Pteronarcys dorsata, MS, 2000

Sandberg, John B. & Stewart, Kenneth W., 2006, Continued Studies Of Vibrational Communication (Drumming) Of North American Plecoptera, Illiesia 2 (1), pp. 1-14 : 13

Pteronarcys dorsata .

Fifty-one and six signals were obtained from one, 2–3-day old male and female, respectively, at 24°C and 65 FTC. The male and female of this species produced 2-way sequenced signals with either the female answer following the call (N=13), or with the answer beats interspersed within the call, beginning during the male’s 4 th (N=3), 5 th (N= 13) and 6 th (N=6) interval. The male called with signals of 6 mode beats; with intervals of 251.9 ± 9.6 ms ( Fig. 13 , Table 3). His average individual intervals gradually decreased from 258.3 ms (i1) to 241.6 ms (i6), the last interval increased to 245.6 ms (N=2) ( Table 4). Mode and mean beats per female signal were 5 and 4.9 ± 0.8; with intervals of 359.7 ± 45.9 ms. The ♂ - ♀ exchange interval was 141.1 ± 85.5 ms for sequenced and overlapped duets.

The results here coincide well with those of Stewart et al. (1982), with slight differences probably attributed to variation in environmental inputs rather than a new dialect. We add the interspersed female answer signal to the description of this species signaling.

Figures

Figs. 7–13. 7. Perlinella drymo drumming: 3-way exchange, TD = 689-msec. Bar = 500-msec; 8. Hydroperla crosbyi drumming: 3-way exchange, TD = 1491-msec. Bar = 500-msec; 9. Isoperla bifurcata drumming: 2- way duet with female interspersed answer, TD = 647-msec. Bar = 500-msec; 10. Isoperla phalerata 2-way duet, diphasic male call, TD = 2579-msec. Bar = 500-msec; 11. Isoperla sobria drumming: 2-way duet, female interspersed answer not shown, TD = 589-msec. Bar = 500-msec; 12. Isoperla quinquepunctata drumming. (A) Typical “multiple” 2-way duets, indicated by lines below, TD = 6727-msec. Bar = 1000- msec, (B) “Multiple” 2-way duets with female interspersed answer beat in first duet, TD = 1688-msec. Bar = 500-msec; 13. Pteronarcys dorsata drumming: 2-way duet with female interspersed answer, TD = 2652- msec. Bar = 1000-msec.