Fisheries Lake Survey

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Name: Chub

Nearest Town: Carlton
Primary County: Carlton
Survey Date: 08/31/2009
Inventory Number: 09000800
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Public Access Information

Ownership Type Description
County Concrete Access is located on the north end of the lake, near Chub Lake park.


Lake Characteristics

Lake Area (acres): 313.42
Littoral Area (acres): 169
Maximum Depth (ft): 28
Water Clarity (ft): 4.8

Dominant Bottom Substrate: Sand (Abundant)
Abundance of Aquatic Plants: 26 Varieties Sampled
Maximum Depth of Plant Growth (ft): 11.2 (3-18)


Did you know? Each year, DNR fisheries personnel stock game fish fry and fingerlings in lakes lacking habitat for natural reproduction.

Fish Sampled for the 2009 Survey Year

Species

Gear Used

Number of fish per net

Average Fish Weight (lbs)

Normal Range (lbs)

Caught

Normal Range

Black Bullhead Trap net 0.78 0.5 - 5.7 0.69 0.4 - 0.8
Gill net 0.33 1.0 - 16.5 0.93 0.3 - 0.7
Black Crappie Trap net 5.00 0.8 - 4.3 0.22 0.2 - 0.5
Gill net 7.83 1.0 - 4.8 0.21 0.2 - 0.4
Bluegill Trap net 9.33 8.3 - 50.1 0.09 0.1 - 0.3
Gill net 1.50 N/A 0.19 N/A
Brown Bullhead Trap net 0.56 0.5 - 3.3 1.57 0.6 - 1.0
Gill net 1.33 0.5 - 4.3 1.41 0.5 - 1.0
Golden Shiner Trap net 0.56 0.1 - 1.7 0.07 0.1 - 0.1
Gill net 0.83 0.4 - 3.6 0.08 0.1 - 0.2
Largemouth Bass Trap net 0.33 0.3 - 1.4 0.05 0.3 - 1.0
Gill net 2.50 0.3 - 1.8 0.90 0.6 - 1.3
Northern Pike Trap net 1.33 N/A 2.08 N/A
Gill net 15.17 4.8 - 12.5 2.62 1.4 - 2.5
Pumpkinseed Trap net 4.11 2.8 - 10.3 0.12 0.1 - 0.2
Gill net 2.67 N/A 0.17 N/A
Rock Bass Trap net 1.33 0.5 - 1.5 0.29 0.3 - 0.5
Gill net 4.17 0.3 - 1.2 0.29 0.3 - 0.5
Walleye Trap net 0.22 0.3 - 0.5 3.46 1.0 - 4.4
Gill net 9.17 0.5 - 3.0 2.73 1.7 - 3.6
White Sucker Gill net 2.50 0.5 - 2.3 2.28 1.6 - 2.6
Yellow Perch Trap net 0.67 0.3 - 2.8 0.14 0.1 - 0.3
Gill net 1.00 2.0 - 21.5 0.11 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 2009 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 8 1 0 0 0 0 9
black crappie 38 47 6 0 0 0 0 0 92
bluegill 73 20 0 0 0 0 0 0 93
brown bullhead 0 0 1 11 1 0 0 0 13
golden shiner 9 1 0 0 0 0 0 0 10
largemouth bass 4 6 2 3 3 0 0 0 18
northern pike 0 0 0 1 32 54 12 3 103
pumpkinseed 43 9 0 0 0 0 0 0 53
rock bass 14 20 3 0 0 0 0 0 37
walleye 0 0 2 0 24 31 0 0 57
white sucker 0 0 0 3 12 0 0 0 15
yellow perch 1 11 0 0 0 0 0 0 12


For the record, the largest Brook Trout taken in Minnesota weighed 6 lbs., 5.6 oz. and was caught:

    Where: Pigeon River, Cook County
    When: 9/2/00
    Statistics: 24" length, 14.5" girth

Fish Stocking Activity

Fish Stocked by Species for the Last Ten Years

Year Species Size Number Pounds
2012 Walleye fingerlings 6,427 334.7
2010 Walleye* fingerlings 5,066 337.7
2008 Walleye* fingerlings 11,264 337.2
2006 Walleye* fingerlings 1,231 107.1
  Walleye fingerlings 6,568 205.3
2004 Walleye fingerlings 10,683 342.0

Privately Stocked Fish
* indicates privately stocked fish. Private stocking includes fish purchased by the DNR for stocking and fish purchased and stocked by private citizens and sporting groups.

