Fisheries Lake Survey

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Name: Heart

Nearest Town: Mallard
Primary County: Clearwater
Survey Date: 07/01/2013
Inventory Number: 15005800

Public Access Information

Ownership Type Description


Lake Characteristics

Lake Area (acres): 224.49
Littoral Area (acres): 54
Maximum Depth (ft): 55
Water Clarity (ft): 19.5

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


Did you know? Fishing piers are installed on lakes to provide opportunities for shore fishing.

Fish Sampled for the 2013 Survey Year

Species

Gear Used

Number of fish per net

Average Fish Weight (lbs)

Normal Range (lbs)

Caught

Normal Range

Black Crappie Trap net 0.33 0.5 - 2.2 0.46 0.3 - 0.5
Gill net 2.33 0.3 - 1.7 0.32 0.2 - 0.5
Bluegill Trap net 10.22 7.7 - 43.4 0.13 0.1 - 0.2
Gill net 21.67 N/A 0.30 N/A
Hybrid Sunfish Trap net 1.44 N/A 0.27 N/A
Gill net 1.17 N/A 0.48 N/A
Largemouth Bass Trap net 1.22 0.4 - 1.5 0.53 0.2 - 0.7
Gill net 5.50 0.5 - 1.7 0.80 0.5 - 1.2
Northern Pike Trap net 0.56 N/A 3.22 N/A
Gill net 7.00 2.2 - 8.7 1.92 1.5 - 3.2
Pumpkinseed Trap net 0.22 1.4 - 5.9 0.09 0.1 - 0.2
Gill net 0.67 N/A 0.30 N/A
Rock Bass Trap net 1.11 0.8 - 3.7 0.29 0.2 - 0.4
Gill net 5.83 0.7 - 4.4 0.35 0.2 - 0.4
White Sucker Gill net 0.67 0.5 - 2.0 2.48 1.6 - 2.6
Yellow Perch Trap net 0.44 0.4 - 2.3 0.17 0.1 - 0.2
Gill net 0.33 1.5 - 13.8 0.17 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 2013 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 3 10 2 2 0 0 0 0 17
bluegill 69 148 4 0 0 0 0 0 222
hybrid sunfish 6 14 0 0 0 0 0 0 20
largemouth bass 0 17 11 14 2 0 0 0 44
northern pike 0 0 0 1 28 11 5 2 47
pumpkinseed 2 4 0 0 0 0 0 0 6
rock bass 10 31 4 0 0 0 0 0 45
white sucker 0 0 0 0 4 0 0 0 4
yellow perch 2 3 1 0 0 0 0 0 6


For the record, the largest Rainbow Trout taken in Minnesota weighed 17 lbs., 6 oz. and was caught:

    Where: Knife River, Lake County
    When: 1/19/74
    Statistics: 36.9" length

Fish Consumption Guidelines

No fish consumption guidelines are available for this lake. For more information, see the "Fish Consumption Advice" pages at the Minnesota Department of Health.


Status of the Fishery (as of 07/01/2013)

Update 06/17/2014; There has been a change in public access status. The public access was leased by Clearwater County from the White Earth Reservation. That lease expired and has not been renewed.

Heart Lake is a 206-acre lake with a maximum depth of 55 feet located 8 miles northwest of Itasca State Park in southern Clearwater County. The shoreline of Heart Lake is mostly undeveloped with a small number of lakeshore cabins. Water quality measurements taken in July 2013 documented excellent water quality, with good oxygen levels for fish down to a depth of 26 feet and a Secchi disc reading of 19.5 feet (very clear water). No fisheries management work has been conducted on Heart Lake since 1989 due to issues regarding the public water access site on the lake; however, public access was recently affirmed and fisheries management work resumed in 2013. The 2013 fish population assessment documented bluegill, black crappie, largemouth bass and northern pike as the primary species present in Heart Lake. The 2013 bluegill catch rate of 10.22 fish per trap net (10.22/TN) is within the typical range for Lake Class 23 lakes. Bluegill captured in trap nets had an average size of 5.1 inches in length. Gill nets captured larger bluegill than trap nets, with a mean length of 7.0 inches and fish up to 9.7 inches in length. Fourteen percent of gill net-caught bluegill were greater than 8 inches in length. Growth rates for bluegill in Heart Lake were below average, with fish reaching 4.1 inches in length at age-5 compared to 5.1 inches for other Lake Class 23 lakes in the area. Bluegill up to age-15 were identified in the assessment, which is unusually long-lived for the species. Black crappie catch rates were low for trap nets (0.33/TN) but above the normal range for gill nets (2.33 fish/gill net). As with bluegill, gill nets captured larger black crappie than trap nets. Gill nets are set deeper on the outside edges of weed lines, while trap nets are set along the shoreline in shallower water. Black crappie up to 12.7 inches in length were captured; however, most of the black crappie catch consisted of age-2 and age-3 fish resulting in an average length of 7.0 inches. Northern pike were captured at a rate of 7 fish per gill net, which is near the upper end of the typical catch rate for Lake Class 23 lakes. Northern pike up to 37 inches in length were captured in the assessment, with an average size of 20.6 inches and 1.92 lbs. Nineteen percent of northern pike captured in the assessment were greater than 24 inches in length. An electrofishing assessment targeting largemouth bass was conducted as part of the 2013 assessment. The electrofishing catch rate of 79.6 bass/hour indicates a healthy bass population. Largemouth bass up to 17.6 inches in length were captured. Forty-one percent of bass captured exceeded 12 inches in length. Growth rates for largemouth bass were comparable to averages for other Lake Class 23 lakes in the area, although growth rates for this lake class are the slowest among all lake types found in the Bemidji area. Age-5 largemouth bass from Heart Lake averaged 10.7 inches in length. Other species documented in the 2013 assessment were hybrid sunfish, pumpkinseed, rock bass, white sucker and yellow perch.


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 C0214,C0302 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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