Abstract:The fecundity selection” hypothesis has been used to explain why females grow larger than males in many animal species. To test whether this hypothesis is able to explain inter-specific differences in sexual dimorphism, we compared sexual dimorphism and female fecundity of two species of frogs, the gold-stripe pond frog (Pelophylax plancyi) and the terrestrial frog (Fejervarya limnocharis), in eastern China. In May 2002, 93 terrestrial frogs (51 males, 42 females) and 104 gold-stripe pond frogs (28 males, 7...