Exotic Aquatics Invade Texas Waters – Texas Parks and Wildlife [Official]


[music] It is a global issue. I think inevitably
we are going to see more and more exotic
species showing up. [music] BY DEFINITION, EXOTIC SPECIES
DON’T BELONG HERE. OFTEN, THEY DISPLACE THE PLANTS
AND ANIMALS THAT DO. For the U.S. economy we spend
over $100 billion a year just trying to control the impact
of exotic species. [music] SAN FELIPE CREEK IN DEL RIO IS FED BY SOME OF THE LARGEST
SPRINGS IN THE STATE. AND IT HAS AN EQUALLY
LARGE PROBLEM. THE CREEK IS BEING INVADED BY
A SOUTH AMERICAN CATFISH. [Biologist] The sucker-mouth catfish
have really taken over. What do you want on your salad? Cabbage, zucchini, cucumbers? THESE BIOLOGISTS HAVEN’T
COME HERE TO EAT. Pressed algae, and fish meal… LUCKILY, …and a few other things. THE FOOD IS FOR THE FISH. Phew! They stink! [music] THIS EXOTIC SALAD BAR… …the algal pellets and spinach… …IS BEING TESTED AS FISH BAIT TO TRAP AND REMOVE
THE EXOTIC FISH. That’s good, we’ve got it on
the bottom. It’s set good here. This population basically
went exponential, literally hundreds of thousands
of fish here. More than any other
fish in this creek, maybe more than all the
other fish put together. We’ll have to lift over these
rocks a little bit. THIS HAS BIOLOGISTS CONCERNED
FOR THE ENTIRE ECOSYSTEM. [Garrett] We’ve seen a lot of the
native species decline. [kid] He doesn’t bite? They’re obviously being
hurt by this fish. [kid] He looks kind of scary. They’re a common aquarium fish.
They’re algae eaters, which is the base of
the food chain. YOU SEE, THIS FISH DIDN’T
GET HERE BY ITSELF. LIKE SO MANY PROBLEMS WITH EXOTIC SPECIES, THIS ONE LIKELY BEGAN WITH SOME
WELL-INTENTIONED PEOPLE. [Garrett] They raise these fish
in their aquariums. They become very attached
to them. But they just don’t understand
when you put this thing that’s in your aquarium into
our natural environment, you’re harming a lot of
other things. [music] FEW HAVE A BETTER WINDOW
ON THE THREATS OF EXOTIC AQUATIC
ORGANISMS THAN THE AQUARIUM STAFF
AT THE HOUSTON ZOO. [curator] We want to be able to
provide an educational message to the public and also to protect our
native resources. We need to have that
public buy-in and then the state doesn’t
have to worry about invasive species being dumped
into the waterways. [presenter] These are red piranha, also known as red-bellied piranha. ONE EXHIBIT ALWAYS
DRAWS A CROWD… [kid] Oh, he got it! …ESPECIALLY AT FEEDING TIME. [presenter] They are illegal to own
down here in Texas. PERHAPS THE SCARIEST THING
ABOUT THESE FISH IS THAT THEY CAME FROM
THE PET TRADE. These were actually confiscated. IN FACT, THE AQUARIUM HOUSES
ALL SORTS OF EXOTIC CREATURES INTERCEPTED BY LAW ENFORCEMENT. [Brandy] We can take those animals in and then turn that into an
educational message. Piranhas, freshwater stingrays, the stonefish, animals that are not native have the potential to out-compete
our native wildlife and so we would not want them to get established here
in the state of Texas. [foghorn] FROM GLOBAL SHIPPING, THE PET TRADE, AQUACULTURE OR THE
LIVE SEAFOOD MARKET, NON-NATIVE SPECIES CAN
BE INTRODUCED AND, AWAY FROM NATURAL
PREDATORS, CAN INVADE. VORACIOUS ASIAN SNAKEHEADS HAVE APPEARED IN EASTERN WATERS. ZEBRA MUSSELS ENCRUST
THE GREAT LAKES AND MISSISSIPPI BASIN AND MITTEN CRABS, WHICH CAN
CARRY A DANGEROUS PARASITE, HAVE INVADED THE WEST COAST AND ELSEWHERE. ESTIMATES OF EXOTIC PLANTS
AND ANIMALS IN THE U.S. EXCEED 50,000 SPECIES AND THE PROBLEM IS
WORLDWIDE. [Lance Robinson] It is global. Other countries are working to
stem the tide of exotics coming into their countries, just like here in the
United States. WHILE LANCE ROBINSON DIDN’T WRITE THE BOOK ON INVASIVE SPECIES, HE KEEPS WELL-INFORMED
ABOUT THEM TO SAFEGUARD FISHING ON
THE TEXAS COAST. [Robinson] Fisheries are an
economic value to our state in the billions of dollars. [Biologist] There’s a redfish. We monitor everything that we
collect in our sample gear, looking to see if there are
exotics showing up. But we can always use the public
as they encounter something, letting us know what
they have found. [student] I don’t see any
over here. There’s 2 more here. Our work kind of goes at
a snail’s pace. They had just recently
become a problem. Everyone was kind of in a panic. They didn’t really know what to
