Fisheries Lake Survey

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Name: Serpent

Nearest Town: Crosby
Primary County: Crow Wing
Survey Date: 08/18/2014
Inventory Number: 18009000
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Public Access Information

Ownership Type Description
DNR Concrete Bay on east end of lake adjacent to Hwy. 6.
City Concrete At Serpent Park on northwest corner.


Lake Characteristics

Lake Area (acres): 1103.06
Littoral Area (acres): 338
Maximum Depth (ft): 65
Water Clarity (ft): 16.8 (13.5-20)

Dominant Bottom Substrate: N/A
Abundance of Aquatic Plants: N/A
Maximum Depth of Plant Growth (ft): N/A


Did you know? Spawning habitat improvements can enhance naturally reproducing populations of fish species such as walleye and northern pike.

Fish Sampled for the 2014 Survey Year

Species

Gear Used

Number of fish per net

Average Fish Weight (lbs)

Normal Range (lbs)

Caught

Normal Range

Black Crappie Trap net 0.45 0.5 - 2.2 0.41 0.3 - 0.5
N/A Gill net 1.58 0.3 - 1.7 0.30 0.2 - 0.5
Bluegill Trap net 7.18 7.7 - 43.4 0.11 0.1 - 0.2
N/A Gill net 7.83 N/A 0.14 N/A
Bowfin (dogfish) Trap net 0.36 0.3 - 1.0 5.26 2.6 - 4.9
N/A Gill net 0.17 0.2 - 0.3 3.31 3.0 - 5.3
Brown Bullhead Trap net 1.09 0.3 - 1.0 0.55 0.7 - 1.0
N/A Gill net 1.25 0.3 - 1.8 0.70 0.5 - 1.1
Hybrid Sunfish Trap net 0.73 N/A 0.27 N/A
N/A Gill net 0.33 N/A 0.27 N/A
Largemouth Bass Trap net 0.27 0.4 - 1.5 0.15 0.2 - 0.7
N/A Gill net 2.08 0.5 - 1.7 1.02 0.5 - 1.2
Northern Pike Trap net 0.73 N/A 2.13 N/A
N/A Gill net 9.00 2.2 - 8.7 2.06 1.5 - 3.2
Pumpkinseed Trap net 1.64 1.4 - 5.9 0.13 0.1 - 0.2
N/A Gill net 1.92 N/A 0.14 N/A
Rock Bass Trap net 2.36 0.8 - 3.7 0.32 0.2 - 0.4
N/A Gill net 10.08 0.7 - 4.4 0.39 0.2 - 0.4
Smallmouth Bass Gill net 1.33 0.2 - 1.6 2.51 0.8 - 1.8
Tullibee (cisco) Gill net 0.17 1.3 - 10.4 1.88 0.3 - 1.0
Walleye Trap net 0.36 0.2 - 0.7 1.41 0.7 - 2.8
N/A Gill net 3.58 1.0 - 5.0 2.10 1.2 - 3.0
White Sucker Trap net 0.09 0.2 - 0.7 3.10 1.0 - 2.8
N/A Gill net 0.75 0.5 - 2.0 2.22 1.6 - 2.6
Yellow Bullhead Trap net 1.55 1.0 - 5.3 0.79 0.5 - 0.9
N/A Gill net 5.67 1.0 - 6.0 0.86 0.4 - 0.7
Yellow Perch Trap net 0.36 0.4 - 2.3 0.19 0.1 - 0.2
N/A Gill net 0.92 1.5 - 13.8 0.12 0.1 - 0.2
Normal Ranges represent typical catches for lakes with similar physical and chemical characteristics.


Length of Selected Species (Trapnet, Gillnet) Sampled for the 2014 Survey Year

Species Number of fish caught in each category (inches)
0-5 6-8 9-11 12-14 15-19 20-24 25-29 30+ Total
black crappie 6 10 7 1 0 0 0 0 24
bluegill 131 38 3 0 0 0 0 0 172
bowfin (dogfish) 0 0 0 0 1 3 2 0 6
brown bullhead 0 1 24 2 0 0 0 0 27
hybrid sunfish 3 9 0 0 0 0 0 0 12
largemouth bass 1 6 7 13 1 0 0 0 28
northern pike 0 0 0 5 58 36 14 3 116
pumpkinseed 30 11 0 0 0 0 0 0 41
rock bass 26 95 26 0 0 0 0 0 147
smallmouth bass 0 1 0 2 13 0 0 0 16
tullibee (cisco) 0 1 0 0 0 1 0 0 2
walleye 0 4 4 0 28 9 2 0 47
white sucker 0 0 2 0 7 1 0 0 10
yellow bullhead 0 4 53 28 0 0 0 0 85
yellow perch 5 10 0 0 0 0 0 0 15


For the record, the largest Chinook Salmon (King) taken in Minnesota weighed 33 lbs., 4 oz. and was caught:

    Where: Poplar River, Cook County
    When: 9/23/89
    Statistics: 44.75" length, 25.75" girth

    and by

    Where: 10/12/89
    When:
    Statistics: Lake Superior, St. Louis County

Fish Stocking Activity

Fish Stocked by Species for the Last Ten Years

Year Species Size Number Pounds
2013 Walleye2 fingerlings 17,272 681.0
2011 Walleye2 fingerlings 14,017 676.0
2009 Walleye1 fingerlings 8,423 676.0
2007 Walleye1 fingerlings 10,625 676.0
2005 Walleye yearlings 1,028 257.0
  Walleye fingerlings 6,980 349.0
  Walleye adults 140 70.0

Stocking Notes
1 - indicates fish purchased and stocked by private citizens and sporting groups.
2 - indicates fish purchased by the DNR for stocking.

