike Rivers
Racine
Kenosha
Singe CWT Lot Each Year
Singe CWT Lot Each Year
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FISHERIES MANAGEMENT……………………..….. we make fishing better
CWT Lot Codes for 2015 & 2016
Root & Kewaunee RiverNet Pens (grouped/one CWT#)
Direct Stocked Kewaunee & Ahnapee Rivers
Direct Stocked Root River, Kenosha Harbor & Pike Rivers
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FISHERIES MANAGEMENT……………………..….. we make fishing better
CWT Lot Codes for 2017 (numbers below) & 2018
Kewaunee River Net Pen (23,000)
Root River Direct (51,028**)Root River Net Pen (31,300)
Kewaunee River Direct (22,894)
**43,561 ADCWT & 7,461 AD only
![Page 56: Net Pen Collaborators Meeting€¦ · 26/06/2019 · Kewaunee Net Pen 2015 • 7 floating mortalities (May 17‐18) • 13 floating mortalities (May 19) • 51 dead or sick fish](https://reader034.vdocuments.us/reader034/viewer/2022051913/6004a47ca9adf71e7f3f4971/html5/thumbnails/56.jpg)
FISHERIES MANAGEMENT……………………..….. we make fishing better
• Caveats / considerations:1. Straying may bias the results, likely to favor
direct stoked fish (2015 & 2016 year classes)2. Didn’t account for tag loss, yet…3. Didn’t look for statistical differences yet,
just plain data4. USFWS data analysist is likely to help with a
more thorough evaluation...5. Anticipate a lot more return data in the
coming 3 years…
Preliminary Results – Kewaunee River
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FISHERIES MANAGEMENT……………………..….. we make fishing better
2016
1 year olds / jacks (2015 year class)
2017
1 year old / jacks ( 2016 year class)
2 year olds (2015 year class)
2018
1 year old / jacks (2 017 year class)
2 year olds (2016 year class)
3 year olds (2015 year class)
1 year old / jacks (2 018 year class)
2 year old / jacks (2 017 year class)
3 year olds (2016 year class)
4 year olds (2015 year class)
2019
• Overall mixed results so far• Very preliminary• Some of the best opportunities for sampling are
still upcoming the next 3 years• Angler recoveries too…
Sampling Year (cont.…2020, 2021)
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Length / Weight Gills Rock 2015
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Gills Rock Net PenW
eigh
t (gr
ams)
Length (mm)
02468
1012141618
70 80 90 100 110 120
2015
05/13/201505/27/2015
0
1
2
3
4
5
6
7
60 70 80 90 100
2016
05/03/201605/17/2016
0123456789
10
70 80 90 100
2018
05/02/201805/16/2018
Weight/length data summary by
Jacob Steckmesser, DNR fisheries technician.
Weight/length data summary by
Jacob Steckmesser, DNR fisheries technician.
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Menominee River Net PenW
eigh
t (gr
ams)
Length (mm)
0123456789
10
60 70 80 90 100 110
2015
04/27/201505/07/2015
0
1
2
3
4
5
6
7
50 60 70 80 90
2016
05/03/201605/10/2016
0
2
4
6
8
10
12
14
60 80 100 120
2017
05/01/201705/14/2017
02468
10121416
60 80 100 120
2018
05/03/201805/14/2018
0
2
4
6
8
10
12
70 80 90 100 110
2019
05/08/201905/21/2019
Weight/length data summary by
Jacob Steckmesser, DNR fisheries technician.
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Algoma Net PenW
eigh
t (gr
ams)
Length (mm)
0123456789
10
70 80 90 100 110
Algoma 2018
04/23/2018
05/04/2018
Weight/length data summary by
Jacob Steckmesser, DNR fisheries technician.
Weight/length data summary by
Jacob Steckmesser, DNR fisheries technician.
![Page 62: Net Pen Collaborators Meeting€¦ · 26/06/2019 · Kewaunee Net Pen 2015 • 7 floating mortalities (May 17‐18) • 13 floating mortalities (May 19) • 51 dead or sick fish](https://reader034.vdocuments.us/reader034/viewer/2022051913/6004a47ca9adf71e7f3f4971/html5/thumbnails/62.jpg)
FISHERIES MANAGEMENT……………………..….. we make fishing better
Kewaunee Net PenW
eigh
t (gr
ams)
Length (mm)
0
2
4
6
8
10
12
14
50 70 90 110 130
2014
04/24/201405/14/2014
02468
10121416
60 80 100 120
2015
05/04/201505/13/2015
0
2
4
6
8
10
12
70 80 90 100 110
2016
04/27/201605/10/2016
0
2
4
6
8
10
12
70 80 90 100 110
2017
04/25/201705/09/2017
0
2
4
6
8
10
12
70 80 90 100 110
2018
04/20/201805/04/2018
Weight/length data summary by
Jacob Steckmesser, DNR fisheries technician.
