TABLE 5

Rate of song pulse production affected by slowpoke mutations

GenotypenPulses/minWEIPulses/min of wing ext.
slo1/+4345.9 ± 11.90.60 ± 0.03577.2 ± 28.2
slo1/slo1711.7 ± 9.80.37 ± 0.0766.6 ± 19.7
slo1/slo2831.3 ± 4.60.38 ± 0.0586.1 ± 9.4
slo2/slo21029.3 ± 3.70.31 ± 0.0397.4 ± 11.0
slo2/+12274.9 ± 22.50.58 ± 0.03481.4 ± 33.8
  • The numbers of pulses per minute were obtained from the same song records that led to the other singing parameters shown in Table 3. The wing-extension time was measured by observing videotape recordings of the male-female interactions (whereby a separate track on the tape recorded the audio portion of the courtships). The Wing-Extension Index represents the amount of time during a given videotape record of the courtship, during which the male extended one of his wings or the other (near the female), divided by the total recording time. The number of pulses per minute of wing extension was obtained for each fly separately by dividing the number of pulses per min by the WEI. Analysis of variance revealed highly significant differences between genotypes (F[4, 36] = 47.25, P < 0.0001). Tukey-Kramer multiple comparisons divided the genotypes in two groups: slo/+ and slo/+ forming one group and slo1/slo1, slo1/slo2, and slo2/slo2 the other.