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17 April 2014 12:48 pm ,
Vol. 344 ,
Officials last week revealed that the U.S. contribution to ITER could cost $3.9 billion by 2034—roughly four times the...
An experimental hepatitis B drug that looked safe in animal trials tragically killed five of 15 patients in 1993. Now,...
Using the two high-quality genomes that exist for Neandertals and Denisovans, researchers find clues to gene activity...
A new report from the Intergovernmental Panel on Climate Change (IPCC) concludes that humanity has done little to slow...
Astronomers have discovered an Earth-sized planet in the habitable zone of a red dwarf—a star cooler than the sun—500...
Three years ago, Jennifer Francis of Rutgers University proposed that a warming Arctic was altering the behavior of the...
- 17 April 2014 12:48 pm , Vol. 344 , #6181
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ScienceShot: Cane Toad Carnage
30 August 2011 7:01 pm
The biggest danger for a cane toad (Rhinella marina) egg isn't a predator of a different species; it's a cane toad tadpole. The tadpoles not only seek out and eat eggs, they also release chemicals into the water that stunt the growth of developing cane toad embryos, new research reveals. It's all part of an intense competition for resources. To study this phenomenon, scientists kept cane toad eggs with tadpoles in tanks and separated them with a mesh divider. When the eggs hatched, the new tadpoles were 11% shorter and 45% lighter than their siblings that developed in eggs that were kept alone. Additionally, the survival rate of the tadpole-exposed eggs was 40% lower, the team reports today in Biology Letters. The researchers haven't isolated the chemical responsible for dwarfing and killing the cane toads, but that's their next step. Such a compound could help control populations of cane toads in Australia, where they are considered an invasive species and threaten the diversity of native reptiles.
See more ScienceShots.