. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Figure 1. Lateral view of male attached to STR suspension of No. 30 chromel wire. Not to scale (actual length of insect. 15 mm: of msect- to-pm wire, about 30 mm). sistent behavior of this sort has been described in either Photiuus pyralis or P. greeni during many years of study. Flying male A of P. pyralis may indeed orient toward the flash of flying near-neighbor B, if B happens to flash about 2 s after one of A's flashes. However, A does not flash an answer to B. and B pays no attention to A, so the attraction breaks down
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Figure 1. Lateral view of male attached to STR suspension of No. 30 chromel wire. Not to scale (actual length of insect. 15 mm: of msect- to-pm wire, about 30 mm). sistent behavior of this sort has been described in either Photiuus pyralis or P. greeni during many years of study. Flying male A of P. pyralis may indeed orient toward the flash of flying near-neighbor B, if B happens to flash about 2 s after one of A's flashes. However, A does not flash an answer to B. and B pays no attention to A, so the attraction breaks down. Flying males of P. pyralis may also be stimulated to flash, but not orient, by the flash of another male flying nearby. This occurs during synchronized flashing (Buck. 1935) and between males flying and flashing indoors in total darkness (Buck, 1938a). but the delay involved is less than half a second. The quantitative relationships of this short-delay response to the 2-s orientational re- sponse, and to the normal 6-s flashing period, are virtu- ally impossible to obtain from photometer measure- ments on a given male in the field, because of the un- predictable changes in direction, velocity, altitude, recording distance, and body orientation during flight. The relationships are also impossible to obtain from cap- tive (perched) males because such animals rarely flash spontaneously, and never regularly. In an effort to induce males to flash rhythmically from a fixed position that would permit controlled photic stimulation and recording, I attempted to induce flight in tethered specimens in the laboratory. As will be shown, this technique did permit recording of spontane- ous flashing and of normal photic responses. Unexpect- edly, it also evoked a new behavior suggesting that cir- cuitry mediating response at the female's characteristic delay interval is present in the male in latent form. Materials and Methods The principal laboratory data were derived from P. pmi/is males
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
