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. 2007 Mar 2;3(3):e38. doi: 10.1371/journal.pcbi.0030038

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© 2007 Babineau et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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All images in both panels are computed as the difference in transdermal potentials, with and without objects (as described in Materials and Methods).

(A) Electric images produced by six distinct background widths, which differ in number of objects (see inset). Red, 1; orange, 3; yellow, 5; green, 7, blue, 9; purple, 11. The 2 cm–diameter discs have a conductivity of 0.0005 S/m to mimic the plant Hygrophilia. Discs are located 0.05 m away laterally from the fish's midline and are separated, one from another, by 0.03 m. All series of objects are centered near the fish's midpoint (red object in inset) and color in inset denotes external objects of a given series.

(B) Electric images due to backgrounds with three different interobject spacings: blue, 0.03 m (same as panel A); green, 0.06 m; red, 0.09 m. Otherwise, objects are identical to those in panel (A).