do with them or what they were. WHILE A STUDENT AT
SOUTHWESTERN UNIVERSITY, REBECCA MARFURT BECAME CURIOUS
ABOUT AN EXOTIC SNAIL BEING SEEN IN THE BAYOUS
OF SUBURBAN HOUSTON. [Professor] These snails are exotic
invasive species, meaning that they don’t belong here
and they spread, which is sort of a double whammy. It’s not a good thing for
the environment. -Let’s see what we can find.
-Let’s go left. ONE STUDENT’S CURIOSITY HAS LED
TO YEARS OF RESEARCH PROJECTS FOR PROFESSOR ROMI BURKS’ BIOLOGY CLASSES. Whoa! Snail!
Got one! Got it! It’s a big one. We’ll take this one back to the lab. They’re called applesnails because
they’re about the size of an apple. Oooh, nice one. There’s very little information in the
scientific literature about this species. AND SO THE CLASS IS COLLECTING
ADULT APPLESNAILS… Another one! …AND THEIR LARGE PINK EGG CLUSTERS TO LEARN MORE ABOUT THESE CREATURES AND THE THREATS THEY MAY POSE. We’ve seen egg clutches, as many as
4- or 5,000 eggs almost. That’s a lot of snails from just one. Good catch! This is a big egg clutch. Make an omelette. Hot pink omelette. [Burks] The ones we’re studying,
insularum, actually eat plants. They’re gaining attention as a possible
threat to Texas Wild Rice as well as agricultural rice. [student] It’s 39.30. [Burks] We’re going to do
some experiments where we look at whether adult snails,
fish, or crayfish would eat the eggs. It’s very important to understand how
many of those eggs actually end up as snails later on. ULTIMATELY, RESEARCH DONE BY
THESE STUDENTS MAY BE THE KEY TO KEEPING THESE
INVASIVE SNAILS FROM BEING A MAJOR THREAT, ECONOMICALLY OR ECOLOGICALLY. We know a lot more now than
we just did 6 months ago. I still remain worried. They’re not going to go away. There’s unlimited questions from a research and even teaching
standpoint with students that I don’t think I’ll
ever be bored. BACK AT SAN FELIPE SPRINGS, THE BAITED TRAPS HAVE
HAD 24 HOURS TO CATCH SUCKERMOUTH
CATFISH. Not just loaded, but it’s some. ….4, 5, 6, 7 THE BIOLOGISTS LEARN
WHAT WORKED… Algal pellets. 11, 12…14… …AND, WHAT DIDN’T. A Diamondback water snake. That’s too bad. ADJUSTMENTS WILL BE MADE TO
BETTER TARGET THE FISH BUT THERE IS SOME HOPEFUL NEWS. We caught about 45. Some baits actually do work
better than others. Once we get the methods resolved then we’ll really go after
this population. Each exotic has its own
suite of problems and its own set of challenges
it presents us to try and control them. PLANTS AND ANIMALS THAT
DON’T BELONG HERE CAN THREATEN THOSE THAT DO. It’s an important issue that we
all have to be aware of. It’s not going away. IN THE ONGOING BATTLE AGAINST
EXOTIC AQUATIC SPECIES, AWARENESS IS OUR
BEST DEFENSE. I think education has got to be at
the front to stem the tide of exotic species introductions. BUT PERSISTENCE IS OUR
BEST HOPE. The easiest thing to do
is just give up. We’re going to keep pounding
away at this one until either we get it resolved or we are assured there’s
absolutely nothing we can do. Hopefully it will be the former
and not the latter. [music]

Comments 7

  • Por desgracia el problema de las especies invasoras es algo estendido por todo el mundo y muy dificil de solucionar.

  • CRAWFISH

  • i live in dwl rio ive spear fished and bowfished ill keep it up and please help the talipia

  • Apple Snail Info:
    http://applesnail.net/forum3/viewtopic.php?f=12&t=1945

    Plecostomus "Suckermouth Catfish"– Plecos taste great. They are very
    good eating fish and are worth pursuing and using as food. Many recipes
    & articles exist on the internet about their tablefare qualities.
    TPWD ought to consider promoting them to the public as a very edible
    fish species. Hopefully this could be used as just one more tool to help
    curb their numbers.
    How to clean a Pleco (Plecostomus) Armored Catfish
    https://www.youtube.com/watch?v=3DpVWVit9OY
    Preparing Pleco for Cooking
    https://www.youtube.com/watch?v=U5xwo26pIhA

  • Algae eating fish, what's the matter with that?

  • The info about the sol called sucker mouth catfish is wrong these guys are morons it’s not a catfish it’s a pleco

  • A alge eating suckerfish ok not a cat fish at all it’s a pleco

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