Recent Lake Survey Summaries

Here are preliminary summaries of recent sampling not yet posted on LakeFinder, or survey types not found there. Different gear target fish species and sizes quite differently; for example, northern pike and walleye are better caught by gill nets, while bluegill are better caught with trap nets. Values of black crappie might be from either net type. Spring ("ice-out") sampling targets northern pike, walleye, or muskellunge. Our net-based surveys under-sample largemouth bass; electrofishing better evaluates bass abundances and size structures, but requires extra sampling with different equipment.

Go To Other Surveys From 2007-2013


Spring Sampling 2015

Soon after ice-out, we checked Lower Prior Lake to see size and age composition of larger adult walleye and northern pike. We also measured any largemouth bass captured. Results are from 40 total net locations.

Fish Species Number Average Length (in) Max. Length (in)
Lower Prior Walleye 165 18.3 26.6
(Scott) Northern Pike 8 26.7 33.3
4/6-10/15 Largemouth Bass 1 n / a 16.9

Notes:  walleye-- 30% 14-16.9 inches, 37% 17-19.9 inches, 33% 20 inches or larger;  northern pike-- 3 of 8 fish 24-29.9 inches, 2 of 8 fish 30 inches or larger (both in 33-inch size group)


Electrofishing 2014

We sampled using electrofishing--  running electricity through the water with a specialized boat-- in early fall to sample largemouth bass better than the nets used in primary lake surveying methods.

Lake (County) Date Species Number per hour Average length (in) Max length (in)
Steiger (Hennepin)
LMB not avail-- equip. issue 14.0 18.7
Medicine (Hennepin)
  9/25 & 10/1/14
LMB 63 8.2 (many young fish in catch) 17.7


Walleye Presence/Growth Checks 2014

To determine presence and/or size of spring-stocked walleye fry before spending effort to harvest, we sampled the  shallow waters operated in 2014 as possible "rearing ponds." (Because local suitable waters and success have been poor recently, our office might occasionally attempt to raise fingerling walleyes only in limited locations after severe winters.)  Results summaries are below.
Eagle Lake (Carver Co.):  Sampled 8/26/14   No walleyes were sampled in multiple lake locations.  A silver lining is we captured most species we've sampled previously, including adult black crappie, northern pike, bluegill, and yellow perch.  This indicates the 2013-14 winterkill impacts did not completely deplete the fish community.

Lakefront Park Pond: Sampled 8/19/14   No walleyes were sampled, but fathead minnows and bluegills were.  An angler reported seeing largemouth bass earlier in the summer.  Possibility still exists for low-level walleye catches if pond conditions allow survival over several seasons.

McColl Pond: Sampled May 2014   Abundant bluegill predation was noted soon after fry were stocked.  While some walleyes might survive to provide anglers a bonus if conditions remain suitable, McColl is not viable for harvesting fingerlings to stock elsewhere.


Provisional Lake (Netting) Survey Summaries 2014

Note: the software used separates location and/or sampling-crew data; results will be combined once final report is generated, approved, and posted on LakeFinder.

Carver County:
Steiger pdf         Susan pdf         Waconia pdf


Hennepin County:
Calhoun pdf    Cedar pdf    Dutch pdf    Fish pdf   Harriet(1 of 2) pdf Harriet(2 of 2) pdf  Lake of the Isles pdf   Medicine pdf

Minnetonka--    Lower Lake basins pdf       Upper Lake basins pdf        North & West basins pdf


Scott County:
Fish pdf

Spring Sampling 2014

Soon after ice-out, we checked Medicine Lake walleye to see size and age composition of larger adult fish. We also measured the northern pike and largemouth bass captured. Results are from 36 total net locations.

Fish Species Number Average Length (in) Max. Length (in)
Medicine Walleye 50 21.0 27.6
(Hennepin) Northern Pike 173 22.9 35.0
4/17-22 Largemouth Bass 27 15.9 19.8


Winterkill Checks 2014

The cool conditions of spring 2014 allowed us to do some assessment of winterkill impacts.  Summary information is below.
Eagle Lake (Carver Co.):  Sampled 4/25/14-- entire shoreline electrofished.  Only two golden shiner captured and one larger-sized fish too far out of range to ID.  Lake was stocked in May at 2.4 times its normal walleye fry quota.

Mitchell Lake (Hennepin Co.): Angler report late May 2014   Despite winter 2013-14 oxygen readings dropping to the low-2 ppm range, no dead fish were reported.  In late May, a lake resident sent us images of adult northern pike, largemouth bass, and walleye caught from the same lake location, indicating some adult gamefish survival.



2013 Other Surveys / Fish Sampling

2012 Other Surveys / Fish Sampling

2011 Other Surveys / Fish Sampling

2010 (only Cedar Lake [Scott Co.] Special Assessment)

2009 Other Surveys / Fish Sampling

2008 Other Surveys / Fish Sampling

2007 Other Surveys / Fish Sampling

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