Passport to Texas

This is Passport to Texas

Giant Salvinia is a fast growing exotic aquatic plant from South America that loves the warm, nutrient rich environment of Texas’ protected waters. This invasive species develops into large floating mats of vegetation.

The water under the mat is quickly depleted of dissolved oxygen due to the lack of sunlight and contact with the air’s surface; it becomes highly acidic and basically unfit for aquatic life.

Howard Elder is an aquatic habitat biologist. Giant Salvinia can be controlled in small areas using integrated pest management.

We can only conduct herbicide operations during the warmer months when the plant is actually growing.

In South America, where Giant Salvinia is native, natural processes, including a weevil, control the plant’s growth.

We have investigated this Giant Salvinia weevil, as we call it, as a bio-control agent. And research began in 2002 after the USDA approved its importation and use and distribution in the field within the United States. The initial results of Giant Salvinia weevil introduction offers great promise as a long-term inexpensive alternative in the control of Giant Salvinia infestations in Texas and throughout the South.

That’s our show… made possible by the Sport Fish and Wildlife Restoration Program…working to eradicate invasive species from Texas waters.

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

Managing Giant Salvinia Play Now | Play in Popup | Download

This is Passport to Texas

For more than a decade, researchers at the Heart of the Hills Fisheries Science Center in Kerrville have battled the hybrid progeny of Guadalupe bass—the state fish of Texas—and the introduced Smallmouth bass.

We’re raising thousands of pure Guadalupe bass here at the research station. And every year we stock them back into nature. Basically, what we’re doing is replacing the hybrids that are out there with these pure Guadalupe bass. And we’ll let nature take its course form there.

That’s Gary Garrett, who initiated the Guadalupe bass recovery program. The fish exists only in the Texas Hill Country—in the headwaters of streams that drain the Edward’s Plateau.

Shortly after non-native smallmouth bass were introduced to Texas waters, they bred with native bass, resulting in an explosion of hybrids. But using a technique called “saturation stocking,” Garrett and his crew have made exceptional progress.

So far we’re seeing here in Johnson Creek, where we began eh study, we started where 30 percent of the fish were hybrids. And that wasn’t stable—it was still increasing when we started. It is now down to around three percent. Which is excellent! Top go from thirty to three is great. Now we want to go from three to zero.

And Garrett expects to reach zero in the next four to five years.

That’s our show… we receive support from the SF Restoration program…For Texas Parks and Wildlife…I’m Cecilia Nasti.

Guadalupe Bass--Solving the Hybrid Problem Play Now | Play in Popup | Download

This is Passport to Texas

Some ideas seem good when you first have them. Then after some time passes—not so much. Take smallmouth bass, for example, and their effect on the Guadalupe bass population.

Small mouth bass, of course, are not native to Texas, but were brought in as an additional sport fish. The problem is they can’t tell each other apart. Even though they look very different, but evidently, they act similar enough behaviorally that they’ll reproduce—and they have hybrids.

That’s Gary Garrett, Director of the Watershed Conservation Program. So, what’s wrong with hybrids, anyway?

Hybrids, by definition, are halfway between the parents. So, they’re not as well adapted for their environment; they may do well in the short run, but in the long haul, they’re really not going to be as good a species.

Besides, they’re the state fish of Texas, occurring only in the Hill Country. And, well, you just don’t mess with Texas.

The other thing we’re now seeing a little bit is that these hybrids are now also crossing with our largemouth bass…which is yet another problem we want to avoid.

And you definitely don’t mess with largemouth bass. But, we’ve started to turn the tide on these hybrids with saturation stocking.

And we’re confident that in the next four or five years we’re going to be able to solve this problem.

That’s our show… we receive support from the SF Restoration program…For Texas Parks and Wildlife…I’m Cecilia Nasti.

Guadalupe Bass--A Hybrid Problem Play Now | Play in Popup | Download

This is Passport to Texas

As more people move from the country to the city, large tracts of farm and ranch land are being divided into smaller parcels to accommodate urban dwellers’ need for rural retreats.

More and more of our land is being fragmented and broken up. And so, small acreage land holdings are more common, especially in the eastern half of the state. You know, we’re talking fifty acres to two hundred acres.

Linda Campbell directs the private lands program at Texas Parks and Wildlife. Because habitat fragmentation negatively impacts wildlife, neighboring landowners are encouraged to work together to lessen the problem.

We encourage landowners to join with their neighbors in what are called landowner cooperatives, or wildlife management associations. They’re becoming much more common, and landowners working together can get a lot more done for wildlife; they impact more habitat when they work together. And they can accomplish common goals. And, so, we very much encourage and work with groups of landowners to develop these landowner driven cooperatives.

Visit the Texas Parks and Wildlife web site for complete details on how landowner cooperatives can receive free, confidential technical assistance.

That’s our show…we receive support from the Wildlife Restoration program

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

Recreational Landowners: Wildlife Management Associations Play Now | Play in Popup | Download

This is Passport to Texas

The best time to get to know your land is when you first buy it.

Walk it; look at it carefully. Study it over the seasons. Really find out what makes it tick. And, that’s the first step – to really understand the land – and then understand the management that it takes to achieve the kind of goals you want for your recreation.

Linda Campbell directs the private lands program at Parks and Wildlife, from which landowners receive help with their management goals. She recommends getting started by visiting the workshop calendar – in the private lands section – on the TPWD website.

These are workshops and field days and things of that nature that occur all over the state. And so I would suggest landowners take a look at that.

Attending these events allows landowners to get to know other like-minded people in their region. The agency also offers free on site technical assistance in wildlife management planning.

And so, we look at the entire picture – all the habitats that are there, what can be done, what are the landowners goals, and then we help them develop a plan that will help them achieve that.

Tomorrow, joining with adjacent landowners to form a wildlife management association.

That’s our show. We receive support from the Wildlife Restoration program.

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

Recreational Landowners: Knowing Your Land Play Now | Play in Popup | Download