Descriptive statistics, expressed asmeans ± 1 SE (range), formetamorphosis rate,metamorphosis time and variance ofmetamorphosis time. Results of two-way ANOVAswith food supply
and larval density as the factors are given in the table. SF: sufficient food supply; IF: insufficient food supply; LD: lowdensity (6 tadpoles per literwater);MD:middle density (12 tadpoles
per liter water); HD: high density (18 tadpoles per liter water). Means with different superscripts differ significantly (Tukey's test, α = 0.05, a N b N c).