Comparison of bullfrog population establishment and predictor variables in water bodies (n = 137) between plots with a simple enclosure and those with an elaborate enclosure in Hunan, Hubei, Guizhou and Yunnan Provinces, China. Values are proportions or means (±SE).

*P<0.05.
***P<0.001.
at-values from a comparison of the means for continuous variables, and χ2-values from a test of independence for categorical variables.
bCategory is the unit for vegetation cover (see text).