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Port Washington Net PenW
eigh
t (gr
ams)
Length (mm)
0
2
4
6
8
10
12
70 80 90 100 110
2015
04/21/201505/05/2015
0
2
4
6
8
10
12
60 70 80 90 100
2016
04/19/201605/02/2016
0
2
4
6
8
10
12
14
60 70 80 90 100 110
2017
05/02/201705/16/2017
02468
10121416
70 80 90 100 110 120
2018
05/01/201805/15/2018
Weight/length data summary by
Jacob Steckmesser, DNR fisheries technician.
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Racine Net PenW
eigh
t (gr
ams)
Length (mm)
0
2
4
6
8
10
12
50 60 70 80 90 100
2015
04/28/201505/09/2015
0
2
4
6
8
10
12
70 80 90 100 110
2016
04/26/201605/10/2016
0
2
4
6
8
10
12
14
70 80 90 100 110
2017
04/26/201705/10/2017
0
2
4
6
8
10
12
60 70 80 90 100 110
2018
04/17/201805/01/2018
Weight/length data summary by
Jacob Steckmesser, DNR fisheries technician.
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Kenosha PondW
eigh
t (gr
ams)
Length (mm)
0
2
4
6
8
10
12
60 70 80 90 100 110
2015
04/21/201505/04/2015
0
2
4
6
8
10
12
60 70 80 90 100 110
2016
04/27/201605/09/2016
0
2
4
6
8
10
12
50 70 90 110
2017
05/01/201705/15/2017
02468
10121416
60 80 100 120
2018
04/26/201805/10/2018
0
2
4
6
8
10
12
70 80 90 100 110 120
2019
04/23/201905/07/2019
Weight/length data summary by
Jacob Steckmesser, DNR fisheries technician.
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0
2
4
6
8
10
12
14
50 60 70 80 90 100 110 120Length (mm)
Kewaunee River April 24
Kewaunee RiverMay 14
Strawberry CreekMay 16
Wild Rose HatcheryMay 16
Older Data From Kewaunee Net Pen Comparing Net Pen vs. Strawberry Creek vs. Wild Rose Hatchery
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Overall fish gook good, & in many cases some growth.
Gills Rock 2015
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Net Pen Discussion Outline1. I'm almost done here, but before we
get to Jesse & the discussion…a) holding fish an extra weekb) net pen designs
2. Introductions1. Name, pen location, & affiliation2. Initial comments or feedback (optional)
3. Group discussions & feedback
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FISHERIES MANAGEMENT……………………..….. we make fishing better
• Two week rearing period– Rearing density (grow into capacity, up to
50%)– Temp, DO, allotted food, etc.
• Some groups are interred in holding fish for longer (e.g., up to 3 weeks?).– Kewaunee example last year/2018– What does everyone think (pros, cons, &
logistics)?
DNR Guidance & Cooperative Agreement
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Pen Density & Availability• Pen Design & Construction
– Rigid frame & flexible netting– Length 15-10 feet X depth 5-6 feet
X width 5-6 feet– Removable pen covers– Freeboard, clearance, etc.
Kewaunee 2013
Gills Rock
Kewaunee 2019 Milwaukee
• Pros & Cons– Less fish vs. more
pens– Pen cost vs.
benefit?– Future study
results, to guide future net pen use?
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2019 NET PEN COOPERATORS MEETING
“NET PEN 103”
June 26, 2019Lakeshore Technical College
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TRAINING HISTORY
• PREVIOUS TRAINING SESSIONS
• APRIL 14TH, 2015 GREAT LAKES WATER INSTITUTE
• MARCH 16TH, 2016 WILD ROSE HATCHERY
• JUNE 26TH, 2019 LAKESHORE TECH
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ESTABLISHED STOCKING THRESHOLDS
• SAFE LOADING DENSITY IS ½ LB. OF FISH PER CUBIC FOOT OF WATER
• GROWTH IS PROJECTED BASED ON CONVERSION RATES AND GROWTH STANDARDS
• ALL OF THE NUMBERS THAT GET STOCKED INTO THE NET PENS ARE PROJECTED FORWARD TO UTILIZE THE MAXIMUM DENSITY OF THE NET PEN AT THE TIME OF RELEASE
• TEMPERATURE THRESHOLD 600F
• OXYGEN THRESHOLD 7MG/L
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EXAMPLE NET PEN CALCULATIONS
• FEED RATES ARE SET AS A % OF THE TOTAL WEIGHT OF THE FISH
• EVERY DAY THE FISH ARE EATING THEY ARE GROWING
• ADJUST FEED RATES WEEKLY
• A CONVERSION FACTOR ACCOUNTS FOR THE AMOUNT OF FISH MASS GAINED PER POUND OF FOOD FED
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PROJECTING GROWTH
• FISH CONVERSION
• 0.8 CONVERSION FACTOR
• EACH 0.8 LBS. OF FOOD FED YIELDS 1 ADDITIONAL POUND OF FISH.
