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Poisonous frogs face greater risk of extinction
Amphibians that use toxins to protect themselves against predators are at a higher risk of extinction than those who use other types of defence, new research has found.
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London: Amphibians that use toxins to protect themselves against predators are at a higher risk of extinction than those who use other types of defence, new research has found.
As part of nature's evolutionary arms race, animals have evolved a whole host of different defence mechanisms, including chemical defences, such as poisons or irritants, camouflage, warning colouration and mimicry.
The team examined how rates of extinction and speciation - the formation of new species - varied across different defensive traits in amphibians.
They found that animals that use chemical defence show higher rates of speciation, but also higher rates of extinction, compared to those without, leading to a net reduction in species diversification (the interplay of speciation and extinction).
In contrast, the use of warning colouration and mimicry was associated with higher rates of speciation, but unchanged rates of extinction.
