Fisheries Lake Survey

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Name: Blackduck

Nearest Town: Blackduck
Primary County: Beltrami
Survey Date: 07/10/2012
Inventory Number: 04006900
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Public Access Information

Ownership Type Description
DNR Concrete ACCESS ON THE EAST SHORE AT THE CITY PARK OFF CSA 30


Fishing Regulations:

Special and/or Experimental Fishing Regulations exist on this lake. Please refer to our online Minnesota Fishing Regulations.

Fish Health:

Disease:Heterosporis sp.Date Tested:7/25/2008Result:Positive
Source: MNDNR

Lake Characteristics

Lake Area (acres): 2686.26
Littoral Area (acres): 1374
Maximum Depth (ft): 28
Water Clarity (ft): 3.5

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


Did you know? Habitat acquisition of lands next to lakes and streams protects spawning areas and shoreline vegetation, and it increases access to fishing waters.

Fish Sampled for the 2012 Survey Year

Species

Gear Used

Number of fish per net

Average Fish Weight (lbs)

Normal Range (lbs)

Caught

Normal Range

Black Crappie Trap net 0.60 0.4 - 2.3 0.97 0.3 - 0.6
Gill net 0.07 0.4 - 2.7 0.22 0.3 - 0.6
Bluegill Trap net 0.67 4.4 - 49.0 0.13 0.1 - 0.2
Brown Bullhead Trap net 0.40 0.3 - 1.6 1.45 0.7 - 1.1
Gill net 0.07 0.3 - 1.8 2.43 0.7 - 1.2
Burbot Gill net 0.07 0.1 - 0.3 2.62 1.2 - 3.0
Freshwater Drum Trap net 0.67 0.3 - 2.4 ND 1.1 - 3.9
Gill net 2.00 2.0 - 9.4 7.82 0.2 - 0.8
Hybrid Sunfish Gill net 0.07 N/A 0.93 N/A
Lake Whitefish Gill net 0.53 0.2 - 2.7 3.14 0.3 - 3.0
Largemouth Bass Trap net 0.07 0.3 - 1.3 2.48 0.2 - 0.8
Northern Pike Trap net 1.80 N/A 2.12 N/A
Gill net 7.80 2.8 - 9.0 2.41 1.6 - 2.8
Pumpkinseed Trap net 0.93 1.8 - 7.8 0.27 0.1 - 0.3
Rock Bass Trap net 0.20 0.5 - 2.5 0.31 0.3 - 0.5
Walleye Trap net 0.47 0.2 - 0.8 2.69 1.0 - 2.7
Gill net 9.73 3.3 - 8.8 1.08 1.2 - 2.1
White Sucker Trap net 0.07 0.2 - 1.1 1.42 1.8 - 3.0
Gill net 2.80 0.9 - 4.0 2.15 1.6 - 2.4
Yellow Perch Trap net 1.73 0.6 - 3.5 0.13 0.1 - 0.2
Gill net 27.20 7.0 - 46.3 0.16 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 2012 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 0 5 0 5 0 0 0 0 10
bluegill 8 2 0 0 0 0 0 0 10
brown bullhead 0 0 0 5 2 0 0 0 7
burbot 0 0 0 0 0 1 0 0 1
freshwater drum 0 0 0 0 0 21 7 0 40
hybrid sunfish 0 0 1 0 0 0 0 0 1
lake whitefish 0 0 0 1 4 3 0 0 8
largemouth bass 0 0 0 0 1 0 0 0 1
northern pike 0 0 3 1 34 78 23 5 144
pumpkinseed 6 8 0 0 0 0 0 0 14
rock bass 1 2 0 0 0 0 0 0 3
walleye 0 34 6 64 24 24 1 0 153
white sucker 0 0 3 7 30 3 0 0 43
yellow perch 145 253 32 1 0 0 0 0 434


For the record, the largest Northern Pike taken in Minnesota weighed 45 lbs., 12 oz. and was caught:

