Little Boy LAKE

Little Boy Lake Fishery

Little Boy Lake (DNR #11-0167) has 1372 surface acres and 467 littoral acres and is classified as DNR lake class 22. Maximum depth is 74 feet and shoreline length is 10.02 miles. The lake was mapped in July, 1953. There is a DNR maintained public access on the south end of the lake. The most recent DNR fisheries lake survey was completed in July, 2018 (previously surveyed in 2015 and 2012 and various other prior years as shown below).

Little Boy - DNR Fisheries Management Plans

Prior to 2006, walleye stocking was scheduled for fry stocking every three years (this schedule was not always followed). When the gill netting was completed in 2005 it was determined the walleye fishery was in trouble (CPUE counts were at historic lows). With the assistance of the Walker Area Walleye Coalition in 2006, we improved the walleye stocking on Little Boy from stocking fry every three years to every two years. Gill netting was performed again in 2006 to see if the walleye fishery problems still continued (final results of that survey were not available until spring of 2007). The fishery was still not where it should be so in 2008, we again improved the stocking program to include annual fry stocking and "contingency stocking" of fingerlings - see the DNR Fisheries Management Plans for full information on the new stocking program. In 2011, we reviewed stocking results and because it appears the fry stocking is working well, the DNR agreed to extend our current stocking plan through 2015.

Little Boy Stocking History

Little Boy Stocking History

2014 Update

We agreed to another new stocking plan. This one goes back to every other year stocking so the DNR can assess natural reproduction. This new plan will stock 932,000 fry (2,000 fry/littoral acre) in the even numbered years. We will continue the fall electro-fishing to monitor how the Young of the Year (YOY) have fared. If the electro-fishing reports 1-15 YOY/hour, we will stock fingerlings at 2 lbs/acre, 15-29 YOY/hour = 1 lbs/acre and over 30 YOY/hour = no additional fingerling stocking needed. We would need to have reduced YOY counts for 2 years in a row for the additional stocking to occur. Gill net assessments will be on a 3 year basis starting in 2015 and the lake management fisheries plan will updated in 2021.

Little Boy - Counts per Net, Length, Weight

In the chart below, the blue line represents walleye counts per net. You can see the 2005 and 2006 counts were some of the lowest since 1955. This is the reason we asked the DNR to go to a every other year fry stocking program in 2006. In 2007-2008, we asked the DNR to further alter the Little Boy stocking program and in 2014 updated the plan again (see the DNR Lake Plans tab for full information).

The CPUE (Catch Per Unit of Effort- which in this case is number of fish per net for each type of fish) is shown in the graph below.

The PSD and RSD-P measure the size structure of a fishery and the relative weights also indicate fishery size structure.

The mean length and weight are shown below for the walleye fishery:

Little Boy CPUE and Length Distributions

This chart shows the length frequency of walleye taken in the last several gill nettings.

2006 comments

The data for 2006 shows a high number of 12-14 inch fish, but not many other size fish. In the age frequency data (which is not shown here) it was found that 66% of the netted walleyes were from one year class - the 2003 year class (which was a stocked year). This is part of the reason we asked for the "contingency stocking" program.

2008 comments

The DNR completed gill netting the week of July 21, 2008. The graph shows a couple of interesting points.

  1. Most of the larger walleyes are gone.
  2. Fry were stocked in 1999 and had grown to about 10-13 inch fish in 2002. Fry were stocked in 2003 and had grown to about 10-13 inch fish in 2006. Fry were stocked in 2006 and had grown to about 10-13 inch fish in 2009. Please note the 2005 data (non-stocked year) shows very few 10-13 inch fish. It appears that stocking fry works well in Little Boy Lake.

This chart show the length frequency of Northern Pike. Please note in 2002, there were no northern greater than 25 inches. The Protected Slot Limit (PSL) of 24-36" was implemented in 2003 and in 2005, 2006 and 2008, northern are being caught in the PSL range with 2008 showing marked improvement in northern fishery size. It appears the northern Protected Slot Limit is working well.