Hesperoperla pacifica
Creators: name: Sandberg, John B.
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Perlidae
Hesperoperla
Hesperoperla pacifica

description: <i>Hesperoperla pacifica –</i> New Signal Character and Additional Populations The drumming of <i>H. pacifica</i> was examined from two additional populations in northern California (Table 2). Signals are reported separately for collected adults from Domingo Spring and reared adults from Domingo Spring and Butte Creek (Table 2). The male call of this species was first described as simple-monophasic (no grouped beats), by Stewart &amp; Zeigler (1977). The call signals reported here are complex: 196 of 211 analyzed were composed of initial monophasic tapping (1–7 beats), followed by 5–15 grouped signals (from both sites and by collected and reared adults). For this reason the initial monophasic (&amp;male; 1) and subsequent grouped portions (&amp;male; 2) of the call were analyzed separately (Table 2). Figure 6A–C reflects the combination call pattern, with initial monophasic average interbeat intervals i1–i7, followed by the grouped portion with average intergroup intervals igi1–igi14. Overall intergroup intervals are reported only in Table 2. <b>Reared</b> Butte Creek <i>H. pacifica</i> – One hundred twenty signals were recorded from three males (1–3 days old) and 25 signals from one female (1–5 days old) (Table 2). Ten signals were recorded and analyzed for the second female, collected live from Butte Creek that answered the audio playback of one previously recorded Butte Creek male call signal (Table 2). Male calls recorded 11–25 April 2007, had initial monophasic tapping with 2 mode beats (2.2 1.1) and overall average interbeat intervals of 213.1 65.3 msec, followed by 6–15 groups with 3 mode beats (2.6 0.7) and overall average intergroup intervals of 18.7 2.8 msec (Table 2). The 1–4 beat grouped signals had decreasing individual average intragroup intervals (19.7 2.8, 17.8 2.2, and 14.7 0.7 msec). Average male call durations were 4633 586 msec. Female answers had 31 mode beats (27.2 8.0) and overall average interbeat intervals of 83.7 17.7 msec. The male-female exchange patterns were 2-way (n=10) and 3-way (n=5) (Fig. 3-A) and their average durations were 2085 305 and 8654 564 msec respectively. The average interbeat interval call pattern of reared Butte Creek males indicated by white bars decreased throughout the 1–8 beat (i1–i7) initial monophasic portion (Fig. 6A). In the following grouped portion, the average intergroup interval pattern changed at about midpoint (igi9). Average intergroup intervals decreased over the first nine groups (igi1–igi8), then increased only slightly in the remaining six groups (igi9–igi14) (with the exception of igi11 that decreased). <b>Field-collected</b> Domingo Spring <i>H. pacifica</i> – Sixty-nine and 28 signals were recorded from five males and two females, respectively, on 19 May and 09 June 2007 (Table 2). Male calls recorded 19–20 May and 10–12 June, had initial monophasic tapping with 1 mode beat (1.6 0.7) and overall average interbeat intervals of 84.6 12.6 msec, followed by 5– 9 groups with 2 mode beats (2.0 0.3) and overall average intergroup intervals of 13.4 2.4 msec (Table 2). The 1–4 beat grouped signals had decreasing individual average intragroup intervals (13.5 2.5, 13.0 1.2, 11.8 (n=1) msec). Average male call durations were 661 155 msec. Female answers had 30 mode beats (26.7 9.7) and overall average interbeat intervals of 70.6 16.1 msec. The malefemale exchange patterns were 2-way (n=28) and 3- way (n=1) and their average durations were 2906 827 and 5271 (n=1) msec respectively. The average interbeat interval call pattern of fieldcollected Domingo Spring <i>H. pacifica</i> indicated by gray bars decreased throughout the 1–4 beat (i1–i3) initial monophasic portion (Fig. 6B). For the following grouped portion (igi1–igi8), the average intergroup interval pattern was relatively constant, increasing throughout the 9 groups (except igi3, which decreased). <b>Reared</b> Domingo Spring <i>H. pacifica</i> – Twenty-two signals were recorded from two males (3 days old) and 6 signals from two females (1–3 days old) (Table 2). Male calls recorded 16–18 June 2007, had initial monophasic tapping with 1 mode beat (1.7 0.7) and overall average interbeat intervals of 76.6 8.1 msec, followed by 5–8 grouped signals with 2 mode beats (1.9 0.3) and overall average intergroup intervals of 12.2 1.7 msec (Table 2 and Fig 4-A). Average male call durations were 612 53 msec. Female answers had 12 mode beats (11.3 3.3) and overall average interbeat intervals of 46.6 14.7 msec. The malefemale exchange patterns were 2-way (n=6) and 3- way (n=2) (Fig. 4-B) and their average durations were 1205 113 and 3724 220 msec respectively. The average interbeat interval call pattern of reared Domingo Spring <i>H. pacifica</i> indicated by black bars changed during the 1–4 beat (i1–i3) initial monophasic portion (Fig. 6C), first decreasing (i2) and then increasing slightly (i3). The following average intergroup interval pattern changed very slightly twice, first decreasing (igi1–igi3), then increasing (igi4–igi5), and finally decreasing again (igi6–igi7).
description: Published as part of <i>Sandberg, John B., 2009, Vibrational Communication (Drumming) Of The Western Nearctic Stonefly Genus Hesperoperla (Plecoptera: Perlidae), pp. 146-155 in Illiesia 5 (13)</i> on pages 150-152, DOI: 10.5281/zenodo.4759372
description: {"references": ["Zeigler D. D. and K. W. Stewart. 1977. Drumming behavior of eleven Nearctic stonefly (Plecoptera) species. Annals of the Entomological Society of America, 70 (4): 495 - 505.", "Stewart, K. W., S. W. Szczytko, B. P. Stark, and D. D. Zeigler. 1982. Drumming behavior of six North American Perlidae (Plecoptera) species. Annals of the Entomological Society of America, 75 (5): 549 - 554.", "Maketon, M. and K. W. Stewart. 1988. Patterns and evolution of drumming behavior in the stonefly families Perlidae and Peltoperlidae. Aquatic Insects, 10: 77 - 98.", "Maketon, M. and K. W. Stewart. 1984. Further studies of the drumming behavior of North American Perlidae (Plecoptera). Annals of the Entomological Society of America, 77: 770 - 778.", "Graham, E. A. 1982. Drumming communication and pre-mating behavior of fourteen Nearctic stonefly (Plecoptera) species. M. S. Thesis. University of Wisconsin-Stevens Point. 79 pp.", "Stewart K. W. and J. B. Sandberg. 2006. Vibrational communication and mate searching behavior in stoneflies, pp. 179 - 186. In: S. Drosopoulos and M. Claridge (eds.). Insect sounds and communication: physiology, behavior, ecology and evolution. CRC Press, Boca Raton / London / New York.", "Kondratieff, B. C., R. F. Kirchner, and K. W. Stewart. 1988. A review of Perlinella Banks (Plecoptera: Perlidae). Annals of the Entomological Society of America, 81: 19 - 27."]}