|Nearest Town: Mankato
Primary County: Waseca
|Survey Date: 06/14/2010|
Inventory Number: 81000300
|County||Concrete||Access at Park on N. shore of lake.|
|Did you know? Spawning habitat improvements can enhance naturally reproducing populations of fish species such as walleye and northern pike.|
|Species||Number of fish per net||
Average Fish Weight (lbs)
Normal Range (lbs)
|Black Crappie||Trap net||25.44||0.8 - 4.3||0.21||0.2 - 0.5|
|Bluegill||Trap net||119.33||8.3 - 50.1||0.20||0.1 - 0.3|
|Common Carp||Trap net||0.11||0.2 - 0.8||10.12||5.9 - 7.6|
|Golden Shiner||Trap net||0.33||0.1 - 1.7||0.08||0.1 - 0.1|
|Hybrid Sunfish||Trap net||0.78||N/A||0.26||N/A|
|Pumpkinseed||Trap net||0.33||2.8 - 10.3||0.20||0.1 - 0.2|
|White Crappie||Trap net||36.67||0.2 - 1.6||0.21||0.2 - 0.2|
|Species||Number of fish caught in each category (inches)|
|For the record, the largest White Crappie taken in Minnesota weighed 3 lbs., 15 oz. and was caught: |
Statistics: 18" length, 16" girth
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.|
Saint Olaf Lake was surveyed the week of June 14th, 2010 as part of the first phase of SLICE (Sentinel Lakes in a Changing Environment) monitoring. Trap net returns were similar to 2009 results. Ice out northern pike trap netting and early season vegetation point sampling were also completed. Largemouth bass electrofishing was not completed because the boat was not operational until late summer.
Black crappie averaged 25 fish per trap net lift. Bluegills averaged 119 fish per trap net lift. White Crappie averaged 37 fish per trap net lift. All bluegill and crappie catch per unit effort values exceeded the upper quartile for class 28 lakes. St. Olaf's centrarchid panfish community is largely made up of small and characteristically stunted fish.
Other fish caught include common carp, golden shiner, hybrid sunfish, and pumpkinseed.
Beach seines and backpack electrofishing as part of Index of Biotic Integrity sampling found species captured in trap nets, as well as spottail shiner, yellow perch, northern pike and johnny darter.
Anglers can help maintain or improve the quality of fishing by practicing selective harvest. Selective harvest allows for the harvest of smaller fish for table fare, but encourages release of medium- to large-sized fish. Releasing these fish can help maintain balance in the fish community in St. Olaf Lake and provide anglers the opportunity to catch more and larger fish in the future.
Shoreline areas on the land and into the shallow water provide essential habitat for fish and wildlife that live in or near Minnesota's lakes. Overdeveloped shorelines cannot support the fish, wildlife, and clean water that are associated with natural undeveloped lakes. Shoreline habitat consists of aquatic plants, woody plants, and natural lake bottom soils.
Plants in the water and at the water's edge provide habitat, prevent erosion, and absorb excess nutrients. Shrubs, trees, and woody debris such as fallen trees or limbs provide good habitat both above and below the water and should be left in place. By leaving a buffer strip of natural vegetation along the shoreline, property owners can reduce erosion, help maintain water quality, and provide habitat and travel corridors for wildlife.
|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