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Is It That Bad?

So... What's the Issue?

  • Cane Beetles eat the leaves off of the cane plant, and cause further damage by laying their larve in the roots of the plant

  • They often smell like rotten pork
  • The toads started out with a population of roughly 100 toads in 1935
  • The population has decoupled as of 2010
  • Starting out in Northeastern Australia, they have now spread to Western Australia as well
  • Many predatory species are suffering large numbers lost to their tenancy to consume the toads
  • The toads produce a toxic substance using special glands on their neck which covers their backs in a poison
  • The poison is a powerful hallucinogen when consumed in small doses, but is highly lethal in larger quantities
  • Death by Cane Toad isn't limited to predators in the outback - Humans have died too
  • Studies have shown that animal population in areas where the Cane Toads have invaded, decline
  • The Cane Toad has no natural predators which leaves them free to over-populate at alarming rates
  • Introduced in 1935 from Hawaii to control the Cane Beetles

  • Started in Northeast coastal Australia, but have quickly spread out of control

  • Population growth has nearly doubled in the past 30 years

  • The toads have no natural predators due to the toxins on their backs

Oh dear...

So What Can We Do?

Cane Toads

an invasive species

  • There is quite a lot of controversy over this issue, since the easiest methods aren't humane or as effective as they could be
  • Trapping and manual euthanization of the toads is labor intensive, and not very effective since other species are caught as well
  • Chemical warfare against the toads would be dangerous since scientist's don't have a good enough idea of the effect on other species
  • Genetically altering the toads so they are only able to produce male offspring would be labor intensive and costly
  • Introducing a new species is out of the question (Just look what happened last time...)

Thank you~

Are We Doomed?

  • Not quite yet since some native species are beginning to adjust
  • The Black Kite has learned to flip the toads over to expose their toxin-free under-bellies, and can now successfully eat them
  • Dhal's Aquatic Frogs are able to chow down on Cane Toad tadpoles without any ill-effects
  • Meat Ants have no problem swarming and slaughtering the toads, and the toads don't expect to be eaten because they aren't used to being hunted because of their poisons
  • Some Ibis's have been seen to consume small Cane Toads without getting sick
  • Saw-Shelled turtles have been fairly effective in becoming predators of the pests
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