Stocking Fish Sizes
Fry - Newly hatched fish that are ready to be stocked usually called "swim-ups". Walleye fry are 1/3 of an inch or around 8 mm.
Fingerling - Fingerlings are one to six months old and can range from a size of one to twelve inches depending on the species. Walleye fingerlings range from three to eight inches each fall.
Yearling - Yearling fish are at least one year old. A one-year-old fish can range from three to twenty inches depending on the species. Walleye yearlings average from six to twelve inches.
Adult - Adult fish are fish that have reached maturity. Depending on the species, maturity can be reached at two years of age. Walleye reach maturity between the ages of four and six years.

Fish Consumption Guidelines

These fish consumption guidelines help people make choices about which fish to eat and how often. Following the guidelin es enables people to reduce their exposure to contaminants while still enjoying the many benefits from fish.

Pregnant Women, Women who may become pregnant and Children under age 15

LAKE NAME
County, DOWID
Species Meal Advice Contaminants
Unrestricted 1 meal/week 1 meal/month Do not eat
SERPENT
Crow Wing Co., 18009000
Bluegill Sunfish All sizes        
Largemouth Bass   All sizes     Mercury
Northern Pike   All sizes     Mercury
Walleye   All sizes     Mercury
White Sucker All sizes        

General Population

LAKE NAME
County, DOWID
Species Meal Advice Contaminants
Unrestricted 1 meal/week 1 meal/month Do not eat
SERPENT
Crow Wing Co., 18009000
Bluegill Sunfish All sizes        
Largemouth Bass All sizes        
Northern Pike   All sizes     Mercury
Walleye All sizes        
White Sucker All sizes        

DOWID - MN DNR, Division of Waters' lake ID number.

Contaminants listed were measured at levels that trigger advice to limit consumption.

Listing of consumption guidelines do not imply the fish are legal to keep, MN DNR fishing regulations should be consulted.

Dioxin
Mercury
PCBS - Polychlorinated biphenyls
PFOS - Perfluorooctane sulfanate


Status of the Fishery (as of 08/18/2014)

Serpent Lake is a 1,057 acre lake located in Crow Wing County. It spans the cities of Crosby on the west shore and Deerwood on the east. A public access is located in the Crosby city park on the west end. Another access is located just north of Deerwood on the east shore. Serpent reaches depths of 65' with 32% of the lake 15' deep or less. Water clarity was good with a secchi disk reading of 20.0'. Development is heavy along the 8.9 miles of shoreline. A 2009 survey found 31 species of aquatic plants. Protection of aquatic vegetation, especially emergent vegetation, is important for maintaining good water quality. Aquatic vegetation is critical for fish spawning areas as well as providing habitat for fish and other aquatic life.

Walleye fingerlings are stocked into Serpent in odd-numbered years. All walleyes aged were from stocked years. The walleye gillnet catch was average, when compared to similar lakes, at 3.6/net. Average size was 17.4" and 2.1lbs, with the largest measuring 26.0".

Northern pike numbers were above average at 9.0/gillnet. Average size was 20.5" and 2.1lbs. Some larger fish are present with 15% of northern pike being 24" or greater in length, the largest being 36.7". Voluntary catch and release of these larger fish will help keep a balanced northern pike population. Eight year classes were present, with 75% of the catch being from the 2011 and 2012 year classes.

Largemouth bass were sampled by a spring electrofishing survey at a rate of 154.5/hr. Average size length was 10.4", and 25% were 12" or greater. Largemouth were caught in above average numbers in gillnets at 2.1/net. Largemouth caught in gillnets averaged 11.9", with 56% measuring 12" or greater. Smallmouth bass were sampled during the spring electrofishing survey at a rate of 5.8/hr. Average length was 12.9" and 57% measured greater than 12" in length. Smallmouth were sampled in average numbers in gillnets at 1.3/net. Average length of these fish was 16.2" with 94% over 12" in length.

Black crappies were caught in average numbers at 1.6/gillnet, and 0.5/trapnet. Average length was 7.3" for gillnet caught fish, and 8.8" for trapnets. Crappies up to 13.5" were sampled. For both gears combined 38% were 8" or greater in length. Bluegill numbers were below average at 7.2/trapnet. Bluegills ran on the small side with an average length of 5.1", and only 8% over 7" in length.

No invasive species have been discovered in Serpent Lake at this time, but they are located in the area. Before and after launching lake users are required to inspect and remove any aquatic plants and animals from their watercraft and trailers as well as pull the plug and drain all water from the watercraft, including bilges, livewells and baitwells.


For more information on this lake, contact:

Area Fisheries Supervisor
1601 Minnesota Dr
Brainerd, MN 56401
Phone: (218) 203-4302
Internet: Brainerd Fisheries
E-Mail: Brainerd.Fisheries@state.mn.us

Lake maps can be obtained from:

Minnesota Bookstore
660 Olive Street
St. Paul, MN 55155
(651) 297-3000 or (800) 657-3757
To order, use B0115 for the map-id.


For general DNR Information, contact:

DNR Information Center
500 Lafayette Road
St. Paul, MN 55155-4040
TDD: (651) 296-6157 or (888) MINNDNR
Internet: www.dnr.state.mn.us
E-Mail: info.dnr@state.mn.us

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