Lake information report

Name: Johanna

Nearest Town: Arden Hills
Primary County: Ramsey
Survey Date: 06/30/2008
Inventory Number: 62007800

Purchase a walleye stamp. Your voluntary contribution will be used to support walleye stocking.

Public Access Information

Ownership	Type	Description
County	Concrete	Located on north shore in county park
County	Concrete

Lake Characteristics

Lake Area (acres): 211.91
Littoral Area (acres): 95.93
Maximum Depth (ft): 43
Water Clarity (ft): 3.9 (3.75-4.1)

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

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 2008 Survey Year

Species	Gear Used	Number of fish per net		Average Fish Weight (lbs)	Normal Range (lbs)
Species	Gear Used	Caught	Normal Range	Average Fish Weight (lbs)	Normal Range (lbs)
Black Bullhead	Trap net	0.33	0.7 - 25.7	1.01	0.3 - 0.6
Black Crappie	Trap net	2.22	1.8 - 21.2	0.15	0.2 - 0.3
	Gill net	5.83	2.5 - 16.5	0.14	0.1 - 0.3
Bluegill	Trap net	115.33	7.5 - 62.5	0.10	0.1 - 0.3
	Gill net	8.67	N/A	0.10	N/A
Bowfin (dogfish)	Trap net	0.56	0.4 - 1.3	3.99	2.3 - 4.1
Green Sunfish	Trap net	2.11	0.2 - 1.3	0.05	0.1 - 0.2
Hybrid Sunfish	Trap net	2.33	N/A	0.12	N/A
Largemouth Bass	Gill net	0.33	0.3 - 0.8	0.23	0.4 - 1.0
Northern Pike	Gill net	4.83	1.5 - 7.3	4.21	2.0 - 3.5
Pumpkinseed	Trap net	5.89	0.7 - 4.2	0.12	0.1 - 0.2
	Gill net	1.33	N/A	0.15	N/A
Tiger Muskellunge	Gill net	0.50	N/A	6.75	N/A
Walleye	Trap net	0.11	0.3 - 1.2	0.06	0.8 - 2.8
	Gill net	1.50	1.2 - 6.3	2.53	1.2 - 2.7
White Sucker	Gill net	0.33	0.4 - 2.2	2.30	1.5 - 2.4
Yellow Bullhead	Trap net	0.56	0.9 - 5.7	0.81	0.5 - 0.8
	Gill net	0.33	0.5 - 7.5	1.16	0.5 - 0.8
Yellow Perch	Trap net	0.33	0.3 - 1.7	0.07	0.1 - 0.2
	Gill net	15.33	2.0 - 27.9	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 2008 Survey Year

Species	Number of fish caught in each category (inches)
Species	0-5	6-8	9-11	12-14	15-19	20-24	25-29	30+	Total
black bullhead	0	0	0	3	0	0	0	0	3
black crappie	5	50	0	0	0	0	0	0	55
bluegill	861	224	0	0	0	0	0	0	1090
bowfin (dogfish)	0	0	0	0	1	4	0	0	5
green sunfish	19	0	0	0	0	0	0	0	19
hybrid sunfish	15	6	0	0	0	0	0	0	21
largemouth bass	0	2	0	0	0	0	0	0	2
northern pike	0	0	0	0	0	12	14	3	29
pumpkinseed	48	13	0	0	0	0	0	0	61
tiger muskellunge	0	0	0	0	0	0	1	2	3
walleye	0	1	0	0	5	4	0	0	10
white sucker	0	0	0	0	2	0	0	0	2
yellow bullhead	0	0	4	3	0	0	0	0	7
yellow perch	23	72	0	0	0	0	0	0	95

For the record, the largest Shortnose Gar taken in Minnesota weighed 4 lbs., 9.6 oz. and was caught:

Where: Mississippi River, Hennepin County
When: 7/22/84
Statistics: 34.6" length, 10" girth

Fish Stocking Activity

Fish Stocked by Species for the Last Ten Years

Year	Species	Size	Number	Pounds
2012	Tiger Muskellunge	fingerlings	432	139.3
2011	Walleye	fingerlings	9,450	269.0
2010	Tiger Muskellunge^*	fingerlings	426	124.9
2009	Tiger Muskellunge	fry	22,824	1.1
	Walleye	yearlings	1,375	275.0
2008	Tiger Muskellunge^*	fingerlings	426	108.1
2007	Walleye	yearlings	7	7.0
	Walleye	fingerlings	7,440	186.0
2005	Walleye		14,814	13.0
2003	Walleye	fingerlings	1,033	192.7

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
LAKE NAME County, DOWID	Species	Unrestricted	1 meal/week	1 meal/month	Do not eat	Contaminants
JOHANNA Ramsey Co., 62007800	Bluegill Sunfish			All sizes		Mercury PFOS
	Carp	All sizes
	Crappie			All sizes		Mercury PFOS
	Northern Pike		shorter than 25"	25" or longer		Mercury
	White Sucker		All sizes			Mercury

General Population

LAKE NAME County, DOWID	Species	Meal Advice				Contaminants
LAKE NAME County, DOWID	Species	Unrestricted	1 meal/week	1 meal/month	Do not eat	Contaminants
JOHANNA Ramsey Co., 62007800	Bluegill Sunfish			All sizes		PFOS
	Carp	All sizes
	Crappie			All sizes		PFOS
	Northern Pike		All sizes			Mercury
	White Sucker	All sizes

DOWID - MN DNR, Divion 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 06/30/2008)

Bluegills are the most abundant species sampled in Lake Johanna. The average length captured during the assessment was 5.07 inches. Less than 1% of the bluegills sampled exceeded 7 inches in length. Pumpkinseed and hybrid sunfish were also sampled in high abundance. Black crappies were sampled in below average abundance and size. Walleye were sampled in moderate numbers. Nearly half the walleyes sampled exceeded 20 inches in length. Northern pike were found in average numbers for this lake. The average size caught was 25.9 inches in length and 4.21 pounds. Black bullhead and yellow bullhead were each sampled. Both species had average lengths over 12 inches.

For more information on this lake, contact: Area Fisheries Supervisor 1200 Warner Rd St. Paul, MN 55106 Phone: (651) 259-5831 Internet: East Metro Fisheries E-Mail: MetroEast.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 D0077,D0177 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	Turn in Poachers (TIP): Toll-free: (800) 652-9093