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Category: Lake Management

Wisconsin’s Vilas County “Lake Leaders” enhance lake stewardship getting attention

Posted on by david

Photo Caption: Oneida and Vilas County graduates of Crew 9 of the Lake Leaders Institute at Aldo Leopold’s Shack. From left to right are Quita Sheehan, Dave Blunk, Kathy Noel, Laura Herman, Dennis Burg, Carol Warden, and Steve Budnik.Photo Caption: Oneida and Vilas County graduates of Crew 9 of the Lake Leaders Institute at Aldo Leopold’s Shack. From left to right are Quita Sheehan, Dave Blunk, Kathy Noel, Laura Herman, Dennis Burg, Carol Warden, and Steve Budnik.

Oneida, Vilas County residents recognized as Lake Leaders

Seven Oneida and Vilas County residents recently graduated from the Wisconsin Lake Leaders Institute.  The Lake Leaders Institute is a statewide leadership program aimed at helping lake stewards gain a better understanding of lake ecology and how to work with state and local governments to assure lakes get the attention they need.  Through a combination of reading, classroom activities, and field experiences, participants learned about lake management, local and state government, and leadership skills.
The Wisconsin Lake Leaders Institute draws participants from across the state to take part in a series of three two-day seminars.   Participants demonstrate a commitment to protecting the integrity of the lakes in Wisconsin with an investment of their time and a $300 tuition fee.   Carol Warden, one of the recent graduates, reflects their passion “I’ve found nothing on earth more calming, life-giving, satisfying, and exhilarating than time spent on a lake.  And therefore, I can find nothing more on earth that I want to work harder to protect and keep than our lakes.” 
Local members participating as part of “Crew 9” Lake Leaders include Dave Blunk of Squaw Lake in Vilas and Oneida counties; Steven Budnik of the Turtle Lakes Chain in Winchester; Dennis Burg of the Eagle River Chain of Lakes; Laura Herman, Statewide Citizen Lake Monitoring network Coordinator with UWEX; Katherine Noel from Indian Lake in Oneida County; Quita Sheehan, Vilas County Conservation Specialist; and Carol Warden, Aquatic Invasive Species Specialist with the UW Center for Limnology at Trout Lake Station.  The graduation ceremony took place at the Aldo Leopold Shack near Baraboo, a fitting setting for celebrating the lake leaders accomplishments and looking ahead to their conservation journeys in the world of lakes.
(more)
“This is the most complete lake ecology course I’ve ever been involved in,” commented Dave Blunk.  Professional lake workers agreed.  “I have worked with lake issues for years and I still learned so much from the Lake Leaders Institute.  The sessions covered topics ranging from leadership, values, and environmental ethics to lake ecology and human impacts to lake advocacy and citizen involvement.  It was an “A to Z” lake learning experience,” said Laura Herman.
All this passion and commitment benefits Wisconsin taxpayers and lake users.  “With over 15,000 lakes statewide and a modest number of state staff in service to protect them, it is clear that no one state agency or unit of government can independently provide the attention that each lake deserves” explained Patrick Goggin, UW-Extension Lake Specialist.  “This leadership program provides local lake leaders with effective tools and resources to assist them as they volunteer their skills and talents to the stewardship of our lakes”.
The Wisconsin Lakes Partnership is a team made up of the University of Wisconsin-Extension, the Wisconsin Department of Natural Resources, and the citizen advocacy organization Wisconsin Lakes.  Together they recognized the need for new and on-going leadership in the management of our lakes and created the Wisconsin Lake Leaders Institute in 1996.  The mission of the Institute is to assist citizen lake leaders or “crew members,” in developing and enhancing both their technical and people skills, ultimately enriching their communities and the waters within them.  Since its inception, 200+ participants have graduated from the Institute and have made significant contributions in addressing a host of diverse water management challenges. The program has received national attention as an effective strategy to enhance lake stewardship and protection. Dozens of unique habitat models at fishiding.com
For more information about the Lakes Leadership program contact Quita Sheehan at (715) 479-3646  mashee@co.vilas.wi.us , UW-Extension Lakes staff at (715)-346-2116,  uwexlakes@uwsp.edu  or visit their website  http://www4.uwsp.edu/cnr/uwexlakes/lakeleaders/ .

