|Nearest Town: Rockford
Primary County: Hennepin
|Survey Date: 06/06/2011|
Inventory Number: 27019200
|Did you know? MinnAqua Fishing: Get in the Habitat! has a Minnesota-base activity guide for teachers, scout and 4-H leaders, youth leaders, outdoor sports groups, or anyone interested in teaching others about habitat, stewardship and fishing.|
|Species||Number of fish per net||
Average Fish Weight (lbs)
Normal Range (lbs)
|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|
|Species||Number of fish caught in each category (inches)|
|For the record, the largest Coho Salmon taken in Minnesota weighed 10 lbs., 6.5 oz. and was caught: |
Statistics: 27.3" length
Fish Stocked by Species for the Last Ten Years
|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.|
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:||Lake maps can be obtained from:|
For general DNR Information, contact:
DNR Information Center
500 Lafayette Road
St. Paul, MN 55155-4040
TDD: (651) 296-6157 or (888) MINNDNR
Turn in Poachers (TIP):
Toll-free: (800) 652-9093