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Fig. 8. Knollenorgan tuning estimated by upside-down plots of amplitude spectra of
revcor filters for type I individuals (left) and type II individuals (right).
Revcor filter spectra were smoothed using an unweighted three-point average,
scaled the same with respect to power (20 dB scale bar indicated) and shifted
by an arbitrary amount along the vertical axis to avoid overlap. A circle
highlights the best response frequency of each unit. Each spectrum corresponds
to a unique receptor. Knollenorgans in the type I morph: specimen 1, SL=94.5
mm, adult female or non-breeding male (blue); specimen 4, SL=107 mm, dominant
male (green); specimen 3, SL=92 mm, adult female or non-breeding male (red).
Knollenorgans in the type II morph: specimen 6, SL=76 mm, adult female or
non-breeding male (blue); specimen 2, SL=87.5 mm, adult female or non-breeding
male (red); specimen 5, SL=94.5 mm, adult female or non-breeding male (green).
One star indicates receptors described in
Fig. 9A,B; two stars correspond
to Fig. 9C,D.