Fisheries Lake Survey

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Name: Rebecca

Nearest Town: Rockford
Primary County: Hennepin
Survey Date: 06/06/2011
Inventory Number: 27019200

Public Access Information

Ownership Type Description
County Concrete

Lake Characteristics

Lake Area (acres): 263.28
Littoral Area (acres): 138
Maximum Depth (ft): 30
Water Clarity (ft): 8

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

Did you know? Ongoing habitat improvement and maintenance work is conducted on trout streams that have publicly owned land or easements.

Fish Sampled for the 2011 Survey Year


Gear Used

Number of fish per net

Average Fish Weight (lbs)

Normal Range (lbs)


Normal Range

Black Bullhead Trap net 0.20 0.7 - 25.7 0.39 0.3 - 0.6
Black Crappie Trap net 16.00 1.8 - 21.2 0.20 0.2 - 0.3
Bluegill Trap net 260.90 7.5 - 62.5 0.17 0.1 - 0.3
Common Carp Trap net 0.80 0.4 - 2.0 5.86 2.6 - 6.0
Golden Shiner Trap net 3.20 0.2 - 0.8 0.09 0.1 - 0.1
Hybrid Sunfish Trap net 1.20 N/A 0.21 N/A
Largemouth Bass Trap net 1.70 0.2 - 0.7 0.38 0.2 - 0.9
Muskellunge Trap net 0.50 0.4 - 0.5 14.62 1.5 - 7.0
Pumpkinseed Trap net 8.90 0.7 - 4.2 0.13 0.1 - 0.2
Yellow Perch Trap net 1.50 0.3 - 1.7 0.20 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 2011 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 bullhead 0 1 1 0 0 0 0 0 2
black crappie 22 137 1 0 0 0 0 0 160
bluegill 933 1670 0 0 0 0 0 0 2609
common carp 0 1 2 0 0 1 4 0 8
golden shiner 8 24 0 0 0 0 0 0 32
hybrid sunfish 3 9 0 0 0 0 0 0 12
largemouth bass 1 7 9 0 0 0 0 0 17
muskellunge 0 0 0 0 0 0 0 5 5
pumpkinseed 70 19 0 0 0 0 0 0 89
yellow perch 1 13 1 0 0 0 0 0 15

For the record, the largest Splake taken in Minnesota weighed 13 lbs., 5.44 oz. and was caught:

    Where: Larson Lake, Itasca County
    When: 2/11/01
    Statistics: 33.5" length, 19" girth

Fish Stocking Activity

Fish Stocked by Species for the Last Ten Years

Year Species Size Number Pounds
2011 Muskellunge fingerlings 253 50.6
2009 Muskellunge fingerlings 509 149.7
2007 Muskellunge fingerlings 252 47.6
2005 Muskellunge fingerlings 507 133.4

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

County, DOWID
Species Meal Advice Contaminants
Unrestricted 1 meal/week 1 meal/month Do not eat
Hennepin Co., 27019200
Bluegill Sunfish   All sizes     Mercury
Bullhead All sizes        
Carp All sizes        
Crappie   All sizes     Mercury
Walleye     All sizes   Mercury

General Population

County, DOWID
Species Meal Advice Contaminants
Unrestricted 1 meal/week 1 meal/month Do not eat
Hennepin Co., 27019200
Bluegill Sunfish All sizes        
Bullhead All sizes        
Carp All sizes        
Crappie All sizes        
Walleye   All sizes     Mercury

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.

PCBS - Polychlorinated biphenyls
PFOS - Perfluorooctane sulfanate

Status of the Fishery (as of 06/06/2011)

Rebecca is a 254-acre lake located south of Rockford in western Hennepin County. It is entirely within the Lake Rebecca Park Reserve, operated by the Three Rivers Park District. The lake is primarily managed for muskellunge and secondarily managed for bluegill and largemouth bass. Since 1987, Lake Rebecca has been Minnesota's primary source for Leech Lake strain muskellunge eggs. While there is a 48-inch minimum size limit on muskellunge, it is important for anglers to handle these fish carefully and return them to the water quickly to ensure these fish will be able to contribute to future generations of Minnesota muskellunge.

