Lake Sherwood

2008 Electroshocking Fish Census


Guiding the Lake Sherwood community to provide a superior lake environment.

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LAKE SURVEY RESULTS AND RECOMMENDATIONS

Missouri Department of Conservation 

Lake: Lake Sherwood

County Warren

Date: 5/22/2008

Size: 160 acres

Secchi: 36”

Conductivity: 230

Surface Temp: 67

Air Temp: ?

Depth:

Gear: EF

Amps: 8

Volts: 275

Total time: 42 min

Netters: 2

Biologist:  Kluesner

Bass PSD(12):  17.8                 Bass RSD(15):  4.2

Bluegill PSD(6):  22.2               Bluegill RSD(8):  3.7

 

Lake Conditions and Fish Population Characteristics:

 

Lake Sherwood 

1)                 High numbers of largemouth bass (208/hour) were taken during the survey.  Bass ranged in size from 3.5 to 20.5 inches. Bass were in fair to good condition.

 

2)                 Moderate numbers of bluegill (91/hour) were taken during the survey, ranging in size from 2.0 to 8.5 inches.

3)                 Two black crappie were caught measuring 9.0 and 9.5 inches.

 

4)                 Seven channel catfish were captured between 14.0 to 22.0 inches.  (Note: The type of electrofishing gear used in this survey is generally not effective for sampling catfish.)

 

5)         Other fish collected include: green sunfish, redear sunfish, and warmouth.

 

6)                 The water had a visibility of 3 feet and a surface temperature of 67 degrees F.

 

 

Management Recommendations

 

Largemouth Bass


The bass catch rate was far higher this year than in previous samples.  This may be due to better sampling conditions, as water clarity was down this spring.  The catch rate of larger sized bass was still low.  Of the 208 LMB/Hour captured only 30 were over twelve inches long.  PSD was down to 17.8 from 41.2 and RSD(15) was down to 4.2 from 14.7.  From all this information we can conclude that the largemouth population in Lake Sherwood is not moving in the desired direction.  In order to improve the size structure of the population more needs to be done to increase bass harvest.  The attached graph shows that the bulk of the fish are currently in the 8 – 11 inch range.  Harvest this size class at a rate of 25 – 30/acre/year to improve growth rate and size structure of the bass population.

 Bluegill

The catch rate of bluegill was also a little higher than in the previous sample.  PSD and RSD were both more than doubled from the last sample, which is good if bluegill fishing is the goal, but not good if trophy bass fishing is the goal.   A positive shift in the size structure a prey species population is the typical response to a negative shift in the predator species population – further evidence that the bass population has become more stunted over the past few years.

Redear Sunfish

Some nice sized redear were collected; a few in the 9 to 10 inch range.  Enjoy the hunt for the 11 and 12 inchers! 

 

Crappie

It doesn’t seem that crappie in the large lake are much of a threat for overpopulation.  The water clarity is probably the main factor in keeping crappie numbers low.  I’ve heard that the community is stocking additional adult crappie each year.  While I think the chance of causing a problem in this instance is lower than average, stocking of this nature has never been a recommendation of the conservation department.  I don’t think there is one MDC managed lake where we have stocked adult crappie on top of an existing crappie population.  As my electrofishing efforts seldom result in an accurate crappie sample, it is up to the crappie anglers to keep an eye on the crappie population and recognize the symptoms of an exploding crappie population so that action can be taken if necessary.  And as always: It is recommended that crappie be kept under heavy harvest pressure, to reduce the chance of developing a stunted crappie problem. Keeping crappie numbers low will also help bass growth, as crappie compete with bass for food. 

 

Catfish

Harvest channel catfish as you like.  Restock channel catfish periodically (every 1-2 years) on a put-and-take basis to replace those harvested plus 10% for natural mortality.  Stock fish which are 8 inches or larger to avoid predation by largemouth bass.  Maintain harvest records (Angler Diary) to provide an estimate of the number of fish to restock. 

 

Other species

Remove all green sunfish caught. 

