The Effect of Internal Conductivity on Electric Image Generation

<div><p>(A) Normalized electric images of the same metal cube (identical position) on fish with different internal conductivities. Red: 16.5 μScm⁻¹ (the same as water conductivity), cyan: 165 μScm⁻¹, blue: 1,650 μScm⁻¹, black: 16,500 μScm⁻¹ (normal conductivity), magenta: 165,000 μScm⁻¹. The skin is modelled for all cases, with a homogeneous conductivity of 500,000 μScm⁻¹. The dashed line shows the case of a fish with realistic internal conductivity and skin conductivity distribution. rl, realistic internal conductivity; rlh, realistic internal conductivity, heterogeneous skin distribution.</p><p>(B) Peak amplitude of the electric image of a metal cube (1 cm³) placed at 0.5 mm from the fish, as a function of body internal conductivity. The difference in the peak amplitude of the electric image corresponding to the realistic internal conductivity fish shown in this figure and that shown in <a href="http://www.ploscompbiol.org/article/info:doi/10.1371/journal.pcbi.0010016#pcbi-0010016-g001" target="_blank">Figure 1</a> is due to the use of two compartment bodies (see Materials and Methods).</p>