Nature’s water purifiers help clean up lakes

Posted on by david

Nature’s water purifiers help clean up lakes(Copyright: Floating Islands International)

More and more of our waterways are being starved of life through pollution. One simple, yet improbable, solution? Cover rafts in plants.

The solution was as simple as it was improbable: cover rafts with plants, and set them afloat in the lake. Within a year-and-a-half, the algal blooms were gone. Water clarity improved. Oxygen levels rose. Today, the lake is home to a thriving community of fish, including black crappie, yellow perchand Yellowstone cutthroat trout.

The story of Fish Fry Lake demonstrates the power of mimicking wetlands to clean up dirty waterways. Wetlands are sometimes called nature’s own water purifiers: as dirty water moves through a sprawling marsh, the bacteria that cling to wetland plants, timber, rocks, and other debris consume and process some common water pollutants. Other contaminants get trapped in the mud and muck. As result of these and other processes, the water that eventually flows out of a wetland is much cleaner than the stream that came trickling in.  Dozens of unique habitat models at fishiding.com

By creating floating treatment wetlands out of small, human-engineered rafts of vegetation, researchers and entrepreneurs hope to provide these same ecological services to small, polluted bodies of water that may be far from a natural marsh. “BioHaven floating islands are concentrated wetland systems that are essentially biomimicking nature’s wetland effect,” says Bruce Kania, the founder and research director of Floating Island International, the company behind the Fish Fry Lake rafts.

Cleansing power

To construct a BioHaven island, the company starts with layers of mesh made from recycled plastic. They assemble this mesh into a floating raft – which can be as small as a home aquarium or nearly as large as a football field – and top it with soil and plants. They launch the island into a lake, pond, stream, or lagoon, anchoring it in place. Over time, the plants’ roots grow into and through the raft’s porous matrix, descending into the water below. At the same time, bacteria colonise the island, assembling into sticky, slimy sheets called biofilm that coat the floating matrix and the suspended plant roots.

This bacterial biofilm is the secret to a floating island’s cleansing power. Overgrowth of algae from nitrogen and phosphorus pollution can cause several problems, preventing sunlight from reaching subaquatic plants and starving a body of water of the oxygen needed to sustain fish populations and other animal life. A dead zone, like the one is Fish Fry Lake, is often the ultimate result. The biofilm bacteria consume nitrogen and phosphorous, however, and as polluted water flows through and around a floating island, the bacteria converts these contaminants into less harmful substances. Though the bacteria do the brunt of the work, the plant roots suspended from the floating island also play their part, absorbing some of the nitrogen and phosphorous through their roots.

In Fish Fry Lake, for instance, Floating Island International deployed several islands, which together covered almost 2% of the lake’s 6.5-acre (2.6-hectare) surface area. Over the course of four years, the islands helped reduce nitrogen concentrations by 95% and phosphorus concentrations by nearly 40%. Today, levels of dissolved oxygen are sixty times what they once were.

Clearer, cleaner, healthier

The system also mechanically filters out other pollutants, like metals and particulates. “The sticky biofilm essentially keeps the water clear because all the suspended solids tend to bond to it,” says Kania. Floating Island International, which has deployed more than 4,400 of their artificial wetland systems worldwide, has documented this effect in multiple case studies. For example, the concentrations of suspended solids, copper, lead, zinc, and oil and grease fell dramatically after a floating island was installed in a stormwater pond in Montana. Controlled laboratory studies and research by scientists not affiliated with the company have also  foundthat floating treatment wetlands can reduce the levels of many common water pollutants.

Some scientists are now exploring how to optimise the design of floating islands – probing, for instance, which plants do the best job of removing pollutants. Gary Burtle, an aquaculture specialist at the University of Georgia, thinks we can get even more out of these artificial wetlands by seeding the rafts with plants that are of commercial value, such as lettuces and herbs. Burtle is screening a number of potential plant candidates – if he finds one that grows well on a floating island, we may soon see constructed wetland systems that “give us a little bit more return”, he says, producing saleable crops while purifying the water.

