Fisheries Lake Survey

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Name: Myrtle

Nearest Town: Orr
Primary County: St. Louis
Survey Date: 06/18/2012
Inventory Number: 69074900
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Public Access Information

Ownership Type Description
DNR Concrete East end of lake.


Lake Characteristics

Lake Area (acres): 876.43
Littoral Area (acres): 862
Maximum Depth (ft): 20
Water Clarity (ft): 8.8 (8.25-9.3)

Dominant Bottom Substrate: N/A
Abundance of Aquatic Plants: N/A
Maximum Depth of Plant Growth (ft): 7.6 (.5-12)


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.

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 Bullhead Trap net 0.09 0.9 - 16.9 1.21 0.3 - 0.5
Gill net 0.11 2.6 - 124.4 0.38 0.3 - 0.6
Black Crappie Trap net 10.09 0.3 - 4.6 0.12 0.3 - 0.7
Gill net 24.33 0.4 - 4.0 0.06 0.1 - 0.5
Bluegill Trap net 4.55 0.9 - 8.3 0.11 0.1 - 0.4
Gill net 2.67 N/A 0.22 N/A
Brown Bullhead Trap net 0.18 0.6 - 24.4 1.15 0.4 - 0.8
Golden Shiner Gill net 0.78 0.3 - 4.0 0.08 0.1 - 0.1
Largemouth Bass Gill net 0.67 0.3 - 0.6 0.63 0.3 - 1.3
Northern Pike Trap net 0.36 N/A 1.95 N/A
Gill net 10.00 2.0 - 6.0 2.61 1.3 - 2.5
Pumpkinseed Trap net 0.91 0.4 - 3.6 0.15 0.1 - 0.2
Rock Bass Trap net 0.55 0.2 - 1.1 0.17 0.2 - 0.4
Gill net 0.22 0.2 - 1.6 0.42 0.3 - 0.5
Smallmouth Bass Gill net 0.44 0.2 - 1.8 1.37 0.9 - 2.0
Walleye Gill net 6.00 3.2 - 13.7 1.38 0.8 - 1.3
White Sucker Trap net 0.27 0.3 - 2.1 4.40 1.6 - 2.8
Gill net 5.11 3.0 - 11.0 2.53 1.4 - 2.4
Yellow Perch Trap net 0.18 0.4 - 1.8 0.58 0.1 - 0.4
Gill net 14.67 4.7 - 15.8 0.15 0.2 - 0.3
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 bullhead 0 1 0 1 0 0 0 0 2
black crappie 308 11 8 3 0 0 0 0 330
bluegill 54 18 2 0 0 0 0 0 74
brown bullhead 0 0 1 1 0 0 0 0 2
golden shiner 5 2 0 0 0 0 0 0 7
largemouth bass 2 2 0 2 0 0 0 0 6
northern pike 0 0 2 2 25 51 8 6 94
pumpkinseed 7 3 0 0 0 0 0 0 10
rock bass 4 4 0 0 0 0 0 0 8
smallmouth bass 0 0 0 4 0 0 0 0 4
walleye 0 2 6 21 23 2 0 0 54
white sucker 0 5 4 6 21 13 0 0 49
yellow perch 76 45 13 0 0 0 0 0 134


For the record, the largest Quillback taken in Minnesota weighed 6 lbs., 14.4 oz. and was caught:

    Where: Mississippi River, Ramsey County
    When: 4/6/91
    Statistics: 23" length, 18" girth

Fish Stocking Activity

Fish Stocked by Species for the Last Ten Years

Year Species Size Number Pounds
2013 Walleye2 fingerlings 31,365 1,723.0
2011 Walleye2 fingerlings 33,566 1,724.0
2009 Walleye1 fingerlings 31,345 1,721.2
2007 Walleye1 fingerlings 43,075 1,723.0
2005 Walleye1 fingerlings 31,258 1,505.4

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

LAKE NAME
County, DOWID
Species Meal Advice Contaminants
Unrestricted 1 meal/week 1 meal/month Do not eat
MYRTLE
St. Louis Co., 69074900
Crappie   All sizes     Mercury
Northern Pike     All sizes   Mercury
Walleye     All sizes   Mercury
White Sucker   All sizes     Mercury