WEEK 1• 20,000 fish @ 80 fish per pound = 250 lbs.• 250 lbs. fed at 1.5% = 3.75 lbs./day• 3.75 lbs./day x 7 days = 26.25 lbs./week• 26.25 lbs. with a 0.8 conversion ~33 lbs. gained
WEEK 2• Same 20,000 fish = 283 lbs (250+33)• 280 lbs. feed at 1.5% = 4.2 lbs./day• 4.2 lbs./day x 7 days = 29.4 lbs./week• 29.4 lbs. with a 0.8 conversion ~37 lbs. gained
RELEASE TIME• 317 lbs. (~63 fish per pound)
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CALCULATING NET PEN CAPACITIESSample Pen size 6’w x 23.5’L x 5’D with 6” of freeboard
• NET PEN HAS 634 FT3 (LESS FREEBOARD)
• @ ½ LB. PER CUBIC FOOT ALLOWS FOR 317 LBS. OF FISH
• PREVIOUS SCENARIO
• 20,000 FISH IN AT 80/LB. FED 1.5% FOR 2 WEEKS
• WHAT IF THE FISH ARE BIGGER?
• 317 LBS. OF CAPACITY
• 20,000 @ 63/LB.
• 19,000 @ 60/LB.
• 17,500 @ 55/LB.
• 15,850 @ 50/LB.
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Net Pen Discussion Outline1. DNR Presentation
a) history, collaborations, guidanceb) Temp / D.O. monitoring recordsc) CWT studyd) 3 weeks, net designse) rearing density by Jesse
2. Group Introductionsa) Name, pen location, & affiliationb) Initial comments or feedback (optional)
3. Group discussions & feedback
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FISHERIES MANAGEMENT……………………..….. we make fishing better
QuestionnaireNet Pen Feedback Questionnaire
Prepared for Wed June 26, 2019 Net Pen Collaborators Meeting
Feedback provided by (name): _________________________
Group/club affiliation: _________________________
Name of net pen port: _________________________ What are some highlights, implemented improvements, or challenges overcome with your pens, that other groups could learn or benefit from? Are there any ongoing challenges or concerns with your pens, and ideas for resolution? From each groups perspective, is there anything DNR could do differently to help facilitate net pens? Is there anything your group could do differently to help facilitate net pens? Does your group use the Google calendar for schedulded stocking dates? If so, is it helpful? Does your group prefer changing or expanding net pen projects now (e.g., holding for longer than two weeks), or waiting for study results to help guide future decisions? Is your group interested in holding fish longer than two weeks if temp, DO, and rearing capacity are adequate (some groups have expressed interest, but does everyone want to do this?)? If greater pen capacity is needed to accommodate possibly holding fish longer, what is each group’s interest and ability to build additional pens (pros and cons)? Any other ideas, thoughts, or suggestions? What has worked well? What could be improved? (space for additional feedback provided on back side of this page…)
Nick LeglerFisheries Biologist – WI DNR110 S Neenah AvenueSturgeon Bay WI, 54235Phone: (920) [email protected]
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FISHERIES MANAGEMENT……………………..….. we make fishing better
6. Does your group prefer changing or expanding net pen projects now (e.g., holding for longer than two weeks), or waiting for study results to help guide future decision
(pros & cons) 7. Is your group interested in holding fish longer than two weeks
if temp, DO, and rearing capacity are adequate (some groups have expressed interest, but does everyone want to do this?)?
(pros & cons) 8. If greater pen capacity is needed to accommodate possibly
holding fish longer, what is each group’s interest and ability to build additional pens (pros and cons)?
(pros & cons)9. Any other ideas, thoughts, or suggestions? What has worked
well? What could be improved?
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FISHERIES MANAGEMENT……………………..….. we make fishing better
1. What are some highlights, implemented improvements, or challenges overcome with your pens, that other groups could learn or benefit from?
(e.g., building new pens / designs)2. Are there any ongoing challenges or concerns with your pens,
and ideas for resolution?(e.g., several pen locations listed on new permits)
3. From each groups perspective, is there anything DNR could do differently to help facilitate net pens?
(e.g., Google calendar)4. Is there anything your group could do differently to help
facilitate net pens?(e.g., pen covers & easy access)
5. Does your group use the Google calendar for scheduled stocking dates? If so, is it helpful?
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FISHERIES MANAGEMENT……………………..….. we make fishing better
Algoma Net Pen 2018
Algoma 2018; Photo courtesy of Ryan Baker.
Thanks for all of your efforts & feedback!
1) Gills Rock2) Marinette3) Algoma4) Kewaunee5) Port Washington6) Milwaukee7) Racine8) Kenosha (pond)
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Discussion & Questions?
Nick Legler, Fisheries BiologistWisconsin Department of Natural Resources110 S Neenah Avenue, Sturgeon Bay WI, 54235920‐746‐[email protected]