Fisheries Lake Survey

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Name: Tetonka

Nearest Town: Waterville
Primary County: Le Sueur
Survey Date: 07/21/2014
Inventory Number: 40003100
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Public Access Information

Ownership Type Description
City Asphalt Cannon River City Launch
DNR Asphalt DNR Public Access inside Antl Bay


Lake Characteristics

Lake Area (acres): 1357.8
Littoral Area (acres): 548
Maximum Depth (ft): 35
Water Clarity (ft): 7.1 (5.7-8.5)

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


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 2014 Survey Year

Species

Gear Used

Number of fish per net

Average Fish Weight (lbs)

Normal Range (lbs)

Caught

Normal Range

Bigmouth Buffalo Trap net 0.33 0.2 - 0.8 4.60 2.5 - 5.7
Black Bullhead Trap net 0.42 0.7 - 25.7 1.30 0.3 - 0.6
Gill net 0.67 2.5 - 45.0 1.39 0.3 - 0.7
Black Crappie Trap net 0.92 1.8 - 21.2 0.56 0.2 - 0.3
Gill net 3.25 2.5 - 16.5 0.20 0.1 - 0.3
Bluegill Trap net 1.08 7.5 - 62.5 0.34 0.1 - 0.3
Gill net 0.08 N/A 0.48 N/A
Bowfin (dogfish) Trap net 3.92 0.4 - 1.3 3.83 2.3 - 4.1
Gill net 0.25 0.2 - 0.8 3.91 2.4 - 4.2
Channel Catfish Trap net 0.08 N/A 2.70 N/A
Gill net 0.58 N/A 2.72 N/A
Common Carp Trap net 2.50 0.4 - 2.0 6.68 2.6 - 6.0
Freshwater Drum Trap net 9.58 0.5 - 4.2 1.62 0.4 - 1.2
Gill net 3.92 4.0 - 32.3 1.30 0.3 - 1.1
Largemouth Bass Trap net 0.08 0.2 - 0.7 4.41 0.2 - 0.9
Northern Pike Trap net 0.33 N/A 3.46 N/A
Gill net 1.17 1.5 - 7.3 5.54 2.0 - 3.5
Walleye Trap net 0.42 0.3 - 1.2 2.99 0.8 - 2.8
Gill net 1.83 1.2 - 6.3 1.06 1.2 - 2.7
White Bass Trap net 0.50 0.2 - 0.9 1.49 0.5 - 1.5
Gill net 1.25 0.3 - 3.8 1.12 N/A
White Sucker Gill net 0.75 0.4 - 2.2 2.79 1.5 - 2.4
Yellow Bullhead Trap net 0.25 0.9 - 5.7 1.10 0.5 - 0.8
Yellow Perch Trap net 0.25 0.3 - 1.7 0.15 0.1 - 0.2
Gill net 9.08 2.0 - 27.9 0.24 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
bigmouth buffalo 0 0 0 0 2 2 0 0 4
black bullhead 0 0 1 12 0 0 0 0 13
black crappie 29 3 16 0 0 0 0 0 48
bluegill 3 11 0 0 0 0 0 0 14
bowfin (dogfish) 0 0 0 0 4 42 4 0 50
channel catfish 0 0 0 0 8 0 0 0 8
common carp 0 0 0 0 1 24 4 1 30
freshwater drum 0 6 1 83 72 0 0 0 162
largemouth bass 0 0 0 0 1 0 0 0 1
northern pike 0 0 0 0 1 2 10 4 17
walleye 0 6 2 6 8 2 1 0 25
white bass 0 1 2 15 3 0 0 0 21
white sucker 0 0 0 0 9 0 0 0 9
yellow bullhead 0 0 0 3 0 0 0 0 3
yellow perch 58 28 18 0 0 0 0 0 104


For the record, the largest Pumpkinseed taken in Minnesota weighed 1 lb., 5.6 oz. and was caught:

    Where: Leech Lake, Cass County
    When: 6/6/99
    Statistics: 10.1" length, 12 1/8" girth

