Fig. 6.

Electromyogram recordings from developing male and female larynges. In adulthood (bottom panels), male EMGs increase in amplitude throughout the stimulus train, while female EMGs have a nearly constant amplitude. At the end of metamorphosis (top panels), both sexes display a decrease in EMG amplitude in response to a stimulus train (EMG potentiation <1.0). Both sexes then increase EMG potentiation values somewhat (EMG potentiation ~1.0; middle panels). Males then further increase EMG potentiation during development while females do not. Calibration bar: 50 ms.

male	female
a: end of metamorphosis, EMG = 0.6, 5 mg larynx	b: end of metamorphosis, EMG = 0.8, 6 mg larynx
c: postmetamorphic, EMG = 2.1,100 mg larynx	d: postmetamorphic, EMG = 1.5, 95 mg larynx
e: mature, EMG = 4.3, 309 mg larynx	f: mature, EMG = 1.7, 270 mg larynx