Lake information report

Name: ANN

Nearest Town: ZIMMERMAN
Primary County: Sherburne

Survey Date: 06/25/2001
Inventory Number: 71-0069-00

Public Access Information

Ownership	Type	Description
Township	Concrete	Access is owned and maintained by the township. Open to public use.

Lake Characteristics

Lake Area (acres): 184.00
Littoral Area (acres): 138.00
Maximum Depth (ft): 26.00
Water Clarity (ft): 11.50

Dominant Bottom Substrate: detritus, sand, silt
Abundance of Aquatic Plants: abundant
Maximum Depth of Plant Growth (ft): 16.50

Did you know? Much of Minnesota's fisheries program is reimbursed by the Federal Aid in Sport Fish Restoration Program (federal excise tax), administered by the U.S. Fish and Wildlife Service.

Fish Sampled up to the 2001 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 Crappie	Gill net	1.5	1.0 - 3.9	0.24	0.2 - 0.4
Bluegill	Gill net	15.5	N/A - N/A	0.15	N/A - N/A
	Trap net	165.0	9.5 - 57.3	0.14	0.1 - 0.2
Hybrid Sunfish	Gill net	0.2	N/A - N/A	0.27	N/A - N/A
	Trap net	2.4	N/A - N/A	0.14	N/A - N/A
Largemouth Bass	Trap net	0.7	0.3 - 1.4	0.21	0.2 - 0.8
Northern Pike	Gill net	11.8	3.5 - 8.9	2.73	1.6 - 3.0
	Trap net	0.1	N/A - N/A	4.65	N/A - N/A
Pumpkinseed Sunfish	Gill net	0.5	N/A - N/A	0.04	N/A - N/A
	Trap net	0.6	1.5 - 6.8	0.12	0.1 - 0.3
Painted Turtle	Trap net	5.1	N/A - N/A	0.68	N/A - N/A
Snapping Turtle	Trap net	2.4	N/A - N/A	ND	N/A - N/A
White Sucker	Gill net	0.3	0.3 - 1.7	3.43	1.7 - 2.7
Yellow Bullhead	Gill net	73.7	2.1 - 15.8	0.51	0.3 - 0.5
	Trap net	6.8	2.7 - 13.5	0.58	0.4 - 0.6
Yellow Perch	Gill net	1.7	1.0 - 10.3	ND	0.1 - 0.2

Normal Ranges represent typical catches for lakes with similar physical and chemical characteristics.

Length of Selected Species Sampled for All Gear for the 2001 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 Crappie	0	8	1	0	0	0	0	0	9
Bluegill	211	145	0	0	0	0	0	0	356
Hybrid Sunfish	15	8	0	0	0	0	0	0	23
Largemouth Bass	3	1	1	0	0	0	0	0	5
Northern Pike	0	0	0	1	11	43	14	1	70
Pumpkinseed Sunfish	8	0	0	0	0	0	0	0	8
Yellow Bullhead	3	89	312	9	0	0	0	0	413
Yellow Perch	3	4	0	0	0	0	0	0	7

For the record, the largest Splake taken in Minnesota weighed 13 lbs., 5.44 oz. and was caught:

Where: Larson Lake, Itasca County
When: 2/11/01
Statistics: 33.5" length, 19" girth

Fish Consumption Guidelines

No fish consumption guidelines are available for this lake. For more information, see the "Fish Consumption Advice" pages at the Minnesota Department of Health.

Status of the Fishery (as of 06/25/2001)

Ann Lake is located in Sherburne County, four miles west of Zimmerman. The lake is 184 acres in size, has a maximum depth of 26 feet and a public access is located at the north end of the lake. The lake has good water quality and clarity and supports a diverse plant community. There is a history of winterkills and a winter aeration system has been used with limited success. The lake is managed for northern pike, largemouth bass and panfish.

Northern pike were less abundant, but larger than in the 1989 survey; however, both the number of pike and their size were above average for this lake type. The average size of pike captured in gill nets was 22.6 inches and 2.7 pounds; the largest individual captured was 32.8 inches. Pike grew slowly in Ann Lake, likely due to their relatively high numbers and competition for food. Yellow perch are a favorite prey fish for pike, but very few were captured during the survey; perch abundance is probably limited by the high number of pike.

Largemouth bass numbers and size from electrofishing were below average for the area and their growth was slow; however, the lake is difficult to sample and bass may be more abundant than these results indicate. The average length was 8.2 inches and the largest individual captured was 15.9 inches. In contrast, bluegill were highly abundant in the 2001 survey and higher than all previous surveys. Bluegill average size was 5.6 inches, the largest was 7.6 inches and growth was slow. Lower bluegill abundance would likely improve their size and growth. Few black crappie were captured and previous surveys have also shown low numbers.

Anglers can help improve the fishery by selectively harvesting smaller pike (less than 24 inches) and releasing most bass. This may result in faster growth and a larger average size for northern pike and bluegill. Lakeshore owners can protect water quality and provide habitat for fish and wildlife by restoring and protecting shoreline in a natural condition.

For more information on this lake, contact: Area Fisheries Supervisor 7372 State Hwy 25 SW Montrose, MN 55363 Phone: (763) 675-3301 Internet: Montrose Fisheries E-Mail: Montrose.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 C0795 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