grass carp vegetation control – Aquarius-Systems

Restoring Native Aquatic Vegetation in Lake Conroe

Fri, 18 Aug 2023 20:18:27 +0000

Lake Conroe has a volatile history of aquatic vegetation management. Hydrilla infested the reservoir soon after the reservoir filled, resulting in coverage of approximately 10,000 acres by the early 1980’s. To control hydrilla, large numbers diploid grass carp were stocked. Grass carp not only controlled hydrilla, but also eliminated most other aquatic vegetation in the lake and continued to inhibit plant growth into the late 1990’s.

Identified as poor habitat for fish and other aquatic wildlife following loss of aquatic vegetation, efforts to re-establish native vegetation in Lake Conroe were initiated by Texas Parks and Wildlife Department (TPWD), the US Army Corps of Engineers Research and Development Center’s Lewisville Aquatic Ecosystem Research Facility (LAERF), and local stakeholders.

Grass Carp Control Hydrilla but Eliminate Vegetation in Smith Mountain Lake

Thu, 15 Sep 2022 15:33:12 +0000

In 2013, 6,000 sterile grass carp were introduced into Smith Mountain Lake, Virginia, to combat the growth of invasive aquatic vegetation such as hydrilla which has seen a massive growth around the lake.

When hydrilla was first discovered at the lake in 2007, a patch of the aquatic weeds were just a few acres in size. By 2013, multiple patches had been discovered that equaled nearly 200 acres.

Licensed herbicide applicators treated the weeds for several years until the grass carp were introduced. The herbicide was successful in killing off the hydrilla for a short time, but it would quickly grow back.

Unfortunately, the carp not only consumed their favorite food — the invasive hydrilla weeds that clogged coves and precluded safe swimming and boating — but after eating the hydrilla, they also consumed ALL vegetation in the lake.

Recent inspections in the lake do not indicate regrowth of non-native submerged aquatic vegetation.

Aquatic Vegetation Return Boosts Bass Habitat in Caney Lake

Fri, 04 Feb 2022 21:18:04 +0000

An examination of the Top Ten big bass ever caught in Louisiana reveals that six of the top ten fish were caught in Caney Lake, anchored by the state record 15.97 pound behemoth caught in 1994. A further examination of the top ten, however, reveal that none of these fish have been caught since the 1990s.

The fact that no top ten bass have been caught in Caney since the ‘90s points to a problem that occurred during that decade. Grass carp were introduced to the lake back then to control hydrilla and the carp basically removed virtually all the lake’s vegetation.

Now that grass is returning to the lake, forage fish like threadfin shad and bream have protection for reproduction and the bass that feed on them have been able to increase weights as they don’t have to move around as much to find plenty to eat.

Much of the returning grass is hydrilla, but there is another species of grass growing in Caney Lake now that offers potential as is provides aquatic cover for forage fish as well as predator species like largemouth bass; eel grass.