. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 340 400 460 520 580 Wavelength (nm) 340 400 460 520 580 Wavelength {nm) Figure 4. Dark-adapted spectral sensitivity curves from four speci- mens of Systellaspis dehilis. demonstrating the variability in their spec- tral sensitivity. Criterion response = 50 n Wavelength (nm) Figure 5. (A) Average standardized spectral sensitivity curve from only those dark-adapted 5. ilchilis that possessed bimodal spectral sen- sitivity curves (n = 8). The two sensitivity maxima were consistently at 400 and 500 nm. (B. C) Dark-adapted sp
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 340 400 460 520 580 Wavelength (nm) 340 400 460 520 580 Wavelength {nm) Figure 4. Dark-adapted spectral sensitivity curves from four speci- mens of Systellaspis dehilis. demonstrating the variability in their spec- tral sensitivity. Criterion response = 50 n Wavelength (nm) Figure 5. (A) Average standardized spectral sensitivity curve from only those dark-adapted 5. ilchilis that possessed bimodal spectral sen- sitivity curves (n = 8). The two sensitivity maxima were consistently at 400 and 500 nm. (B. C) Dark-adapted spectral sensitivity curves for one preparation at two different criterion response levels were identical. Results of chromatic adaptation experiments indicate that two visual pigments may be present. Under green adaptation, the spectral sensitivity curve was markedly depressed in the long wavelength part of the spectrum (Fig. 6A). Green adaptation also brought out the violet peaks in two specimens where there was no evidence of a short wavelength peak in the dark-adapted eye (Fig. 6B). The effect of violet adaptation was to depress the short wavelength peak with respect to the long wave- length peak, although the effects were not equally distinct in all experiments. The strongest effects were seen in those specimens that had large 400 nm peaks in the dark- adapted spectral sensitivity curves (Fig. 6C). Differences in waveform responses to short versus long wavelength light suggest that the two putative pigments are in separate cells. Again, because of variability in elec- trode placement, the dark-adapted waveforms were not identical from animal to animal. In one specimen, the short wavelength response waveforms were distinctly. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woo
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
