Time to stop sniggering?...
Maybe the feral pig problem isn't just redneck reality show fodder. Maybe it's something we should take a little more seriously.
In southern states like Texas, backyard encounters with feral swine have
become routine. The pigs — ill-tempered eating machines weighing 200
pounds or more — roam city streets, collide with cars, root up
cemeteries and provide plot lines for reality TV shows like “Hog
Hunters.”
But the pig wars are moving north. In Michigan, New Hampshire, New York,
North Dakota, Ohio, Oregon and Pennsylvania — states where not long ago
the only pigs were of the “Charlotte’s Web” variety — state officials
are scrambling to deal with an invasion of roaming behemoths that
rototill fields, dig up lawns, decimate wetlands, kill livestock, spread
diseases like pseudo-rabies and, occasionally, attack humans.
In 1990, fewer than two million wild pigs inhabited 20 states, according
to John J. Mayer, the manager of the environmental science group at the
Savannah River National Laboratory
in Aiken, S.C., who tracked the state populations. That number has now
risen to six million, with sightings in 47 states and established
populations in 38 — “a national explosion of pigs,” as Dr. Mayer put it.
The swine are thought to have spread largely after escaping from private
shooting preserves and during illegal transport by hunters across state
lines. Experts on invasive species
estimate that they are responsible for more than $1.5 billion in annual
agricultural damage alone, amounting in 2007 to $300 per pig. The
Agriculture Department is so concerned that it has requested an
additional $20 million in 2014 for its Wildlife Services program to address the issue.
There is wide agreement that the pigs are undesirable — like the Asian
carp that is threatening to invade the Great Lakes, but far bigger,
meaner and mounted on four legs. But efforts to eradicate or at least
contain them have been hampered by the lack of a national policy to deal
with invasive species as a whole, the slowness of states to recognize
the problem and the bickering between agencies about who is responsible
for dealing with them.
“As a nation, we have not thought through this invasive species problem,
and we just have disaster after disaster after disaster,” said Patrick
Rusz, the director of wildlife services at the Michigan Wildlife Conservancy.
Dr. Rusz, who travels around the state educating farmers about the
menace posed by the wild pigs and encouraging them to set traps on their
land, is so avid a hog-hater that in the early stages of Michigan’s
invasion, he went to bars to eavesdrop on hunters who might have spotted
the porcine invaders. [More]
What woke me up was mentioning Michigan - not some southern swamp. If they are breeding up there, it wouldn't take much for Illinois to enjoy this pest.
The wild pigs’ destructive feeding behavior poses a particular threat
to sensitive wildlife species and their habitats. According to studies
by researchers at Texas A&M University, wetlands and riparian areas
suffer the most damage from wild pigs. In some areas, nearly 50 percent
of the habitat is significantly degraded by the hogs’ rooting and
wallowing. Additionally, these wet areas also are experiencing increased
bacterial contamination in the form of E. coli and fecal coliform from the ever-present pigs.
“Hogs are deadly to anything that nests on the ground,” stated West.
“One of the best examples is the depredation of sea turtle eggs on
Ossabaw Island.” Before the Georgia Department of Natural Resources
(GDNR) began an intensive wild pig removal program on Ossabaw, a barrier
island south of Savannah, sea turtle nests on the islands’ sandy
beaches suffered greater than 30 percent mortality. Today, as a result
of the GDNR removing nearly 3,000 hogs from the island annually, those
nests experience less than 5 percent mortality.
Interestingly, researchers also documented a significant increase in
the body weight of Ossabaw’s white-tailed deer following wild pig
reduction efforts. This fact, along with other research conducted in
southeastern hardwood forests, demonstrates that wild pigs present a
formidable source of competition for dozens of native wildlife and plant
species. Largely due to the pigs’ habit of bulldozing seedlings and
rooting for mast crops, such as acorns, these forested areas are
experiencing dramatic change. Hardwood regeneration has nearly halted
and many wildlife species are outcompeted for critical resources.
Unfortunately, the wild pig’s impact on native mammals is not
restricted to increased competition or habitat destruction. Hogs harbor
numerous diseases as well as internal and external parasites that are
transmissible to wildlife, livestock and even humans. Many of these
diseases, such as brucellosis, tuberculosis and the pseudorabies virus
have been the target of national disease-eradication programs for
livestock. As wild pig numbers continue to increase and spread to new
areas, biologists are concerned that their efforts to eradicate or
reduce the prevalence of these diseases in wild and domestic animals
will be in vain. In addition, researchers at the USDA National Wildlife
Disease Center note the possibly insurmountable challenge of controlling
an “accidental or intentional outbreak of a foreign animal disease,
such as foot and mouth, rinderpest, African swine fever or classical
swine fever” if those diseases were ever to find their way into the wild
pig population. [More]
I suppose this is one of those problems too outlandish to consider soberly until your poodle gets eaten by one. But it seems to me climate change will favor their spread.
Or maybe this species doesn't need any help.