 

Fish Cover

The past few years have brought some vegetation changes to the lake.  Curley leaf pondweed became an issue a couple years back.  That seems to be coming under control.  The rocky shoreline makes beneficial shoreline vegetation establishment difficult in many areas.  The community may wish to consider attempting to establish spadderdock in some of the coves.  It is a lily pad type aquatic plant.  It spreads slowly and provides great vegetative cover for fish.  More information on vegetation establishment is enclosed. Continue adding brush piles in all feasible areas.  Cover placed in 4 – 8 feet of water will be of the most benefit to fish. The tops of the trees should be visible just under the waterline.  Hinge cutting trees into the lake is another great way to add woody cover, especially along the steep shoreline areas where conventional brush pile placement may be difficult.  The enclosed pamphlet “Fishing in a Barrel” has ideas and guidelines for creating woody cover.

 

 

LAKE SURVEY RESULTS AND RECOMMENDATIONS

Missouri Department of Conservation 

Lake: Lake Allen

County: Warren

Date: 5/22/2008

Size: 4 acres

Secchi: 54”

Conductivity: 280

Surface Temp: 67

Air Temp: ?

Depth:  --

Gear: EF

Amps: 8

Volts: 250

Total time: 20 min

Netters: 2

Biologist: Kluesner

Bass PSD(12):  28.1                   Bass RSD(15):  3.5

Bluegill PSD(6):  37.1                Bluegill RSD(8):  2.9

 

Lake Conditions and Fish Population Characteristics:

 

Lake Allen 

1)                 High numbers of largemouth bass (270/hour) were taken during the survey.  Bass ranged in size from 3.5 to 15.0 inches.  Bass were in fair to good condition.

 

2)                 Moderate numbers of bluegill (143/hour) were taken during the survey, ranging in size from 2.0 to 8.0 inches.

 

3)                 Four channel catfish were captured in the 21-22 inch range.  (Note: The type of electrofishing gear used in this survey is generally not effective for sampling catfish.)

 

4)                 Two black crappie were captured.  Both were 10.5 inches long.

 

5)                 Other fish collected include: green sunfish, redear sunfish, and warmouth.

 

Management Recommendations

 

Largemouth Bass

The bass population in Lake Allen is stunted.  The bulk of bass captured were in the 10 -12 inch range.   Increase harvest of fish in this size range if improved bass fishing is the community’s goal.  If the community wishes to manage a lake for sunfish, Lake Allen is probably a good one to designate; in which case bass harvest should be kept lower.  For good bluegill (and other sunfish) fishing harvest only 15 – 20 bass/acre/year.

Bluegill

The bluegill population is doing fine, with more than a third of the fish captured measuring 6 inches or better.  Enjoy good bluegill fishing and harvest no more than 125/acre/year.

 

Redear

Several very nice size redear (10 – 11 inches) were collected.  Attached is an article about redear fishing written for the Conservationist a couple years back.  Perhaps a similar article in your newsletter could inform community residents about this species and how to take advantage of this great resource.

 

Crappie

A couple nice sized crappie were sampled.  It is recommended that crappie be kept under heavy harvest pressure, to reduce the chance of developing a stunted crappie problem.  Keeping crappie numbers low will also help bass growth, as crappie compete with bass for food.

Catfish

Harvest channel catfish as you like.  Restock channel catfish periodically (every 1-2 years) on a put-and-take basis to replace those harvested plus 10% for natural mortality.  Stock fish which are 8 inches or larger to avoid predation by largemouth bass.  Maintain harvest records (Angler Diary) to provide an estimate of the number of fish to restock.
 

Other species

Remove all green sunfish caught.

 

Habitat

There is a lot of good brushy habitat along the shoreline of Lake Allen.  Make sure to replace brush piles as needed.  Establishment of shoreline vegetation on some of the banks would be a wonderful habitat improvement.  Pickerelweed and arrowhead are both good choices.  Please see the enclosed pamphlet “Establishing Beneficial Aquatic Vegetation in Ponds and Lakes” for more information.