Electric Image of a Plant-Like Background in the Presence and Absence of a Prey Object

<div><p>All images in both panels are computed as the difference in transdermal potentials, with and without objects (as described in Materials and Methods).</p><p>(A) Six fish positions (see inset, top) for which the electric images (bottom) produced by a 15-disc Hygrophilia plant-like background (0.05 m lateral to fish, as in <a href="http://www.ploscompbiol.org/article/info:doi/10.1371/journal.pcbi.0030038#pcbi-0030038-g003" target="_blank">Figure 3</a>) were calculated. Electric images are barely distinguishable from one another. Fish positions differ from one another by 0.02 m, 0.02 m, 0.03 m, 0.005 m, and 0.015 m (see inset).</p><p>(B) Same as in panel (A) except a Daphnia-like prey object (0.3-cm diameter as in <a href="http://www.ploscompbiol.org/article/info:doi/10.1371/journal.pcbi.0030038#pcbi-0030038-g001" target="_blank">Figure 1</a>) was added at a lateral distance of 0.008 m from the skin.</p>