TABLE 4

Courtship song parameters influenced by excitability mutations in a cacophony genetic background

GenotypenIPI (msec)CPP (no. cycles)Amplitude (arbitrary units)IPF (Hz)
cacophony1342.3 ± 0.54.2 ± 0.115.5 ± 0.5252.7 ± 4.1
cac; napts1/+941.0 ± 0.64.2 ± 0.116.0 ± 0.4242.7 ± 4.0
cac; napts1/napts11448.0 ± 0.8**3.6 ± 0.1**12.0 ± 0.6**243.6 ± 3.7
cac; cspX1/+1041.2 ± 0.74.4 ± 0.116.7 ± 0.4247.1 ± 5.2
cac; slo1/+1443.5 ± 0.54.2 ± 0.114.6 ± 0.5244.6 ± 5.1
cac; slo1/slo1550.4 ± 0.7**4.0 ± 0.39.2 ± 0.6**257.4 ± 9.8
cac; slo2/+1042.8 ± 0.64.8 ± 0.1**17.0 ± 0.5265.0 ± 7.0
  • Recordings were performed for males of various genotypes, all of them including the cacophony mutation, at 25°. From the digitized versions of these records, the song parameters IPI (in msec), CPP, amplitude of the sounds, and IPF (in Hz) were determined. Analysis of variance indicates significant differences between genotypes for all four parameters (IPI: F[6 68] = 24.71, P< 0.0001; CPP: F[6 68] = 13.58, P< 0.0001; amplitude: F[6 68] = 20.18, P < 0.0001; IPF: F[6,68] = 2.3 8, P = 0.0378). Asterisks highlight genotypes that significantly differ from the cacophony control at 5% (*) and 1% (**) levels according to Dunnett's method (see materials and methods).