Fish Stocking Activity

Fish Stocked by Species for the Last Ten Years

Year Species Size Number Pounds
2014 walleye fry 818,160 8.0
2013 Northern Pike fry 49,329 1.0
  Walleye fry 816,777 8.0
2012 Walleye fry 905,520 8.8
2011 Northern Pike fry 44,876 0.8
2010 Channel Catfish fingerlings 3,606 86.5
  Northern Pike fry 58,422 0.9
  Walleye fry 872,912 8.0
  Walleye fry 218,228 2.0
2009 Channel Catfish fingerlings 11,828 164.5
  Walleye fry 828,671 8.2
2008 Channel Catfish fingerlings 18,119 166.2
  Walleye fry 820,000 8.0
2007 Channel Catfish fingerlings 121,325 986.9
2006 Walleye fry 849,220 8.5
2005 Channel Catfish fingerlings 57,491 450.3
  Walleye fry 818,160 8.0

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
TETONKA
Le Sueur Co., 40003100
Bluegill Sunfish   All sizes     Mercury
Bullhead   All sizes     Mercury
Carp All sizes        
Crappie   All sizes     Mercury
Northern Pike     All sizes   Mercury
Walleye     All sizes   Mercury
White Bass     All sizes   Mercury
White Sucker   All sizes     Mercury
Yellow Perch   All sizes     Mercury

General Population

LAKE NAME
County, DOWID
Species Meal Advice Contaminants
Unrestricted 1 meal/week 1 meal/month Do not eat
TETONKA
Le Sueur Co., 40003100
Bluegill Sunfish All sizes        
Bullhead All sizes        
Carp All sizes        
Crappie All sizes        
Northern Pike   All sizes     Mercury
Walleye   All sizes     Mercury
White Bass   All sizes     Mercury
White Sucker   All sizes     Mercury
Yellow Perch 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 07/21/2014)

Introduction Tetonka Lake is a 1,336 acre lake located in Le Sueur County near the town of Waterville. A DNR-owned public access located on the west side of Antl Bay off Le Sueur County Road 14. There is also a city-owned access on the Cannon River within the town of Waterville off 1st Street near the blue water tower. Tetonka Lake has a mean depth of 19 feet and a maximum depth of 35 feet. Based on limnological variables, Tetonka Lake is placed in lake class 24. Other lakes in this lake class include Madison (Blue Earth County), Mazaska (Rice County), and Reeds (Waseca County). Tetonka Lake is managed primarily for walleye and channel catfish and secondarily for northern pike. Walleye fry have been stocked in Tetonka Lake three out of four years since 2004, while northern pike and channel catfish are stocked periodically. Tetonka Lake was surveyed the week of July 21, 2014 as part of a regular monitoring program conducted by the Minnesota DNR. This survey was intended to assess the fish community by deploying trap nets and gill nets, as well as recording water quality parameters.

Walleye The walleye gill net catch rate in the 2014 survey was 1.8 fish/net, which was just above the long-term average of 1.5 fish/gill net in Tetonka Lake. Walleye abundance has remained relatively stable over the past 25 years, ranging from 1.2 to 2.6 fish/net since 1989. The total length of walleye from gill nets ranged from 7.0 to 24.0 and averaged about 13.0 inches, indicating a relatively small size structure. Walleye growth in Tetonka Lake appears to be slightly slower than similar lakes in the area, which may play a role in the small size structure. Numerous year classes were represented in this survey, as Tetonka Lake is stocked with walleye regularly (three of every four years). Natural reproduction of walleye is also suspected to occur, at least to some degree, throughout the Cannon River chain of lakes.

Yellow perch Yellow perch were the most abundant fish species observed in the gill nets, averaging 9.1 fish/net. This was above the long-term average for yellow perch catch rates in Tetonka Lake (6.6 fish/net). Yellow perch gill net catch rates in Tetonka Lake have remained relatively stable since 1981. The length of yellow perch in 2014 ranged from 5.0 to 10.5 inches and averaged 7.0 inches, indicating a relatively small size structure of yellow perch. Although some yellow perch angling opportunities exist in Tetonka Lake, anecdotal reports indicate mostly small fish are caught.

