Fisheries Lake Survey

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Name: St. Olaf

Nearest Town: Mankato
Primary County: Waseca
Survey Date: 06/16/2014
Inventory Number: 81000300

Public Access Information

Ownership Type Description
County Concrete Access at Park on N. shore of lake.


Lake Characteristics

Lake Area (acres): 91.2
Littoral Area (acres): 51
Maximum Depth (ft): 33
Water Clarity (ft): 4

Dominant Bottom Substrate: N/A
Abundance of Aquatic Plants: N/A
Maximum Depth of Plant Growth (ft): 7.0 (3-8.5)


Did you know? The DNR Section of Fisheries has a full-time staff of 285. There are 4 regional and 28 area fisheries offices.

Fish Sampled for the 2014 Survey Year

Species

Gear Used

Number of fish per net

Average Fish Weight (lbs)

Normal Range (lbs)

Caught

Normal Range

Black Crappie Trap net 6.67 0.8 - 4.3 0.27 0.2 - 0.5
Gill net 3.00 1.0 - 4.8 0.16 0.2 - 0.4
Bluegill Trap net 43.44 8.3 - 50.1 0.26 0.1 - 0.3
Gill net 2.67 N/A 0.11 N/A
Common Carp Trap net 0.44 0.2 - 0.8 7.38 5.9 - 7.6
Golden Shiner Gill net 0.33 0.4 - 3.6 0.13 0.1 - 0.2
Hybrid Sunfish Trap net 1.00 N/A 0.27 N/A
Northern Pike Gill net 1.33 4.8 - 12.5 2.73 1.4 - 2.5
Pumpkinseed Trap net 0.67 2.8 - 10.3 0.14 0.1 - 0.2
White Crappie Trap net 1.11 0.2 - 1.6 0.42 0.2 - 0.2
Yellow Bullhead Trap net 2.33 2.1 - 10.5 0.85 0.4 - 0.7
Yellow Perch Gill net 33.33 2.0 - 21.5 0.14 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 2014 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 66 3 0 0 0 0 0 69
bluegill 76 323 0 0 0 0 0 0 399
common carp 0 0 0 1 0 0 3 0 4
golden shiner 0 1 0 0 0 0 0 0 1
hybrid sunfish 3 6 0 0 0 0 0 0 9
northern pike 0 0 0 0 1 2 1 0 4
pumpkinseed 6 0 0 0 0 0 0 0 6
white crappie 0 1 9 0 0 0 0 0 10
yellow bullhead 0 0 14 7 0 0 0 0 21
yellow perch 7 91 0 0 0 0 0 0 98


For the record, the largest Channel Catfish taken in Minnesota weighed 38 lbs. and was caught:

    Where: Mississippi River, North Minneapolis
    When: 1975
    Statistics: 44" length

Fish Stocking Activity

Fish Stocked by Species for the Last Ten Years

Year Species Size Number Pounds
2014 northern pike fry 30,145 0.6
2013 Northern Pike fry 24,664 1.0
2011 Northern Pike fry 22,572 0.4
2010 Northern Pike fry 29,211 0.5
2009 Northern Pike fry 27,073 0.5
2005 Northern Pike fry 25,890 0.9

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

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 06/16/2014)


For more information on this lake, contact:

Area Fisheries Supervisor
PO Box 86
50317 Fish Hatchery Rd
Waterville, MN 56096-0086
Phone: (507) 362-4223
Internet: Waterville Fisheries
E-Mail: Waterville.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 C0758 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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