Fig. 2. Food consumption (A), growth rates (B) and growth efficiency (C) of control and size-selected Helix aspersa snails in the fast-growth ontogenetic phase (exponential-like part of growth curve; see Fig. 1). Growth efficiency is the ratio of the average increase of snail whole mass to food consumption. Symbols denote family-specific mean values calculated from data for 3-week intervals. Whisker charts show least-square means with 95% confidence intervals estimated at mean value of body mass, with the aid of GLM from Table 2.