Auditory sexual difference in the large odorous frog Odorrana graminea.

摘要: Acoustic communication is an important behavior in frog courtship. Male and female frogs of most species, except the concave-eared torrent Odorrana tormota, have largely similar audiograms. The large odorous (Odorranagraminea) are sympatric with O. but no ear canals. difference hearing between two sexes unknown. We recorded auditory evoked near-field potentials single-unit responses from midbrain (the torus semicircularis) to determine frequency sensitivity threshold. results show that males upper limit at 24 kHz females 16 kHz. more sensitive range 3–15 for 1–8 females. Males minimum threshold 11 (58 dB SPL), higher about 5 than 3 best excitatory frequencies single units mostly 7–8 males. underlying mechanism sexual differences discussed.