Bluegill Bluegill abundances were low during the 2014 survey. Bluegill catch rates were the lowest in about 30 years at 1.1 fish/trap net. Bluegill lengths ranged from 3.2 to 7.9 inches, with most fish measuring over 7 inches. Although bluegill catch rates were low during this survey, the numbers may not necessarily reflect actual population levels. Similar to angling, abiotic variables can affect fish patterns and behavior, potentially affecting their susceptibility to net catch. For example, bluegill may have inhabited deeper water at the time of this survey, thus greatly reducing their susceptibility to near shore trap net catch.

Black crappie Black crappie abundance was low during the 2014 survey, with gill nets yielding only 3.3 fish/net. This catch rate was similar to the survey conducted in 2009, which yielded 3.1 fish/gill net. Trap net catch rates of black crappie were also low, averaging only 0.9 fish/net. Black crappie lengths from both net types ranged from 4.0 to 11.0 inches, averaging 6.7 inches. Anglers often target black crappie in Tetonka Lake, especially during ice covered periods. However, anecdotal reports indicate most fish that are caught are 10 inches or less in total length.

Northern pike The northern pike catch rate in the 2014 survey was 1.2 fish/gill net, which closely represents the long-term average for Tetonka Lake (1.1 fish/gill net). Although the relative abundance of northern pike in Tetonka Lake is below average compared to similar lakes in the area, the average length was about 29.0 inches and ranged from 24.0 to 34.0 inches, indicating a good size structure of northern pike in Tetonka Lake for angling and spearing. Northern pike fry were stocked recently in Tetonka Lake in 2010, 2011, and 2013.

Channel catfish Channel catfish are present in Tetonka Lake, although in low abundance. The gill net catch rate in 2014 was 0.6 fish/net, while the trap nets collected only 0.1 fish/net. All channel catfish collected in the 2014 survey ranged from 18.0 to 20.0 inches in total length. Although channel catfish from this survey were not aged, the size structure suggests that only one year class was sampled in 2014. A surplus stocking plan exists for Tetonka Lake and channel catfish were last stocked in 2010.

White bass White bass are also present in Tetonka Lake, apparently as a result of natural reproduction since they are not stocked. Gill nets yielded 1.3 white bass/net in the 2014 survey. White bass abundance in Tetonka Lake has varied throughout the sampling history, ranging from 6.0 fish/net in 1989 to 0.6 fish/net in 1994. This variability is likely affected by spawning success, or lack thereof, from year to year. The total length of white bass from gill nets in this survey ranged from 7.3 to 15.2 inches and averaged 13.1 inches. White bass in Tetonka Lake offer a quality fishing opportunity for anglers looking for hard fighting fish and good table fare.

Other species Although only one largemouth bass (19.3 inches) was collected in this survey, both largemouth and smallmouth bass are present in Tetonka Lake. Since largemouth and smallmouth bass are not effectively sampled in gill and trap nets, an electrofishing survey is scheduled for spring 2015 to assess the populations. Other fish collected in this survey included black and yellow bullheads, freshwater drum, bowfin, white sucker, common carp, and bigmouth buffalo.

Anglers can play an important role in maintaining or improving a fish population by practicing selective harvest. Selective harvest allows for the harvest of smaller fish for consumption, while encouraging the release of medium to large fish that may contribute to natural recruitment. This practice helps maintain balance in the fish community and provides anglers the opportunity to catch more and larger fish in the future. Additionally, smaller fish often taste better and have fewer contaminants than larger, older fish from the same water body.

Shoreline property owners also play an important role in the overall health of an aquatic ecosystem, including the fish population. Natural shorelines, including vegetation, woody debris, and bottom substrates, provide valuable habitat for fish and wildlife, help maintain water quality, and reduce bank erosion. By leaving natural shorelines unaltered or restoring them to natural conditions, shoreline property owners are doing their part to maintain or improve a healthy ecosystem in the lake and protect the resource for future generations.


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 B0201 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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