. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. B i »— 0 TIME (s) FIGURE 2. Luminescent responses of two specimens of Pleurornamma xiphias to a single 10 V, 5 ms duration electrical stimulus. (A) Typical flash response exhibiting fast and slow components. The relative intensity of emission is displayed with time; time bar = 1 s. (B) Decay kinetics of both components of the flash displayed in (A). Relative intensity (log scale) is shown as a function of time. For each component the slope of the calculated linear regression (solid lines) reflects
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. B i »— 0 TIME (s) FIGURE 2. Luminescent responses of two specimens of Pleurornamma xiphias to a single 10 V, 5 ms duration electrical stimulus. (A) Typical flash response exhibiting fast and slow components. The relative intensity of emission is displayed with time; time bar = 1 s. (B) Decay kinetics of both components of the flash displayed in (A). Relative intensity (log scale) is shown as a function of time. For each component the slope of the calculated linear regression (solid lines) reflects the rate of exponential decay (refer to text). Decay rate of the fast component (a) was while the decay rate of the second component (b) was (R = for each). (C) Flash lacking the second component. As in (A) except that the vertical scale is magnified 10 times. (D) Decay of light emission of the flash displayed in (C). As in (B). The decay rate was (R = ). methods of collection and analysis of data were identical to those described in the previous section. RESULTS Spectral characteristics Bioluminescence emission spectra from 7 specimens of Pleurornamma xiphias were centered in the blue region of the visible spectrum with maxima at approxi- mately 492 nm. Two types of spectral distributions were measured; about half of the specimens produced unimodal spectra while the others generated bimodal spectra (Fig. 1). Regardless of the spectral shape, the dominant emission was at 492-493 nm while the short-wavelength 472 component was present either as a subpeak or shoulder. Bimodal emission spectra were also measured from the two specimens of P. ab- dominalis tested. They differed only slightly from those of P. xiphias, having maximal emission at 486 nm and a short-wavelength subpeak at 465 nm (Fig. 1). Neither species gave evidence of sexual differences in spectral Please note that these images are extracted from scanned page images that may hav
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