Meanwhile, the removal of contaminants not only improves the water itself, but also helps to foster a healthier ecosystem. Clearer water allows light to penetrate deeper, encouraging the growth of various aquatic plants, which produce oxygen and become part of the food chain, supporting larger populations of fish and other animals. “You end up with a waterway that can be abundant,” Kania says, “that can be verdant even at depth.” The organic debris that attaches itself to the underside of a floating island also becomes a source of food for fish and other aquatic organisms, and the island itself provides new habitat for birds.

“The concept of how to get back to a healthy waterway,” Kania says, “is very simple: nature’s wetland effect.” All we have to do is simulate it.

By: Emily Anthes bbc.com

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Project aims to bring more fish to Smith Mountain Lake

Posted on by david
Shallow cover for fry.
Standing on a bank at Smith Mountain Lake, Michael Forte watched as Appalachian Power workers on a barge lowered what looked like a wooden pyramid the size of a small refrigerator into the lake.

Forte, of Franklin County, designed it himself, and now the invention is part of an assortment of habitat devices that will be used to determine how to entice more fish into coves at the lake.

With the help of Internet research, Forte built a similar pyramid habitat and installed it under his boathouse a few years ago. He said it caused a “dramatic difference” in the number of fish swimming in his cove; today, there are dozens and dozens as opposed to very few.

“I just wanted to see if I could attract some fish,” he said. “And it worked.” See the dozens of unique habitat models at fishiding.com

The power company, which uses Smith Mountain and Leesville lakes to produce electricity through a two-reservoir hydroelectric generation dam, hopes to duplicate that kind of success in drawing fish to shallow water areas, said Liz Parcell, a plant manager.

Last week, workers lowered about a dozen similar fish habitat devices in areas shallower than 20 feet in the cove below the Discovery Center at Smith Mountain Lake State Park in Bedford County.

"The Cradle"
“Fine, dense cover for the smallest of fish.

Some of the habitat designs were natural collections of brush and twigs; others were man-made and included cinder blocks, wood pallets and various pipes.

“It’s kind of like a scientific project,” Parcell said.

Some designs resembled objects that might be seen in art galleries, but that will change over time, she said. (possibly the fishiding structures)“They’ll get covered in algae; they won’t look like this for long,” Parcell said. 

The goal is to study what designs work and then share that information with lake homeowners, who in turn could use it to create fish habitats of their own.

Next year, the Virginia Department of Game and Inland Fisheries will send scuba divers near the habitats placed in the water to gauge their effectiveness in drawing more fish, Parcell said.

The work is tied to the 30-year license renewal that the Federal Energy Regulatory Commission granted APCo in 2010, she said. The license, which the commission renewed after years of planning and debate among lake-area stakeholders, calls for a habitat-management plan and improved habitat along the shoreline.

Lake-area residents and landowners will have to obtain permits from the company before installing the habitats, Parcell said. APCo is working to have that process online, she said, and hopes to have it up and running soon.

“Hopefully, no one gets too excited too quickly,” she said.

By: JUSTIN FAULCONER | The News & Advance
LYNCHBURG, Va. —

Pond farming takes lead in fish supply

Posted on by david

 Pond farming has emerged as the biggest source of fish, thanks to a massive expansion of freshwater farming in the past two decades and a fall in fish catching from rivers and other open water bodies.

Fish from ponds and ditch now accounts for 41 percent of total yearly production of 30.61 lakh tonnes.

A decade ago, its contribution was 34 percent, according to the Department of Fisheries (DoF).

Contribution of fish caught from rivers fell to 34 percent in fiscal 2010-11.

Declining fish habitat, the ongoing destruction of juvenile fish by using monofilament synthetic nylon fibre net and mosquito net, and environmental pollution are the major reasons behind the falling supplies of fish from rivers.

“An increased production and availability of fingerlings and hatchlings because of growth in hatcheries has played a key role in expansion of fish farming,” said Krishnendu Saha, chief fisheries extension officer of the DoF.

Over the past two decades, private investors established more than 800 fish hatcheries.

Their interest grew due to a business prospect against the backdrop of falling catches in open water areas and rising demand for fish.

