How #cat flaps for warthogs can help save the #cheetah
Southern Africa’s game farms are private reserves that
house wildlife such as giraffes, zebras and antelope to be used for
restocking national parks, meat production or trophy hunting. But these
farms have a problem. Warthogs and porcupines want to move around the
reserves too, and they have an annoying habit of making large holes
under the boundary fences to burrow their way in and out. For cheetahs,
these holes are an ideal way to get inside and prey on the valuable
game.
Cheetahs are considered pests in these reserves and, in Namibia, game farmers end up killing more cheetahs than livestock farmers do. These game farms needed to find a way to let the warthogs in while keeping the big predators out. Warthogs in, cheetahs out.Niki Rust, Author provided
The solution is simple but unusual – have you ever considered whether
your cat flap might be used by other animals besides your feline
friend? It turns out “swing gates” (a technical term for a glorified cat
flap installed along a fence line) are ideal.
According to research I carried out with colleagues in Namibia, recently published in the African Journal of Ecology,
warthogs and porcupines have learned how to use these gates, but big
cats such as cheetahs and leopards don’t seem to have figured this out
yet. It could be that the big cats see an intact fence and do not
bother to investigate the integrity of it, whereas warthogs may be more
inquisitive and spend more time rummaging around the fence line looking
for holes. Warthogs: happy in holes.Mark Jordahl, CC BY
This is great news for both livestock and wildlife farmers because it
now stops movement of large carnivores into farms and can limit the
amount of expensive antelope or buffalo that are killed by predators.
With the threat removed, farmers now do not need to resort to hunting
carnivores to limit the damage that they cause on the farms, and it also
means that they no longer kill hole-digging species like warthogs,
aardvarks and porcupines to limit the number of fence breaches.
Our study determined that the number of holes dug by burrowing
animals under game fences decreased over time and this was most evident
when the swing gates were easily accessible and ideally placed. This
means installing gates in open areas with harder soil, dense vegetation,
close to the watering holes where water-loving, perpetually-thirsty
warthogs like to hang out. Cheetahs keep out.Niki Rust, Author provided
What’s more, swing gates are far cheaper than electric fencing – the
conventional way to stop animals burrowing their way in. So it’s really a
win for both people and wildlife. Electric fencing requires continual
application of weed killer to stop the grass from short-circuiting the electric current,
but the only maintenance that is needed with swing gates is the
occasional hole-filling from the rogue warthog that does decide to dig a
new hole under the fence.
Temporary fix but no long-term solution
If we want to conserve cheetahs and promote co-existence between
humans, wild game and wild predators, then using fences to exclude big
cats from their natural habitat won’t work in the long term. But for the
time being, this is a quick and simple fix. Farmers can add swing gates
to their tool box of effective yet non-lethal techniques to combat predation of livestock.
Still hungry.Tambako, CC BY-SA
Laurie Marker, founder of the Cheetah Conservation Fund and one of
the study’s co-authors, points out why it is so crucial that this works
for game farmers too. Predators, she says, create large financial losses
on game farms. “Swing gates will enable us time to work on a permanent
solution that will enable all species to peacefully coexist on the same
land, such as the development of conservancies.”
In these conservancies
wildlife is allowed to roam free, without high game fences. As Marker
points out, “neighbouring farmers and land occupiers then manage the
resources collectively, allowing for predators to be managed within the
larger landscape system.”
In the meantime, you better watch out what other critters enter your house via your cat flap, as it might not just be Felix that is coming inside.
Niki Rust does not work for, consult to, own shares in or
receive funding from any company or organisation that would benefit from
this article, and has no relevant affiliations.
The Conversation is funded by Howard Hughes Medical Institute,
Robert Wood Johnson Foundation, Alfred P Sloan Foundation and William and
Flora Hewlett Foundation. Our global publishing platform is funded by
Commonwealth Bank of Australia.
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