Table 2 The general tendency to aggregate with conspecifics (|Δpl|) in the heterogeneous (F-C) and two types of homogeneous (F-F and C-C) larval environment. Test of the effect of intercept as the only explanatory variable for the general tendency of Drosophila larvae to aggregate with conspecifics (measured as |Δpl|, see text for details) in three types of larval environment (F-C, F-F or C-C). Whereas |Δpl| = 0 and no explanatory power of intercept would indicate a regular distribution of larvae across the food patches, |Δpl| > 0 and a significant effect of intercept indicates larval aggregation in one of the experimental food patches (see also Fig. 2b). Note that, in contrast to Δpl (Fig. 2a), |Δpl| measures larval aggregation in the F-C treatment independently of whether a food patches was fungal-infected or not. For each type of larval environment an individual test was performed, with N = 35 for each treatment.