Initiatives by the government and NGOs to motivate farmers also facilitated farming for common carp, pangus, monosex tilapia and shing (cat fish) in regions such as Mymensingh, northern districts, Jessore and Comilla.

Saha said many people in these areas entered freshwater fish farming because common carps (ruhi, katla, silver carp), pangus and tilapia become marketable in a short time.

It enables the farmers to gain higher profit from fish than growing crops such as paddy and jute, he said.

“Many people in greater Mymensingh have started fish culturing by making ditches in crop fields,” said Saha.

According to the DoF data, total pond area under fish farming was 2.42 lakh hectares early this decade, and such areas rose to 3.96 lakh hectares in fiscal 2010-11.

Production also rose to 12.70 lakh tonnes in 2010-11 from 11.40 lakh tonnes a year ago.

In fiscal 1999-2000, total production of fish from pond was 5.61 lakh tonnes, according to the DoF.

Sajjad Hossain, managing director of Joyda Aquafarm Ltd, said many people are engaged in pangus farming because it needs low investment.

Technologies were also easy for the farmers to follow, said Hossain of Joyda, which produces pangus fries at hatcheries, cultures those and sells to market.

The company produces 2,500 tonnes of pangus a year, he said.

M Mahfujul Haque, a professor of the Department of Aquaculture of Bangladesh Agricultural University, said the country has a huge potential to expand fish farming as only 11 percent of its pond resources have so far been exploited for fish.

In the past, fish was cultured in ponds by collecting hatchlings from natural sources. But the main breakthrough came since the beginning of artificial propagation, he said.

“Large investments have come in fish farming and some farms have gone for vertical integration,” said Haque

He said expansion of fish farming created job opportunities for many and augmented incomes of farmers. Some 25 types of jobs have been created because of fish farming, he added.

“The socio-economic impact of fish farming is huge,” said Haque, adding that many educated people entered such a farming failing to get jobs in the formal sector.

However, challenges are increasing. See the dozens of unique artificial fish habitat models at fishiding.com, the leader in true fish protection.

“Fries are not growing fast nowadays like the past. Inbreeding is also widespread,” said Hossain of Joyda Aquafarm.

At the same time, productivity of ponds is declining because of continuous farming in the same ponds.

“But production costs are rising because of soaring feed prices and other costs. It reduces profit margins,” he said.Sohel Parvez

Floating treatment wetlands mitigate lake eutrophication

Posted on by david

By Mark Reinsel

ES&E Magaqzine’s May/June 2012 issue

An enhanced floating treatment wetland (FTW) that incorporates air diffuser technology is under evaluation in an ongoing study at Floating Island International in Montana. The latest-generation system lifts and circulates water through floating streambeds within the FTW. This combination of FTW and improved water circulation/aeration is part of a product range called BioHaven®. The primary objective of the study is to determine whether biofilm-based microbes can provide nutrient removal, while increasing fish productivity.

This system, which is a new type of
constructed wetland, has been evaluated
for treatment of agricultural effluent and
municipal wastewater. Cost-effective treatment options for end users with limited
funding will be its greatest benefit. It can
provide treatment of agricultural-impacted
waters, municipal wastewater, storm water
and polishing of tertiary waste water, along with lake restoration.

Fisheries managers will be especially interested in the productivity potential afforded by a biological system, which can reduce algae and grow more (and bigger) fish. See the dozens of unique artificial fish habitat models, fish attractors and fish cover at fishiding.com, the leader in proven science based, fish protection.

Wetland areas have been reduced worldwide, while nutrient loading has increased
with growing human populations. Mass-production agriculture, as practiced in many developed nations, can contribute to hyper-eutrophication in water bodies that were previously low in nutrient concentrations. In fresh water, partly as a result of normal seasonal stratification, nutrient loading can deplete oxygen levels within the livable temperature zone for fish species.


Over the last 11 years, Floating Island
International (FII) has developed the Bio-
Haven FTW technology, which mimics
the ability of natural peat-based wetlands
to purify water. The Leviathan™ extrapolates
this technology by maximizing surface area and circulation, which are key components of wetland effectiveness. The islands are also designed to provide
optimal perennial plant habitat.

