Fisheries Lake Survey

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Name: Julia

Nearest Town: Puposky
Primary County: Beltrami
Survey Date: 08/13/2013
Inventory Number: 04016600
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Public Access Information

Ownership Type Description
DNR Concrete


Lake Characteristics

Lake Area (acres): 511.26
Littoral Area (acres): 167
Maximum Depth (ft): 43
Water Clarity (ft): 6.5

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


Did you know? Minnesota waters support 153 species of fish.

Fish Sampled for the 2013 Survey Year

Species

Gear Used

Number of fish per net

Average Fish Weight (lbs)

Normal Range (lbs)

Caught

Normal Range

Black Bullhead Trap net 0.22 0.3 - 3.2 0.29 0.4 - 0.8
Gill net 0.89 0.8 - 7.7 0.32 0.4 - 0.8
Black Crappie Trap net 1.11 0.7 - 3.4 0.43 0.2 - 0.6
Gill net 0.11 0.6 - 3.5 0.45 0.2 - 0.5
Bluegill Trap net 7.22 6.1 - 46.6 0.17 0.1 - 0.3
Gill net 0.11 N/A 0.58 N/A
Brown Bullhead Trap net 6.67 0.4 - 2.1 0.43 0.6 - 1.1
Gill net 1.11 0.5 - 2.5 0.84 0.6 - 1.0
Largemouth Bass Trap net 0.11 0.3 - 1.3 1.05 0.2 - 0.7
Northern Pike Trap net 1.00 N/A 2.32 N/A
Gill net 13.67 3.5 - 10.5 2.12 1.6 - 2.9
Pumpkinseed Trap net 3.89 2.0 - 8.5 0.09 0.1 - 0.2
Gill net 0.11 N/A 0.28 N/A
Rock Bass Trap net 2.33 0.5 - 1.8 0.28 0.2 - 0.5
Gill net 0.67 0.3 - 1.9 0.48 0.2 - 0.5
Walleye Trap net 1.78 0.3 - 0.7 2.45 1.1 - 3.4
Gill net 9.89 1.3 - 5.0 2.14 1.3 - 2.5
Yellow Perch Trap net 13.56 0.5 - 3.3 0.15 0.1 - 0.2
Gill net 58.44 3.4 - 43.6 0.21 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 2013 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 10 0 0 0 0 0 0 10
black crappie 3 4 4 0 0 0 0 0 11
bluegill 40 26 0 0 0 0 0 0 66
brown bullhead 0 49 9 6 3 0 0 0 70
largemouth bass 0 0 1 0 0 0 0 0 1
northern pike 0 0 1 1 42 72 15 1 132
pumpkinseed 32 2 0 0 0 0 0 0 36
rock bass 10 13 3 0 0 0 0 0 27
walleye 0 0 10 27 38 23 7 0 105
yellow perch 127 415 73 6 0 0 0 0 648


For the record, the largest White Crappie taken in Minnesota weighed 3 lbs., 15 oz. and was caught:

    Where: Lake Constance, Wright County
    When: 7/28/02
    Statistics: 18" length, 16" girth

Fish Stocking Activity

Fish Stocked by Species for the Last Ten Years

Year Species Size Number Pounds
2012 Walleye fry 250,000 2.2
2011 Walleye fry 250,000 2.2
2009 Walleye fry 250,000 2.3
2008 Walleye fry 250,000 2.3
2006 Walleye fry 250,000 2.3
2005 Walleye fry 250,000 2.3

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
JULIA
Beltrami Co., 04016600
Northern Pike   shorter than 20" 20" or longer   Mercury
Walleye   shorter than 20" 20" or longer   Mercury

General Population

LAKE NAME
County, DOWID
Species Meal Advice Contaminants
Unrestricted 1 meal/week 1 meal/month Do not eat
JULIA
Beltrami Co., 04016600
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 08/13/2013)

Lake Julia is a 450 acre lake with a maximum depth of 43 feet and water clarity around 6.5 feet. The public access has a dock and concrete ramp and is on the north side of the lake off of County Road 26. There is room for about 8 trucks with trailers; however, the state of the ramp makes launching a large boat challenging but still possible. The nearest town is Puposky which is about 10 miles north of Bemidji just west of County Hwy 15. Shoreline development primarily consists of a moderate number of private homes and lake cabins. The Mud River flows in from Crane Lake and exits on the north side into Puposky Lake and eventually makes its way north to Lower Red Lake. Historically, minor algal blooms are common in the summer giving the water a light green color; however, healthy oxygen levels are generally only reduced beyond depths of 18 feet by the end of summer. Lake Julia is primarily managed for Walleye and secondarily managed for Northern Pike and Yellow Perch.

Stocking records for Lake Julia go back to 1908 when Brown Trout, Black Crappie, Lake Trout, Sunfish, and Walleye were introduced to enhance the resident fish community. Northern Pike were stocked sporadically from the 1950's through the late 1970's alongside Walleye. However, since 1982 only Walleye fry have been stocked at a frequency of 2 out of 3 years and most recently at a rate of 1,500 fry/littoral-acre. Currently, the fish community in Lake Julia consists of Black and Brown Bullhead, Black Crappie, Bluegill, Northern Pike, Pumpkinseed Sunfish, Rock Bass, Yellow Perch, and most notably Walleye. Lake Julia is becoming an ever more popular Walleye lake because of the abundance of "eater" sized fish with plenty of opportunity to catch one much larger.

The Walleye population is doing well with the average fish weighing about 2.2 lbs at a length of 17.7 inches. Gillnet catch rates were down from 11.9 fish/net in 2003 to 9.9 fish/net in 2013 but average size has increased. It appears that the majority of the Walleye population is dependent on supplemental stocking but the presence of year classes from non-stocked years indicate a notable amount of natural reproduction is occurring. In fact, the most recent strong year classes observed were 2009, 2010, and 2011(2010 was not a stocking year).

The Northern Pike population in Lake Julia is expanding. In 2013, gillnets caught 13.7 fish/net, the highest catch rate since 1983. Even though catch rate is up, average size has remained at 21.3 inches in length and 2.1 lbs with the majority of pike falling in the 18-24 inch range. Successful spawning is attributed to Mud Creek connecting to Crane and Puposky, shallow lakes with dense aquatic vegetation and abundant prey species, ideal for Northern Pike recruitment. The small size structure is likely attributed to harvest since comparable lakes with protective size regulations have measurably better size distributions.

Yellow Perch are very abundant with over 600 captured during the 2013 assessment and sizes ranging from 5 to 12.5 inches. Average length is around 7.25 inches but larger fish are abundant and easily targeted.

Bluegills are also noteworthy with over 65 captured and sizes reaching 8.5 inches. They were first recorded in Lake Julia in 2003 so it is believed that both their abundance and size structure are still expanding. Black Crappies were also first discovered in the early 2000's and were captured with lengths recorded over 11 inches in 2013. While these new arrivals may add diversity to the fishery, new species introductions may have unintended consequences. The simple fish community dominated by Walleye, Yellow Perch and Northern Pike has responded exceptionally well to Walleye fry stocking for decades. As these new species continue to expand they may alter the conditions that made that management action so effective. Hopefully Walleye will remain as the primary managed species as long as fry stocking continues to produce a healthy, fast growing, and well-structured population.


For more information on this lake, contact:

Area Fisheries Supervisor
2114 Bemidji Ave
Bemidji, MN 56601
Phone: (218) 308-2339
Internet: Bemidji Fisheries
E-Mail: Bemidji.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 C2444 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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