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Figure 2


Fig. 2. Maze with covered middle segment, same orientations and dimensions as in Fig. 1A,B. The Perspex cover excluding UV radiation extended by 15 cm into the N-S-channel segments on both sides. (A) Eastward orientation. Mean vectors, at 1 m, 2 m and 3 m radii: 345.8°/350.3°/350.4°; vector lengths 0.89/0.90/0.94; N=23, 23, 16. Mean vector not significantly different from 0° (open arrowhead) at all radii, but highly significantly different from 315° (filled arrowhead). (B) Westward orientation. Mean vectors 12.9°/15.0°/16.3°; vector length 0.91/0.92/0.95; N=22, 22, 18. Mean vector not significantly different from 0° at 1 m, but significantly different from 0° at 2 m and 3 m. P<0.05. At all radii highly significantly different from 45°. Mean vectors of A and B significantly different (Watson-Williams test with Bonferroni correction, P<0.01).