System background:
Dissolved oxygen and temperature measurements taken on Fish Fry Lake,
FII’s 6.5-acre research lake in 2008/2009 indicated that stratified water near the
surface was too warm to sustain a trout fishery. While temperatures below the
stratified warm water layer were sufficiently cool for trout, that zone contained
low dissolved oxygen (DO) levels. During late summer, no strata of water could
consistently provide the cold-water, high- DO environment demanded by fish, such
as rainbow, brown and Yellowstone cutthroat trout.
Groundwater containing variable nutrient concentrations enters the lake at an estimated average rate of 18 m3/hr. Surface water also flows into the lake with variable nutrient concentrations and flow rates. Evaporative loss and outflow are balanced to maintain the lake level, which is approximately 9 m deep.

As the lake was filled several years
ago, a series of BioHaven floating islands
covering 5,200 square feet (480 m2) of
lake area and providing over 9.3 ha of saturated surface area was installed. Several
islands were positioned next to the inflow
to maximize exposure to the highest nutrient concentrations.

These islands were designed to maximize production of biofilm (organisms attached to underwater surfaces), and to move nutrients into and through the food web.
After addition of the last 232-m2 FTW, floating islands now cover approximately 715 m2, or 2.7% of the lake’s surface area. Active treatment system with floating streambed Leviathan is an enhanced form of constructed wetland, and is FII’s latest effort to move excess nutrients into the food chain or harvest them. It integrates high volume, low-pressure circulation with matrix surface area constructed of postconsumer (recycled) polymer fibers, for maximum wetland performance.

Air-driven directional diffusers circulate up to 2,300 m3/hr, pushing it through the Bio-
Haven matrix and plant roots. The system’s floating streambed contributes to aeration and nutrient uptake.


The FPZ-brand air diffusers require 3 hp (2.2 kW) to operate, typically with 230V
single-phase power. Leviathan is designed to provide the  complete “wetland effect,” including aerobic, anaerobic and anoxic microbial nutrient conversion. This allows it to treat large, nutrient-rich stratified bodies of water, including “dead zones,” in both freshwater and marine settings. Removal of ammonia, nitrate, phosphate and soluble organic carbon has been demonstrated.

The system can move nutrients from
any depth into and through the islands’
biologically active substrate. In the
process, these nutrients are digested by
beneficial microbes and form periphyton
(attached plant and animal organisms
embedded in a polysaccharide matrix,
similar to biofilm), which is the base of
the freshwater food chain. As these excess nutrients transition into the food chain via biofilm/periphyton, both water quality and fish growth rates can be dramatically improved.
Leviathan can de-stratify water bodies, resulting in greatly expanded habitable zones for targeted fish species. As part of this process, high DO levels can be achieved and maintained, and water temperatures homogenized.


Results:
A 232-m2 Leviathan system, incorporating floating streambeds and grid-powered water circulation, was installed in the lake in April 2009. This system circulated up to 770 m3/hr through the stream channels within the island. Each cubic meter of Leviathan’s matrix, averaging 0.64 m in thickness, provided 820 square meters of surface area.

After 17 months of operation, water clarity had improved from a low of 0.36 m of visibility to as much as 3.3 m. Clarity is now at 5.8 m. Simultaneously, the
water temperature gradient was reduced, creating a larger zone of “livable” water for fish. Two age classes of Yellowstone cutthroat trout were introduced 13 and 14 months into the test. Through the summer of 2010, a favorable temperature/dissolved oxygen strata, ranging from the water surface down to a depth of at least 3.7 m, was maintained as potential cutthroat trout habitat.


One-year-old and two-year-old black crappie were also introduced two months
into the test, and naturally-occurring northern yellow perch were present in the
lake when it was filled. All three species have flourished.

