Strawberry poison frogs pass on chemical defense to offspring

11/21/2013 | National Geographic News (free registration)

Strawberry poison frogs provide chemical defenses to their tadpoles by feeding them eggs spiked with alkaloids, according to a study. Researchers measured alkaloid content in the frogs during different stages of development, separating them into two groups -- one in which tadpoles were reared and fed by their mothers and the other in which the scientists undertook the care and feeding. The results showed that the tadpoles reared by their mothers contained alkaloids in most stages as opposed to those raised by researchers, which showed no sign of the chemical, according to the study published in Ecology.

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