the fishery of north brown’s lake joe stewig area fisheries manager 7/20/13
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The Fishery of North Brown’s Lake
Joe StewigArea Fisheries Manager
7/20/13
Outline
Montrose Area Resources
Lake Survey Description
Lake Survey Results
Future Plans
Montrose Area Resources
Standard Lake Survey
LMB Electrofishing
Curled Pondweed Mapping
Gill Net / Trap Net
Survey
Aquatic Vegetation Mapping
Outline
Montrose Area Resources
Lake Survey Description
Lake Survey Results
Moving forward
North Brown’s Lake
- 324 acres- 130 littoral acres- Avg. depth – 18’- Max. depth – 41’
- Walleye stocked in odd numbered years
LargemouthBass
7 8 9 10 11 12 13 14 15 16 17 18 190
1
2
3
4
5
6
7
8
9
Length Group (in)
Nu
mb
er
(N)
N = 33Avg TL = 14.8”Avg Wt = 2.3 lbsPSD = 81RSD15 = 58
Walleye
80 85 90 95 03 130
1
2
3
4
5
6
7
1.31.0
0.3
1.5 1.6
0.8
Survey Year
Fis
h/G
illn
et
Fall YOY WalleyeSurvival
2003 2005 2007 2009 20110
10
20
30
40
50
60
1.8
53.0
5.5 3.5
12.1
Year Class
Nu
mb
er/
hou
r
Northern Pike
80 85 90 95 03 130
3
6
9
12
15
18
21
5.3
8.3
10.7
19.218.2
16.7
Survey Year
Fis
h/G
illn
et
Northern Pike
18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 350
2
4
6
8
10
12
14
16
18
Length Group (in)
Nu
mb
er
(N)
N = 100Avg TL = 23.5”% > 24” = 34%% > 30” = 3%
Northern Pike
80 85 90 95 03 130
20
40
60
80
100
35
6875
5054
78
12 14
3 36
11
PSD RSD-28 PSD Goal RSD-28 Goal
Survey Year
Siz
e D
istr
ibu
tion
Channel Catfish
80 85 90 95 03 130
5
10
15
20
25
30
35
0.0 0.0 0.0 0.0 0.2
28.2
Survey Year
Fis
h/G
illn
et
Channel Catfish
15 16 17 18 19 20 21 22 23 24 25 26 270
10
20
30
40
50
60
Length Group (in)
Nu
mb
er
(N)
N = 228Avg TL = 19.2”Avg Wt = 2.4 lbs
Black Crappie
80 85 90 95 03 130
10
20
30
40
50
41.0
10.08.3 8.3 8.0
3.5
Survey Year
Fis
h/G
illn
et
Bluegill
80 85 90 95 03 130
20
40
60
80
100
120
8.516.3
111.5
15.0
28.4
14.1
Survey Year
Fis
h/T
rap
net
Yellow Perch
80 85 90 95 03 130
40
80
120
160
200
147.0
126.0
80.0
186.0
24.816.5
Survey Year
Fis
h/G
illn
et
Bullhead species
80 85 90 95 03 130
10
20
7.7
18.317.3
0.0
7.0
1.8
Survey Year
Fis
h/G
illn
et
Summary
WAE catch low, similar across surveys
NOP catch high; average size good
CCF have arrived!!! Bullhead catch decreased
BLC, BLG, and YEP catch normal
What’s next???
Change in stocking strategy???
Liberalized catfish limit???
Summarize plant data and final write-up
Questions
More Information: Montrose Area Fisheries Office:
Ph: 763-675-3301 Montrose Area Web site:
www.dnr.state.mn.us/areas/fisheries/montrose DNR Web site: www.dnr.state.mn.us Email: joe.stewig@state.mn.us
Northern Pike
81 86 89 93 97 01 05 090
3
6
9
12
15
18
21
11.49.9 10.1
9.4
12.313.8
16.818.0
Survey Year
Fis
h/G
illn
et
VS
93 97 01 05 090
3
6
9
12
0
20
40
60
80
100
120
8.5
9.5
11.2
8.1
6.9
52.4
67.8
84.3
10094.3
Survey Year
WA
E/G
illn
et
LM
B/H
ou
r
Summary
YEP catch decreasing; poor size structure
BLG abundant and slow growing; poor size structure
Improved water quality
Size Structure
93 97 01 05 090
20
40
60
80
100
47
92
40
65
38
8
49
3224
11
PSD RSD-15 PSD Goal RSD-15 Goal
Survey Year
Siz
e D
istr
ibu
tion
Size Structure
81 86 89 93 97 01 05 090
20
40
60
80
100
10
22
13
40 0
25
0
PSD PSD Goal
Survey Year
Siz
e D
istr
ibu
tion
Size Structure
81 86 89 93 97 01 05 090
10
20
30
40
50
60
70
80
90
26
36
4851
78
55
81
45
0 1 0 1 0 0 0 0
PSD RSD-8 PSD Goal RSD-8 Goal
Survey Year
Siz
e D
istr
ibu
tion
Northern Pike
Walleye
Year RSD20 RSD24 RSD27 Avg TL
1998 55 24 6 21.0”
2003 54 27 12 21.1”
2007 57 27 8 21.1”
2012 56 27 4 21.0”
Summary
Summary
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