Univariate ANCOVA results on the effects of population of origin and season on the proportion of invertebrates and detritus in the diets of guppies from the Aripo River in Trinidad.

SS = sums of squares; df = degrees of freedom; MS = mean squares. All F-ratios are based on type-III sums of squares.

SS为平方和（sums of squares），df为自由度（degrees of freedom），MS为均方（mean squares）。所有F比均基于III型平方和。