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Figure 2


Fig. 2. Directional choice of sandhoppers in a range of coloured landscapes. (A,D,G) Controls with vision of the sun and sky only. (B,C) Black cardboard artificial landscape. (B) Black cardboard landward; (C) black cardboard seaward. (E,F) Yellow and orange artificial landscape. (E) Orange landward, yellow seaward; (F) orange seaward, yellow landward. (H,I) Blue and green artificial landscape. (H) Green landward, blue seaward; (I) green seaward, blue landward. White arrowhead, seaward direction for solar orientation; black arrowhead, seaward direction indicated by vision of the artificial landscape; dots, direction of movement of sandhoppers (one per dot); black arrow, mean vector and angle (the length of the mean vector ranges from 0 to 1 = radius of the circle); N, sample size; u, V-test value with the probability level of at least P<0.05.





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