Fisheries Lake Survey

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Name: Toad (Big Toad)

Nearest Town: Osage
Primary County: Becker
Survey Date: 08/15/2011
Inventory Number: 03010700
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Public Access Information

Ownership Type Description
Private Property Other Northern Inn access on north end of lake.
DNR Concrete South shore off CSAH #124.


Lake Characteristics

Lake Area (acres): 1716.17
Littoral Area (acres): 561
Maximum Depth (ft): 29
Water Clarity (ft): 5.3 (3.5-7)

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


Did you know? Spawning habitat improvements can enhance naturally reproducing populations of fish species such as walleye and northern pike.

Fish Sampled for the 2011 Survey Year

Species

Gear Used

Number of fish per net

Average Fish Weight (lbs)

Normal Range (lbs)

Caught

Normal Range

Black Bullhead Gill net 0.25 0.6 - 6.8 0.73 0.5 - 1.0
Black Crappie Trap net 1.42 0.4 - 2.3 0.84 0.3 - 0.6
Gill net 1.08 0.4 - 2.7 0.56 0.3 - 0.6
Bluegill Trap net 9.50 4.4 - 49.0 0.20 0.1 - 0.2
Gill net 10.25 N/A 0.23 N/A
Bowfin (dogfish) Trap net 1.67 0.3 - 1.1 4.79 3.7 - 5.1
Gill net 0.58 0.1 - 0.4 4.14 3.1 - 4.6
Brown Bullhead Trap net 2.25 0.3 - 1.6 1.14 0.7 - 1.1
Gill net 3.17 0.3 - 1.8 1.24 0.7 - 1.2
Largemouth Bass Trap net 1.67 0.3 - 1.3 0.68 0.2 - 0.8
Gill net 3.67 0.3 - 1.4 0.88 0.5 - 1.2
Northern Pike Trap net 1.33 N/A 2.15 N/A
Gill net 8.58 2.8 - 9.0 1.82 1.6 - 2.8
Pumpkinseed Trap net 2.08 1.8 - 7.8 0.20 0.1 - 0.3
Gill net 2.42 N/A 0.22 N/A
Rock Bass Trap net 1.08 0.5 - 2.5 0.41 0.3 - 0.5
Gill net 4.75 0.6 - 3.9 0.39 0.3 - 0.5
Walleye Trap net 0.33 0.2 - 0.8 5.58 1.0 - 2.7
Gill net 16.25 3.3 - 8.8 1.80 1.2 - 2.1
White Sucker Trap net 0.17 0.2 - 1.1 4.58 1.8 - 3.0
Gill net 1.67 0.9 - 4.0 2.74 1.6 - 2.4
Yellow Bullhead Trap net 5.50 1.2 - 5.2 0.99 0.6 - 0.9
Gill net 16.08 1.2 - 10.9 0.77 0.6 - 0.9
Yellow Perch Trap net 0.17 0.6 - 3.5 0.13 0.1 - 0.2
Gill net 0.75 7.0 - 46.3 0.09 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 2011 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 0 3 0 0 0 0 0 3
black crappie 8 1 10 11 0 0 0 0 30
bluegill 104 131 2 0 0 0 0 0 237
bowfin (dogfish) 0 0 0 1 1 17 8 0 27
brown bullhead 0 1 13 49 2 0 0 0 65
largemouth bass 13 13 24 8 5 1 0 0 64
northern pike 0 0 0 0 57 53 7 2 119
pumpkinseed 25 29 0 0 0 0 0 0 54
rock bass 5 46 19 0 0 0 0 0 70
walleye 0 0 1 91 65 35 7 0 199
white sucker 0 0 0 3 15 4 0 0 22
yellow bullhead 0 12 157 89 1 0 0 0 259
yellow perch 6 5 0 0 0 0 0 0 11


For the record, the largest Largemouth Bass taken in Minnesota weighed 8 lbs., 15 oz. and was caught:

    Where: Auburn Lake, Carver County
    When: 10/22/94
    Statistics: 23.5" length, 18" girth

Fish Stocking Activity

Fish Stocked by Species for the Last Ten Years

Year Species Size Number Pounds
2013 Walleye fingerlings 18,130 561.0
2011 Walleye fingerlings 13,753 621.0
2009 Walleye1 fingerlings 2,621 168.0
  Walleye fingerlings 5,560 393.0
2007 Walleye fingerlings 6,802 561.0
  Walleye yearlings 140 70.0
2005 Walleye fingerlings 5,444 373.0

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
TOAD
Becker Co., 03010700
Bluegill Sunfish All sizes        
Bullhead   All sizes     Mercury
Carp   All sizes     Mercury
Crappie   All sizes     Mercury
Largemouth Bass   All sizes     Mercury
Northern Pike   All sizes     Mercury
Walleye   shorter than 20" 20" or longer   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
TOAD
Becker Co., 03010700
Bluegill Sunfish All sizes        
Bullhead All sizes        
Carp All sizes        
Crappie All sizes        
Largemouth Bass All sizes        
Northern Pike All sizes        
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 08/15/2011)

Big Toad is locally known as a good "all around" fishing lake. Angling for walleye, northern pike, largemouth bass, sunfish, and crappies can all be good at times during an average year. Since the 1980's, the most notable changes in test net catches include 1)very low yellow perch numbers, 2)very low black bullhead numbers, and 3)increasing numbers of black crappie. Despite low net catches of yellow perch, walleye stomachs were often filled with young perch. In most lakes similar to Toad, perch are the primary forage for northern pike, walleye, and even largemouth bass. Growth rates for these predator species have not yet suffered markedly and the larger fish have likely switched to an alternate prey fish (possibly bullhead).

Catch rates of walleye have historically bounced between 10 and 20 per net. In 2006, catches were near the lower end of this range. However, walleye catch rates rebounded in 2011 to 16.3 per set, which was a little higher than the lake's historic average. There is some natural reproduction of walleyes in Toad and regular fingerling stocking supplements this population.

The diverse fish community in Big Toad reflected reasonably good water quality. There were very few black bullheads found. There were decent numbers of walleye averaging over 16 inches in length. There was a modest population of black crappies averaging well over a half pound each. There were large numbers of small pike. Angler harvest likely removes a high percentage of "keeper" pike as fast as they approach acceptable sizes. In addition, there were good numbers of largemouth bass and several other fish species found. Natural reproduction sustains the fisheries of all of these species except walleyes, which are stocked regularly to supplement reproduction.

In summary, the fish community and water quality characteristics of Big Toad were in a relatively healthy condition. However, increasing pressures for shoreline development will continue. Water quality characteristics place Toad Lake on the border between mesotrophy and eutrophy. It behooves all shoreline and watershed landowners to practice good stewardship and "best management practices" since unchecked and improper shoreland changes have a history of degrading water quality, fish populations, and property values. Two excellent sources of shoreline landscaping information are available from the Minnesota Bookstore. These include the document "Lakescaping for Wildlife and Water Quality" and the computer CD "Restore Your Shore."


For more information on this lake, contact:

Area Fisheries Supervisor
14583 Cty Hwy 19
Detroit Lakes, MN 56501-7121
Phone: (218) 846-8340
Internet: Detroit Lakes Fisheries
E-Mail: DetroitLakes.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 B0013 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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