Science Friday

How Cannibalistic Tadpoles Could Curb Invasive Cane Toads

Jun 4, 2025
Biologist Rick Shine of Macquarie University discusses his pioneering project using CRISPR to create cannibalistic tadpoles that feast on cane toad eggs, aiming to tackle Australia’s invasive cane toad crisis. Elizabeth Kolbert, a journalist from The New Yorker, shares her insights on similar conservation efforts and the ethical dilemmas they entail. Together, they explore the unexpected consequences of manipulating nature, the tragic history of the cane toads’ introduction, and the fragile balance of ecosystems.
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ANECDOTE

Cannibalistic Tadpoles Behavior

  • Cane toad tadpoles in Australia display intense cannibalism by eating freshly laid eggs in their pond.
  • This behavior is a survival strategy due to competition for food among abundant toad populations.
INSIGHT

Peter Pan Tadpoles Concept

  • "Peter Pan" tadpoles are genetically engineered to never mature into adult toads.
  • They consume the eggs of other toads, reducing recruitment and potentially controlling the invasive population.
ADVICE

Careful Testing of Gene Editing

  • Proceed slowly and carefully when introducing genetically modified animals to ecosystems.
  • Conduct comprehensive trials in labs, enclosures, and isolated water bodies to assess all impacts and prevent unintended consequences.
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