Jaymi Heibuch 3/22/16. Mother Nature
Network
Over the last few decades, Florida 's invasive
Burmese python problem has grown at a startling rate. The pythons, released
either by accident or on purpose, have gained a foothold in the state and
researchers are scrambling to find ways to minimize the damage they're causing.
In its native range in Southeast Asia , the future of the species is
questionable. The IUCN lists it as vulnerable to extinction. Yet in Florida , the non-native
snakes are flourishing and causing the population of many native species, from
birds to mammals, to plummet.
A study published last year by scientists from the University
of Florida ,
the U.S. Geological Survey and the Florida Fish and Wildlife Conservation
Commission showed that pythons devoured 77 percent of the marsh rabbits tracked
by the researchers. It was proof positive that the dramatic decline in marsh
rabbits is due to the presence of invasive pythons. Researchers also suspect
pythons are behind a decrease in deer populations.
Not only are the pythons responsible for
decimating prey populations, but they're also outcompeting native predator
species. The effect the snakes have on the ecological balance of Florida 's wilderness
can't really be understated, and it's a growing problem.
"Recent research has suggested that
the predation pressure exerted by these pythons is unsustainable and causing
big declines in native mammal populations. I see these declines in native
animals as the biggest problem caused by the Burmese pythons," Dr. David
Steen of Auburn University
told MNN.
As part of the response to the problem,
researchers launched the Python Challenge. The event both raises public awareness about the
problem and also gives researchers a chance to learn about the species.
This year, a Python Challenge in Collier
County
collected more than 2,000 pounds of snakes in three months in just that county.
One of the snakes was a male measuring 16 feet long and weighing 140 pounds,
which set a new state record for size. The researchers participating in the
challenge — including Ian Bartoszek from Conservancy of Southwest Florida, Paul
Andreadis from Denison University, and staff from the Rookery Bay National
Estuarine Research Reserve and the United States Geological Survey — used a
strategy that is not only clever for catching more snakes but also revealed
previously unknown behavior.
Fitting male pythons with radio trackers,
the researchers essentially turned them into "snitch snakes" that
they could follow during the breeding season.
"Pythons, and snakes in general, are
very hard to find because they are highly camouflaged and don’t need to move
around as much as warm-blooded animals," explains Steen. "So, by
following one snake during the breeding season it is likely that you’ll be able
to come across many others that you never would have found otherwise."
And the researchers certainly did. They
could track the males to females, and they note that finding a pregnant female
before she lays eggs can help make at least a dent in the year's population of
pythons.
"It’s not like I’m waving a flag and
declaring victory. But we’ve removed over 2,000 pounds of snakes from a fairly
localized area,” Bartoszek told the Miami Herald. "Through active searching and radio telemetry, one
little snake busted up multiple breeding aggregations."
Though the strategy may not signal the
end of the python problem, it does signal progress.
Steen echoes this: "I do not think
that we currently have the knowledge or the technology to eradicate pythons
from Florida .
But, this is an area of active research; what if someone were to develop a trap
that uses chemical signaling? That could potentially be the trick to making a
dent in their numbers."
To learn more about Florida 's major python problem, check out
this video from PBS Nature:
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