U.S. national survey finds frog abnormalities are rare

A 10-year study by the US Fish and Wildlife Service shows some good news for frogs and toads on national wildlife refuges. The rate of abnormalities such as shortened or missing legs was less than 2 percent overall -- indicating that the malformations first reported in the mid-1990s were rarer than feared. But much higher rates were found in local "hotspots," suggesting that where these problems occur they have local causes.
Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/P...