. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 92 J. BUCK. (£\) j n \ ; \ V •r \ 0 (2 3) 1 , -/ . I / v , - 2345678 LED FLASH TO FIREFLY FLASH (SECONDS) Figure 19. Frequency distributions of SD and LD responses. First peak ( s) is the average of 180SL responses of 6 STR males and 180 SD response of 6 CIR males (30 consecutive responses for each individual). Second peak ( s) is 72 LD responses of the 10 CIR males that emitted more than one LD Hash (filled columns), plus 1 1 corresponding spontaneous flash-to-flash intervals from the same males (unfilled caps).
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 92 J. BUCK. (£\) j n \ ; \ V •r \ 0 (2 3) 1 , -/ . I / v , - 2345678 LED FLASH TO FIREFLY FLASH (SECONDS) Figure 19. Frequency distributions of SD and LD responses. First peak ( s) is the average of 180SL responses of 6 STR males and 180 SD response of 6 CIR males (30 consecutive responses for each individual). Second peak ( s) is 72 LD responses of the 10 CIR males that emitted more than one LD Hash (filled columns), plus 1 1 corresponding spontaneous flash-to-flash intervals from the same males (unfilled caps). Figure 20. LD response of CIR male 107. Delay s. Figure 21. Pair of spontaneous flashes s apart. First flash was 11 s after previous flash. CIR male 107. Figure 22. LD response of CIR male 250. Delay s. T = 22°. Figure 23. Rare apparent SD and LD responses to same LED flash. SD delay s; LD delay s. CIR male 250. Figure 24. LD response (delay s). followed by two sponta- neous flashes, the first s later, the second s after the preceding. CIR male 250. Figure 25. Normal response of freely perched female to LED flash. Delay s. Female 1. Figure 26. Same as Figure 25. Delay s. Female 2. 1988). The figures in the present paper are intended only to illustrate the variation range of the response. Its de- tailed aspects will be taken up in another paper. Its puta- tive functions are discussed by Buck (1988). The SD male-male triggering behavior in P. pyralis is also of interest because its delay is often not greatly different from that for flashes elicited by electrical stimu- lation in the head (Case and Buck, 1963). Similarly, the delay of the L. lusitanica male-male response (Papi. 1969) corresponds to the electrical brain delay in that species (Brunelli el 1977). A photic response, distinct from the male-female interval, has been found also in P. concisits and shown to correspond to the head-lantern electrical dela
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