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Figure 8


Fig. 8. Effect of skin conductivity on electric image shape (box model; skewed current density). (A) Optimal non-uniform skin conductivity profile, which has a low 0.00025 S m-1 conductivity at the head, a high 0.0025 S m-1 conductivity in the tail region and a linear conductivity increase between the two constant conductivity regions (delimited by pink dotted lines). Black broken lines delimit the EO. (B) The electric images produced by a 1 cm-radius metal object located at 0.39 along the normalized length of the EO, 3 cm lateral to the fish's midline (black dotted line; see inset) for different values and shapes of skin conductivity are shown. Green trace shows the electric image obtained with the non-uniform skin conductivity. Red and blue traces show the electric images obtained with uniform skin conductivities of 0.00025 S m-1 ({sigma}head) and 0.0025 S m-1 ({sigma}tail), respectively.





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