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Wood habitat in Table Rock rotting away after 50 years underwater

Posted on by david
This unusual barge can deposit several tons of rock into the lake to help create new fish habitat.

This unusual barge can deposit several tons of rock into the lake to help create new fish habitat. / Missouri Department of Conservation
Written by
David Casaletto
Executive Director, Ozarks Water Watch
The Missouri Department of Conservation uses this unusual barge to dump heavy rocks or tree stumps into Table Rock Lake to help improve fish habitat. MDC also uses a different 'fish habitat barge' to deposit trees and brush piles into the lake.

The Missouri Department of Conservation uses this unusual barge to dump heavy rocks or tree stumps into Table Rock Lake to help improve fish habitat. MDC also uses a different ‘fish habitat barge’ to deposit trees and brush piles into the lake. / Missouri Department of Conservation

Table Rock Lake is more than 50 years old.

When the lake was created, much of the Ozark forest was flooded, and the trees and brush provided cover for the lake’s fish populations. But after 50 years, most of that fish habitat has disappeared.

In 2007, the Table Rock Lake National Fish Habitat Initiative (NFHI) project began with the primary objective to improve fish habitat in Table Rock Lake. Additional goals include: Improve the water quality of Table Rock Lake and its tributaries, monitor the effectiveness and longevity of habitat structures, and develop a framework for a broader national habitat program.

Project partners include the Missouri Department of Conservation, Arkansas Game and Fish Commission, the National Fish and Wildlife Foundation, Bass Pro Shops, The U.S. Fish and Wildlife Service, the U.S. Army Corps of Engineers, Southwestern Power Administration, Ozarks Water Watch, Table Rock Lake Water Quality, James River Basin Partnership and other private groups and citizens.

To improve habitat, the Initiative project places cedar trees, hardwood treetops and recycled Christmas trees in the lake to create habitat with a “fish habitat barge.” The barge was built for this purpose by Tracker Marine in Lebanon, Mo. It is a large pontoon-style boat with a hydraulic lift on the front that raises and dumps the habitat into the lake.

Another barge called the “rock barge” is contracted to place larger (and heavier) habitat structure consisting of rocks, boulders and stumps. The state conservation department gets these materials from developers, contractors and landowners who are clearing land and need to dispose of them.

To date, 1,810 brush piles, 104 rock structures, 76 stump fields, 11 stump/rock combinations and 26 rock “fence” structures have been installed for a total of 2,027 new habitat structures in Table Rock Lake. These structures were placed in areas and depths that are available for fish during most of the year.

They have been located by positioning systems and can be found (and downloaded) on the department’s website at:http://newmdcgis.mdc.mo.gov/tablerock/. In addition, the department has placed green signs on the shoreline near some structures.

The Initiative also recognizes that water quality is a critical component of fish habitat. Funding has been contributed to the James River Basin Partnership, Table Rock Lake Water Quality and Ozarks Water Watch for cost sharing to homeowners to pump out septic tanks and replace failing septic systems.

These water quality organizations have combined over the past five years to pump out more than 2 million gallons of septic effluent and replace more than 100 failing septic systems.

All participants receive a packet of water quality educational materials and septic system maintenance information. Funds are still available to share the cost for pumpouts and for replacing failing septic systems.

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.

To monitor and evaluate the Initiative structures that have been placed in Table Rock Lake, the state conservation department has designated four evaluation techniques: fish sampling, Scuba observations, an angler survey and a black bass biotelemetry study.

By monitoring fish use of the habitat structures, the department is learning what techniques and designs work best for placing habitat during the remainder of the Initiative project and in other lakes in Missouri. Information gathered from the evaluation will allow the department to share ideas and techniques with other state agencies that are working to improve fish habitat in reservoirs.

By all accounts, this is a success story, but is that area going to be loaded with fish? Will a fisherman always be able to find fish off those trees? The only way to find out is to get out there and fish those areas. And the only way for biologists to know if the project is working is if anglers let them know.

Visitthe Missouri Department of Conservation websiteand download the GPS points, print off a map and go fish.

Fish love Snags and snags create habitat

Posted on by david

Re-snagging the Goulburn to increase native fish habitat and improve recreational fishing opportunities between Seymour and Nagambie.

The Goulburn Broken Catchment Management Authority (CMA) is working along the Goulburn River between Seymour and Nagambie in the coming weeks to increase the amount of large woody habitat, or snags, in the Goulburn River, with the aim to increase in the native fish population and diversity in this section of the river.

Funded by the Victorian Government, through revenue from Recreational Fishing Licenses to improve recreational fishing in Victoria and the Goulburn Broken CMA, the snags are being placed in the Goulburn River, downstream of the Hume Freeway Bridge near Seymour. The works that are being carried out will lead to an increase in habitat for native fish in the area and an improvement in catch rates for recreational fishers.

Goulburn Broken CMA River Health Projects Coordinator, Mr Jim Castles explains, “Native fish rely heavily upon instream habitat such as tree roots, logs and branches called ‘snags’. Since European settlement, our streams and rivers have been de-snagged, in the belief this would increase water flow and quality. We now know this is not the case.”

Native fish ecologists from the Murray Darling Basin Authority estimate that fish populations have declined by 90% since European settlement. There have been many threats to native fish including removal of in-stream and riparian habitat and flow modification.

Snags are the inland equivalent of coastal reefs and provide habitat for native fish and other animals such as tortoises and native water rats. Native fish use them to shelter from fast currents and sunlight and take refuge from predation. Native fish also use snags as feeding and spawning sites, and as nursery areas for juvenile fish.

Recent fish surveys within the Murray Darling Basin have found that 80% of Murray Cod are found within 1 metre of a snag. All large bodied freshwater native fish use snags as habitat.

“Re-snagging is a sound management intervention we can use to restore native fish habitat to our waterways, and results so far suggest that native fish populations respond strongly as a result. Re snagging on its own, however, is unlikely to be the sole driver in native fish recovery in the Goulburn River. The key is to better manage our riparian zones by fencing to restrict stock access and protect native vegetation, and revegetating degraded areas so there will be a constant natural supply of snags in the future” says Mr. Castles. See the dozens of unique artificial fish habitat models, fish attractors and fish cover used at fishiding.com, the leader in  science based, proven, fish protection.

The areas to be re-snagged have been identified via in-stream habitat mapping undertaken in 2011 by scientists from the Arthur Rylah Institute (ARI) in the Goulburn River between the Mitchellstown and Hume Freeway Bridges to identify areas that have a low density of snags. The sites where the Goulburn CMA carry out re-snagging are being selected based on priority zones identified by ARI as a result of this mapping, and access to the waterway within these zones.

The fallen trees used for the re-snagging project have been sourced from a number of nearby locations, including the Nagambie Bypass and a public reserve in Seymour. The Goulburn Broken CMA and its contractors work to rigorous guidelines that have been developed in other locations where re-snagging has been carried out over many years.

“The snags will be secured safely and positioned in a way that does not block the river channel to ensure fishing boats can still travel along the river,” explains Mr Castles “The snags will have very little or no net impact on water flow and will enhance native fish habitat, thereby leading to a more robust native fish community, which will result in huge benefits for recreational fishers in our region.”

This project is funded by the Department of Primary Industries Recreational Fishing Licence Grants Scheme, which uses revenue raised from the sale of recreational fishing licences to fund projects that directly improve recreational fishing in Victoria.

Snags on the riverbank prior to placement. Photo: Jim Castles, Goulburn Broken CMA

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