The new aeration scheme in the lake improves water quality by incorporating
dissolved phosphorus and nitrogen into the aquatic food web, in the form of periphyton,
while limiting the growth of deleterious algae. Total phosphate concentrations
are reduced from about 0.04 mg/L to 0.02 mg/L, while nitrate-nitrogen
concentrations decrease from about 0.6 mg/L to 0.01 mg/L.
Fish Fry Lake is relatively unique in that it supports fish accustomed to cold
water (Yellowstone cutthroat trout), temperate water (perch) and warm water
(crappie). Montana officials have made two unsuccessful attempts at sustaining
cutthroat populations in an adjacent stretch of the Yellowstone River.
Fish catch rates and growth rates are now being monitored at the lake. Initial
data show that experienced fishermen catch an average of one perch every two
minutes. Visual observations from diving and an underwater viewing station indicate
that perch approaching or exceeding the Montana state record of 1.0 kg now
inhabit the lake.
The perch harvest at Fish Fry Lake averaged 12 kg of fish per week from May-
November 2011. With a phosphorus content of 0.9% in perch, phosphorus removal
from the lake via fishing averaged 0.10 kg/wk, or 84% of the estimated
phosphorus input to the lake.
In summary, Fish Fry Lake was poised to become another eutrophic waterway, until a new form of applied stewardship was introduced, which reversed the process.

Mark Reinsel is with Apex Engineering.
E-mail: mark@apexengineering.us

Outdoors: A lesson learned

Posted on by david

Webster Lake weed kill devastates plant life.

Louie StoutOutdoors: Commentary

It was only couple of years ago when Lake Webster gamefish had plenty of habitat. ………..fish
See the dozens of unique artificial fish habitat models, fish attractors and fish cover used at fishiding.com, the leader in proven science based, fish protection.

Low cost inert substrates for growing bio film

Posted on by david
Fine PVC substrate for fry

At Fishiding.com we specialize in turning reclaimed PVC into long term products for fish habitat, nutrient removal and producing fish food. The amazing factor in this process is as Green as it gets, with no additional manufacturing or carbon footprint associated with our processes.

Our material comes to us through a network of suppliers, environmentally aware of the desire to keep this material out of landfills and put to good use. In this growing world, we as stewards of nature, must continue to find practical ways to re-use these post consumer products. Protection for aquatic life and growing it’s food, simultaneously, year round. Read below to see how it works, by the leaders in this technology to see if you need:  Floating Islands International,Inc. to give you a hand with your water quality questions and needs.

PVC fish attractor
Fishiding Safehouse fish habitat

Trading Nutrients for Fish by Bruce Kania (courtesy of Pond Boss magazine www.pondboss.com)

Fish productivity is enhanced by surface area.  When biofilms accumulate on substrate, excess nutrients in the water are used up as the biofilm grows.  This in turn feeds the food chain, and leads to bigger and more numerous fish.  Catching these fish represents a great way to remove phosphorus permanently from water.  Please scroll to page 10 to view the article.  Pond Boss magazine is dedicated to managing private waters for fish productivity

Fishiding.com offers products for many different applications in a vast array of sizes. Pieces ranging from 1/4″ wide up to full panels reaching 10″-12″ in width and as long as 12 feet. Many different shapes and textures of substrates for fish habitat as well as unlimited varieties of installation options for hatchery and aquaculture use. It all comes down to providing the correct amount and enough of surface area to handle the load of each individual waterway or volume of bio film needed. See the dozens of unique artificial fish habitat models, fish attractors and fish cover used at fishiding.com, the leader in proven science based, fish protection.

Safehouse,Stakeout and Cradle fish habitat
Varieties of Fishiding artificial fish habitat

By utilizing post consumer materials, the cost of these unique substrates runs far less than other manufactured products available. When sold in bulk shipments loose, these strands or limbs of textured PVC can cost pennies per square foot of surface area. Strands with or without holes are available to hang or tie groups of substrate sizes together.  Self contained and weighted, optional units come ready to bend to shape and toss in water, running slightly higher in price. Available pieces from stiff and rigid “sticks” to soft flexible strands in many colors, lengths and varieties.

Contact David to discuss your needs and receive a custom quote for your project. Shipped worldwide this new understanding of feeding your fish, creating habitat and purifying the water,  is gaining much deserved attention.

Stewardship starts with you, for future generations.