General Population

LAKE NAME
County, DOWID
Species Meal Advice Contaminants
Unrestricted 1 meal/week 1 meal/month Do not eat
MYRTLE
St. Louis Co., 69074900
Crappie All sizes        
Northern Pike   All sizes     Mercury
Walleye   All sizes     Mercury
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 06/18/2012)

Myrtle Lake is located approximately seven miles east of Orr, Minnesota on rolling terrain within a mixed deciduous-coniferous forest. There is a state owned public access on the east end of the lake on County Road 23. Myrtle is a Class 16 lake with a total surface area of 889 acres. The maximum depth is 20 feet; however, 97% of the lake is 15 feet deep or less. Myrtle Lake has diverse fish and aquatic plant communities.

Black crappie abundance was well above the expected range for this lake type. However, black crappie abundance has often been higher, especially in the mid-1980's. In 2012, seven year-classes were present and age ranged from 2-10 years. The majority of the fish in the sample were young; age-2 fish represented 89% of the sample. Length in trap nets ranged from 3.7-12.4 inches and the mean was 5.2. Due to the many young fish in the sample, the mean weight of black crappies captured was well below the expected range found in this lake type.

Bluegill trap-net abundance was within the expected range for this lake type. Five year-classes were present and age ranged from 2-8 years. Many of fish in the sample were young; age-2 fish represented 80% of the sample. Total length in trap nets ranged from 3.2-9.2 inches and the mean was 4.8. Due to the many young fish in the sample, the mean weight of bluegill captured was slightly below the expected range found in this lake type.

Night electrofishing was used to sample largemouth and smallmouth bass on May 30-31, 2012. A total of 218 bass were captured.

Largemouth bass were captured at a rate of 66.65 per hour of on-time, which was the highest level ever recorded for any lake in the International Falls Management Area. Ten year-classes were sampled and age ranged from 2-11 years. Age-2 fish represented 74% of the sample. Length ranged from 4.4 to 17.8 inches and the mean was 8.2.

Smallmouth bass were captured at a rate of 84.71 per hour of on-time, which falls in the middle of the range for lakes in the International Falls Management Area. Seven year-classes were sampled and age ranged from 2-10 years. When combined, ages 2 and 3 represented 84% of the sample. Length ranged from 3.7-17.5 inches and the mean was 7.9 inches.

Northern pike abundance was well above the expected range for this lake type. Several year-classes were well represented. Length ranged from 10.5 to 37.2 inches and the mean was 21.9. The mean weight of northern pike captured was above the expected range found in similar lakes.

Walleye stocking records for Myrtle Lake date back to 1945 when fry were stocked. Walleye fingerlings were stocked on three occasions from 1958 to 1965. In 1967, a change back to fry was made and periodic stocking of fry continued through 1992, except in January 1984 when 532 adult walleyes (0.75lb each) were stocked. Generally, fry stocking has been unsuccessful and natural reproduction has been unable to maintain abundance above or near the middle of the expected range. Thus, starting in 2003, fingerling stocking resumed with a plan to stock every other year at an accelerated rate.

Success of stocking is dictated and confounded by many factors. It would be irresponsible to try to evaluate the success of the new stocking protocol for Myrtle Lake with too few data points. So, our goal for the first several investigations after the implementation of the new stocking protocol was to begin collecting information that when used with future investigations, will enable us to evaluate the stocking program for Myrtle Lake.

Recent investigations indicate that walleye abundance is higher than during the previous two decades, including a new record high observed in 2007. However, abundance still slightly below what is generally observed in similar lakes. Seven year-classes were present and age ranged from 1-8 years in 2012. The 2009 year-class represented 54% of the sample. Several year-classes were well represented and all occurred in odd numbered years which coincide with stocking. Total length ranged from 7.1-21.5 inches and the mean was 15.0. Mean weight was 1.38 pounds, which exceeded the top of the expected range.

Yellow perch abundance was near the upper end of the expected range for this lake type. Overall average size was small, but the length range included fish up to 10.9 inches; which should provide anglers with another harvest option.


For more information on this lake, contact:

Area Fisheries Supervisor
392 Hwy 11 E
International Falls, MN 56649
Phone: (218) 286-5220
Internet: International Falls Fisheries
E-Mail: InternationalFalls.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 B0368 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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