Pteronarcys scotti, VA, 2001

Sandberg, John B. & Stewart, Kenneth W., 2006, Continued Studies Of Vibrational Communication (Drumming) Of North American Plecoptera, Illiesia 2 (1), pp. 1-14 : 6

Pteronarcys scotti .

Fifty-one and six signals were obtained from one, 6–11 day old male and female, respectively, at 24°C and 70 FTC. The male and the female produced 2-way duets either with the female answer following the call (N=3) or with interspersed answer beats during the male’s 2 nd (N=1), 3 rd (N=1), or 5 th (N=1) beat intervals. The male called with signals of 9 mode beats (8.1 ± 2.2); with intervals of 600.9 ± 42.1 ms ( Fig. 6 , Table 1 ). The male’s average individual intervals gradually increased from 538.0 ms (i1) to 655.2 ms (i11) ( Table 2). Mode and mean number of beats per female answer signal were 5 and 5.7 ± 1.0; mean beat interval was 198.9 ± 47.5 ms. The ♂ - ♀ exchange interval was 361.6 ± 189.5 ms for sequenced and overlapped duets.

Figures

Figs. 1–6. 1. Soliperla campanula drumming. Bar = 100-msec, total duration (TD)= 257-msec; 2. Isoperla muir drumming. (A) Male call, TD = 482-msec, (B) 2-way duet, TD = 960-msec. Bars = 500-msec.; 3. Isoperla rainera drumming. (A) Male call, TD = 1172-msec, (B) 2-way duet, female answer to computer playback of male call, TD = 2150-msec. Bars = 500-msec; 4. Isoperla rougensis drumming. (A) 2-way duet with female interspersed answer, (B) Split-channel view reveals previously hidden female first answer beats, TD = 574-msec. Bars = 500-msec; 5. Isoperla tilasqua drumming: 2-way duet with female interspersed answer, TD = 849-msec. Bar = 500 msec; 6. Pteronarcys scotti drumming: 2-way duet with female interspersed answer, TD = 4725-msec. Bar = 1000-msec.