Figure 8.

Drosophila visually attend the arena's edge during exploration. Wild-type Canton-S, w¹¹¹⁸, and norpA⁷ were examined in circular arenas that had either a clear or opaque boundary. The activity of the normally sighted Canton-S and the blind norpA⁷ did not significantly change in the two different arenas. However, the visually impaired w¹¹¹⁸ flies demonstrated distinct differences (Bonferroni–Dunn; P < 0.0001). The increased contrast obtained with the darkened arena wall rescued the w¹¹¹⁸ activity decay phenotype. n = 24 for each genotype/condition.