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
CHUB
Carlton Co., 09000800
Crappie All sizes        
Largemouth Bass   All sizes     Mercury
Northern Pike   All sizes     Mercury
Walleye     All sizes   Mercury

General Population

LAKE NAME
County, DOWID
Species Meal Advice Contaminants
Unrestricted 1 meal/week 1 meal/month Do not eat
CHUB
Carlton Co., 09000800
Crappie All sizes        
Largemouth Bass   All sizes     Mercury
Northern Pike   All sizes     Mercury
Walleye   All sizes     Mercury

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 08/31/2009)

Chub Lake is a 311 acre lake located near Carlton, Minnesota with 54% (169 acres) littoral area and a maximum depth of 28 feet. A state owned, concrete back-in access is located on the north end of the lake, near Chub Lake Park. Walleye fry have been stocked in even years from 1982 through 2008. Chub Lake was last assessed in 2004. Chub Lake was surveyed during the summer of 2009 to update information about fish populations and to evaluate the success of the walleye stocking program.

Walleye fingerlings have been stocked into Chub Lake during even years since 1992. Walleye abundance of 9.2 per gillnet lift was up from 2004 (3.3) and was above average compared to other Minnesota lakes of similar type. Walleye average length was impressive at 19.5 inches and growth was average when compared to other Duluth Area lakes. All year-classes from 2000 to 2008 were represented except 2006. Fifty-two percent of the walleyes aged were from the 2004 year-class. Eighty-five percent of the walleyes aged corresponded to stocked year-classes.

A total of 90 largemouth bass were sampled with electrofishing equipment. The catch rate of largemouth bass was 125.9 fish per hour of electrofishing on-time. Largemouth bass average length was 13.0 inches and growth was slow compared to other Duluth Area lakes. All year-classes from 1997 through 2008 were represented in the sample. Shoreline seining captured 36 young-of-the-year (YOY) largemouth bass with an average length of 1.8 inches.

Northern pike abundance of 15.2 per gillnet lift was up from 2004 (7.2) and average compared to other Minnesota lakes of similar type. Historically, the northern pike CPUE has been increasing in Chub and has ranged from 5.5 (1976) to 15.2 (2009). Average length was 21.7 inches and growth was average compared to other Duluth Area lakes. All year-classes from 2001 to 2008 were represented.

Black crappie abundance of 5.0 per trapnet lift was down from 2004 (0.9) and was above average when compared to other Minnesota lakes of similar type. Black crappie mean length was 7.0 inches and growth was average compared to other Duluth Area lakes. All year-classes from 2003 to 2007 were represented.

Bluegill abundance of 9.3 per trapnet lift was up from 2004 (8.0) and average when compared to other Minnesota lakes of similar type. Average length of sampled bluegills was 4.6 inches and growth was slow compared to other Duluth Area lakes. All year-classes from 1997 to 2007 were represented. Shoreline seining captured 3 YOY bluegill with an average length of 1.8 inches.

Yellow perch abundance of 1.0 per gillnet lift was down from 2004 (4.0) and was below average compared to other Minnesota lakes of similar type. Average length of perch was 6.6 inches, but not enough individuals were sampled to evaluate stock density or growth.

Other fish species sampled included black and brown bullhead, golden shiner, Johnny darter, brook stickleback, spottail shiner, pumpkinseed sunfish, rock bass and white sucker.

Information was collected on aquatic vegetation, substrate and water quality. Twenty-six aquatic plant species or species groups were identified along 20 transects. Flat-stem pondweed was the most frequently found plant (90% of transects) followed by variable-leaf pondweed, bushy pondweed and Robbins pondweed (85%, 80% and 80% of transects, respectively). The most common substrate types were sand, gravel and rubble which were identified along 95%, 65% and 35% of the transects, respectively. Results of laboratory water analysis indicate Chub is an alkaline, moderately hard water lake with moderate fertility.

A substantial percentage (74%) of lakeshore homeowners on Chub Lake have open yards extending to the shoreline. Lakeshore owners can prevent excessive nutrient loading by avoiding lawn fertilization, limiting aquatic vegetation removal, and implementing riparian best management practices. The shoreline restoration near the public access located in Chub Lake Park provides a good demonstration of riparian best management practices. This project restored a portion of the Chub Lake Park shoreline that was previously high maintenance turf grass to native vegetation and provides a buffer to filter nutrients for the lake.

Eurasion water milfoil was discovered growing near the boat launch by field staff during this assessment. It appears as though the plant has been in Chub Lake for a couple of growing seasons as plants were rooted and "topped out" in some stands. MN DNR Ecological Resources staff conducted a more detailed assessment of the extent of the infestation and found the plant limited to areas around the boat launch and one small patch near the point on the western shoreline. The DNR has designated the lake as infested waters and posted signs to notify those using the public water access. Designation of the lake as an infested water prohibits the transport of water and harvest of bait.


For more information on this lake, contact:

Area Fisheries Supervisor
5351 North Shore Dr
Duluth, MN 55804
Phone: (218) 525-0853
Internet: Duluth Fisheries
E-Mail: Duluth.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 B0488 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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