A fish population assessment was conducted during the first week in June 2011 to evaluate the size structure and abundance of game fish species in the lake. Only trap nets were used during this assessment to limit physically damaging and physiologically stressing muskellunge.

During the June summer assessment, 5 muskellunge were sampled, ranging in length from 37.0 to 41.3 inches in length. Early every spring, muskellunge are netted for the egg-take operation. In spring 2011, 48 were netted, averaging 39.5 inches and 14.8 lbs, with the largest reaching 45.7 inches and 28.1 lbs.

Bluegill abundance is high (260.9/ trap net). Historically this has been the case as the previous 4 assessments have averaged 215.5 per net. Size structure has not changed much over the previous assessments and continues to be small. Bluegill averaged 6.1 inches long and 0.17 lbs, with the largest reaching 7.1 inches and 0.25 lbs. Thirty-six percent of bluegill sampled were between 3 and 6 inches, and the majority (64%) were between 6 and 7.1 inches (PSD = 64). Bluegill body condition was good; however there was a decrease in condition for fish over 6 inches in length. Ages ranged from 2 through 7, with the 2006 (45% of the total sampled) and 2007 (35% of the total sampled) year classes being the most abundant. Growth was slow compared to the statewide average. At age 3, bluegill averaged 4.8 inches, and at age 6 they averaged 6.6 inches.

Black crappie abundance is moderately high (16.0/ trap net). Crappie catch over the previous 4 assessments has varied from 7.2 to 25.4 per net, averaging 20.9 per net. Black crappie averaged 7.3 inches and 0.21 lbs, with the largest reaching 9.1 inches and 0.40 lbs. Size structure has improved from the previous assessment in 2005, where black crappie averaged 6.5 inches and 0.14 lbs. In 2011, 83% were between 5 and 8 inches (PSD = 16), and 16% were 8 inches or longer. Black crappie body condition was good on average but fish 5 to 8 inches were in better condition than fish 8 inches and longer. Ages ranged from 2 through 6, with most fish evenly distributed between ages 2 through 5. Growth was average until age 5, when it slowed considerably. Black crappie averaged 7.0 inches at age 3 and 8.3 inches at age 5.

Seventeen largemouth bass were collected during the assessment; however, passive sampling gears, such as trap nets, are not effective methods for collecting largemouth bass. The data presented for this species is not indicative of relative abundance or size structure. Electrofishing is the typical method for largemouth bass assessments but was not conducted during this survey. Mean size was 9.4 inches and 0.38 pounds with the largest reaching 11.9 inches and 0.68 lbs. A largemouth bass fishery is present in Lake Rebecca; however a full, accurate status of the adult population can't made based on this survey's net-based sampling.

Other species sampled in low abundance were black bullhead (0.20/net), common carp (0.80/net), golden shiner (3.20/net), hybrid sunfish (1.20/net), pumpkinseed (8.9 / net), and yellow perch (1.50/net).

An assessment of fish in the shallow, nearshore habitats was also conducted using backpack electrofishing and seining. Seven species were sampled, the two most abundant were bluegill and black crappie. Other species sampled were central mudminnow, green sunfish, hybrid sunfish, largemouth bass, and yellow perch. The purpose of the nearshore sampling is to calculate an Index of Biotic Integrity score. An Index of Biotic Integrity (IBI) is estimated based on all fish sampled in this assessment. The absence of sensitive species such as minnows and darters contribute to a low IBI score.

For more information on this lake, contact:

Area Fisheries Supervisor
7050 E Hwy 101, Suite 100
Shakopee, MN 55379
Phone: (952) 496-4141
Internet: West Metro Fisheries

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 C0957 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

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    Toll-free: (800) 652-9093