    Where: Basswood Lake, Lake County
    When: 5/16/29

Fish Stocking Activity

Fish Stocked by Species for the Last Ten Years

Year Species Size Number Pounds
2012 Walleye fry 1,375,000 12.2
2011 Walleye fry 1,375,000 12.2
2009 Walleye fry 1,375,000 12.5
2008 Walleye fry 1,375,000 12.5
2006 Walleye fry 1,375,000 12.5
2005 Walleye fry 1,375,000 12.5

Privately Stocked Fish
* indicates privately stocked fish. Private stocking includes fish purchased by the DNR for stocking and fish purchased and stocked by private citizens and sporting groups.

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
BLACKDUCK
Beltrami Co., 04006900
Bullhead All sizes        
Lake Whitefish All sizes        
Northern Pike   All sizes     Mercury
Walleye   shorter than 21" 21" or longer   Mercury
White Sucker   All sizes     Mercury
Yellow Perch All sizes        

General Population

LAKE NAME
County, DOWID
Species Meal Advice Contaminants
Unrestricted 1 meal/week 1 meal/month Do not eat
BLACKDUCK
Beltrami Co., 04006900
Bullhead All sizes        
Lake Whitefish All sizes        
Northern Pike All sizes        
Walleye All sizes        
White Sucker All sizes        
Yellow Perch 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 07/10/2012)

Blackduck Lake is a 2,596-acre lake with a maximum depth of 28 feet. The lake is located 1 mile west of the city of Blackduck in Beltrami County. There is a DNR public water access located on the eastern shore of the lake off of County Road 30. Several resorts and a modest number of lake homes dot the shoreline. A special regulation consisting of a 5-fish bag limit for sunfish was implemented in 2006. Statewide regulations apply to all other species.

The walleye population of Blackduck Lake is maintained by fry stocking, which has been a successful management tool in producing consistent walleye fishing. The 2012 walleye catch rate (9.7 fish/gill net) marks the third consecutive assessment with catch rates better than the statewide upper quartile value of 8.8 fish/gill net for class 27 lakes. Walleye grow quickly in Blackduck Lake, usually reaching 14 inches in length sometime during their fourth growing season (age 3+). Angler harvest rates of walleye tend to be high as well, resulting in a fish population usually dominated by younger fish with lots of "eaters" produced each year. Walleye captured in the 2012 fish population assessment averaged 13.8 inches and 1.08 pounds, with fish up to 28.9 inches in length present in the sample. Walleye from the abundant 2011 year class (age-1 fish) comprised a large proportion of the sample (24%), and these fish should reach harvestable sizes by 2014. Blackduck Lake is especially popular with walleye anglers from the May fishing opener through mid-summer.

Blackduck Lake also provides good fishing opportunities for sunfish (bluegill and pumpkinseed), northern pike, and yellow perch. The lake has shown the potential to produce large bluegill in the past, and in 2006 a special sunfish regulation (5-fish bag limit) was implemented to maintain the quality size structure that was present at that time; however, in the 2012 assessment, bluegill were captured in very low numbers. The 2012 northern pike catch rate of 7.8 fish/gill net approaches the statewide third quartile value of 9.0 fish/gill net which is within the normal range for class 27 lakes. Northern pike had an average length and weight of 22.3 inches and 2.41 pounds, with fish up to 33.3 inches in length present in the sample. Yellow perch are an important forage species as well as being a popular target for anglers. The 2012 population assessment showed a decline in both perch numbers and size since the 2006 assessment, although fish up to 12 inches in length were still present in the sample. Black crappie abundance in Blackduck Lake is relatively low, but with some large individuals (greater than 12 inches in length) present in the population.


For more information on this lake, contact:

Area Fisheries Supervisor
2114 Bemidji Ave
Bemidji, MN 56601
Phone: (218) 308-2339
Internet: Bemidji Fisheries
E-Mail: Bemidji.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 B0019 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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