Archive for the 'Giant Salvinia' Category

Eradicating Giant Salvinia

Thursday, July 25th, 2019
Warning sign about Giant Salvinia.

Warning sign about Giant Salvinia.

This is Passport to Texas

In the 1958 movie The Blob, an ever-expanding goo from outer space threatened humankind. Today, Texas lakes are being invaded by a “blob” of a sort called Giant Salvinia: a floating aquatic fern that can double in size every seven to ten days.

In order to control it we have to be able to get on it early.

John Findeisen is a Natural Resources Specialist at Parks and Wildlife. His Aquatic Habitat Enhancement team is working to contain and eradicate Giant Salvinia.

We’ve starting using a lot more floating booms to keep it contained. We’ve found that if you can keep it contained then your chances of eradicating the plant are a lot easier.

Floating containment booms along with targeted herbicide treatments and freezing temperatures helped John’s team eradicate the plant from Lake Fork and Lake Athens in East Texas. But Giant Salvinia remains a threat.

The threat always remains. What we need to do is to get the recreational boaters, our angler, as well as our duck hunters to make sure that you clean, drain and dry. Clean out everything you have. Clean your boat, the trailer, the motor. When you find that stuff pull it off, throw it in a trash can or onto the ground where it’ll dry up and die.

Help stop the Giant Salvinia blob. Remember to clean, drain… and dry.

The Sport Fish Restoration Program supports our series.

For Texas Parks and Wildlife…I’m Cecilia Nasti.

Giant Salvinia–A Real Life Alien Invader

Wednesday, July 24th, 2019
A handful of Giant Salvinia.

A handful of Giant Salvinia.

This is Passport to Texas

People of a certain age recall the arcade game Space Invaders. It was fun and pretend. Today Giant Salvinia is a not so fun, real-life alien invader found in Texas Lakes.

Giant Salvinia is from South America originally and it came to the United States through the aquatic gardening and the aquarium industry.

Natural Resources Specialist, John Findeisen, leads the Aquatic Habitat Enhancement Team at TPW.

It’s a floating aquatic fern. It appears to have a root but what looks like a root is nothing more than a modified leaf. It does go through very, very rapid vegetative reproduction where it replicates itself. If it gets cut in half each one of those halves will become a new plant.

This invasive alien plant cuts off sunlight to submersed aquatic vegetation which is a key ingredient in sustaining aquatic life.

Once you start losing that habitat, native life is just going to leave. In addition to that we’re not getting the production of oxygen into the water column itself. So basically, it’s an aquatic desert.

The Giant Salvinia threat to lakes is real. Boaters: always clean, drain and dry all watercraft and equipment before leaving the boat ramp. Transporting Giant Salvinia, or any invasive species, is prohibited by law.

The Sport Fish Restoration Program Supports our Series.

For Texas Parks and Wildlife…I’m Cecilia Nasti.

Help Halt Aquatic Invasive Species

Wednesday, July 26th, 2017

This is Passport to Texas

You know how Smokey Bear says:

[Smokey Bear] Remember: only you can prevent forest fires.

He’s reminding us of our personal responsibility when we’re outdoors. It’s as true on the water as it is on the land.

Aquatic invasive species can quickly infect water bodies unless we take preventive measures. With summer boating season underway, Texas Parks and Wildlife asks boaters to help to stop the spread giant salvinia and zebra mussels which can travel from lake to lake on boats and trailers.

Boaters: “Clean, Drain and Dry” you boats, trailers, and gear every time you travel from one waterbody to another. A video on the TPW YouTube channel demonstrates the proper steps.

First, inspect the boat, trailer and gear. Clean off any vegetation, mud or foreign objects that you find. Second, pull the plug and drain all the water from the boat, including the motor, the bilge, live wells, and bait buckets before leaving the lake. Third, open all compartments and live wells and allow your boat, trailer and gear to completely dry for a week or more before entering another water body.

For complete instructions on how to clean, drain and dry your boat and trailer to prevent the spread of aquatic invasive species, go to

The Sportfish Restoration Program Supports our series.

For Texas Parks and Wildlife, I’m Cecilia Nasti.

More Funding to Fight Invasive Species

Friday, May 13th, 2016
Aquatic imvasives

Aquatic imvasives

This is Passport to Texas

Record funding approved by the Texas Legislature is launching new fronts in the war on aquatic invasive species.

With $6.6 million dollars in appropriations, this year and next, Texas Parks and Wildlife will ramp up an unprecedented effort to control and stop the spread of aquatic invasive plants and creatures.

Some of the aquatic invasive species that will receive the agency’s attention include: giant salvinia and zebra mussels covering Texas lakes, to giant reed and salt cedar smothering rivers and streams, to exotic fish that compete with Texas natives and alter natural ecosystems.

One major category of work is Aquatic Invasive Plant Management—projects focused on management of aquatic invasive plants on public waters to enhance boater access for recreation, and management of riparian invasive plants in target areas to improve water quality and quantity.

In Texas, the economic impacts of aquatic invasives are far-reaching, costing the state billions of dollars annually, including threatening to undermine a recreational freshwater fishing industry worth more than $4 billion-dollars.

That’s our show. The Texas Parks and Wildlife Foundation supports our series and helps keep Texas wild with support of proud members across the state. Find out more at

For Texas Parks and Wildlife…I’m Cecilia Nasti

Flooding and Aquatic Invasive Species

Thursday, August 20th, 2015
Zebra Mussels

Zebra Mussels

This is Passport to Texas

Texas lakes and rivers are full and flowing again thanks to an influx of water brought on by heavy spring rains. The downside is we could see the spread of invasive species as a result.

06- We always have to be vigilant about invasive species: zebra mussels…giant salvinia…water hyacinths…

Inland fisheries’ Dave Terre says improved water levels and boat ramp accessibility means more boaters on the water. He adds everyone must do what is in their control to prevent the spread of these species.

09- Make sure that you clean your boats and trailers; and dry your boats–and drain your boats–before going onto other water bodies. It’s the law.

Cleaning, draining and drying boats–that’s within our control. Mother Nature is not. When she soaked Texas, it’s possible she also flushed zebra mussels downstream.

25- Certainly, we’ll be monitoring that situation through time, but at this point it’s really unknown what impact these floods will have on the spread of zebra mussels across our state. But, anglers and boaters still need to be mindful about spreading these species by boat. [Clean, drain & dry] is the one thing we do have control over, and one thing that we can do. We’re always concerned about invasive species trying to keep them out of our water bodies. So we need to control what we can control.

Find information about invasive species at

The Sport Fish Restoration program supports our series.

For Texas Parks and Wildlife, I’m Cecilia Nasti.