Figure 6

Panoramic mismatches and search distribution along the Y-axis. A. Panoramic mismatch along the feeder-landmark line for the Rotation 16° and 32° tests and along the feeder-nest line for the no-landmark test. The vertical arrows represent the average position of the first U-turn displayed by each ant (counting only ants that displayed U-turns before reaching the landmark) (ANOVA between groups: F = 11.096; p < 0.0001; all pairs Tukey's post hoc: Rotation16° a, Rotation32° b, no-landmark b). The horizontal arrows represent the average value of mismatch where the first U-turns were displayed (inferred from the 2D distribution of image difference, Figure 2) (ANOVA between groups: F = 0.3823; p = 0.6835). The open circles on the side of each arrow indicate the inter-individual standard deviation. B. Search distribution of the ants along the Y-axis. Paths were limited to the first 30 m travelled. The relative distribution was first calculated for each individual and then pooled for each condition so that each individual ant contributed equally to the distribution. The arrows indicate the position of the nest (for the no-landmark condition) or the fictive nest in front of the landmark (for Rotation 16° and 32° conditions).