Fig. 10. Spectral phase shifts of magnostipes-complex EODs. (A) Example reference EODs acquired as DC recordings of type I and type II males from the Ivindo River (total duration of each trace=4 ms). (B) Multiple overlays, each showing a phase-shifted EOD (red; type I from A) on top of one of the unaltered, reference EODs (black). Phase shift angle is given as (see text for details). The reference EOD is plotted in the polarity and temporal alignment that minimizes the total squared deviation between it and the phase-shifted EOD (i.e. it is allowed to invert freely; see asterisks). In the left column of B, the type I EOD is compared to phase-shifted versions of itself. In the right column, the phase-shifted type I EOD is compared to the type II reference EOD. (C) Minimum total squared deviation (across ) for best alignments between phase-shifted and reference EODs {i.e. D[V(t), V(t)]; defined in the text}. All deviations are scaled from 0 to 1 for each family of comparisons with a given pair of EODs across . Filled red squares are from comparisons shown in B. The plot at the right also shows 15 randomly selected comparisons between male EODs of the type I and type II morphs from the Ivindo River. For each comparison, the type I EOD was phase shifted and the type II EOD served as the reference (open squares) and vice versa (filled circles). (D) Distribution of angles () providing the best fit between phase-shifted male EODs of one morph and unaltered male EODs of the other morph (for all comparisons in C, right plot).