David@fishiding.com  815-693-0894

Texas Pro Lake Management and Fishiding.com Work Together to Improve Texas Fish Habitat

Posted on by david

We have been working for just a few months together, but it takes no time at all to be impressed with this Top notch management firm.

Texas Pro Lake Management located in Comanche Texas specializes in aeration and fountain installations, lake stocking, and lake management throughout Texas. Texas Pro Lake Management is owned by fisheries biologist Steven Bardin. In 2005 Steve started working on a Bachelors degree in Freshwater Biology from Tarleton State University in Stephenville, Texas.

 “I truly owe much of what I know about fish and pond management to Harrell and his 50 year experience he was willing to share with me.” In 2009, Steve completed his Bachelors degree and began pursuing a Masters degree in Fisheries Science under Dr. Masser at Texas A&M University.

See the dozens of unique artificial fish habitat models, fish attractors and fish cover used at fishiding.com, the leader in proven science based, fish protection.

Lake Management Services:

“It is important to take a proactive approach on the management of your lake. It is not usually the case that you stock the lake with fish and never need to further maintainence. Aquatic environments change making it imperative to pay close attention to the lake and see the signs of problems before they become to severe.”

Water Quality Analysis

Water quality is extremely important and monitoring certain parameters of water quality can be beneficial. If you have a water quality report and need help interpreting the results and would like recommendations please fill out the form below. If you would like to get a water quality sample analyzed it is easiest to send a sample to Texas AgriLife Extension Service. First download the waterweb1 form, follow the instructions for bottling, and mail the sample to the correct shipping address based on your carrier. In most cases sampling technique 1 is usually sufficient. If you have any questions please email steven@texasprolakemanagement.com or call.

Why is Aeration Needed?

Oxygen in lakes and ponds comes from two main sources; direct contact with the atmosphere and photosynthesis of phytoplankton. Usually these two processes can provide enough dissolved oxygen to maintain a healthy fish population, however during hot summer day’s lakes can become stratified. In a stratified lake the deep water below the thermocline becomes cooler, holds little to no oxygen, and does not mix with the surface water where oxygen is more abundant. To make matters worse, the loss of oxygen can cause carbon dioxide to build up and change the bacterial decomposers from aerobic to anaerobic organisms. The resulting byproducts of the new anaerobic decomposers are black muck and hydrogen sulfide.
Lake Stratification Diagram

The stratification of a lake becomes a problem when a cold front hits, or during a heavy thunderstorm. During these events the surface water cools and causes rapid mixing, which brings the toxic bottom water to the surface. The toxins can kill the zooplankton and fish, taking up even more oxygen. Depending on the severity of the turnover, fish may start dying from lack of oxygen. Usually, the oldest and largest fish die first.

If stratification has become extremely sever this oxygen shortage can happen overnight. As phytoplankton do not produce oxygen during night because of the lack of sunlight. If an oxygen shortage occurs over night usually the owner will see many dead fish with little to no signs of cause, as oxygen levels can become normal quickly after sunrise.

How Do We Aerate a Lake Properly?

To prevent stratification and low dissolved oxygen we can aerate the bottom water. Aeration is done by using compressed air to continuously move large volumes of low-oxygen water from the bottom to the surface of the lake. When the entire lake is oxygenated, fish are able to feed in the deep portions of the lake. This method of aeration reduces algal growth by reducing the release of nutrients from lake sediments. Benefits include improved water quality and clarity, prevention of fish kills and reduced occurrence of algae blooms, disease and odor.
Bottom Diffusion Aeration Diagram

All aeration systems from Texas Pro Lake Management will be custom designed for your lake. Many factors can determine the equipment needed for your situation and the overall cost of the system. Please contact me with any aeration questions, or sizing by phone or by email at steven@texasprolakemanagement.com

Fish Stocking:

Fish can be stocked throughout Central Texas at all times of the year with few exceptions for certain temerature sensitive species. Stocking your lake is the most rewarding and important decision when establishing your ecosystem. While it’s easy to get carried away and go straight to adding Gamefish, don’t forget to start with the basics and establish your bait fish. Often times, people are impressed with how quickly they are able to see a return on their investment when they take the time to establish their food chain appropriately from the beginning.

 

 

 

 

 

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