. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 34O 430 600 MO Wavelength |rm) J*D 420 BOD sao Wavelength (nm) 310 «0 500 580 Wavelength (r¥n) I- igure 6. Effects ofchromatic adaptation on the spectral sensiti\ it> of S Jchilis. (A) Green chromatic adaptation had a greater effect on thesensitmtv ol'thc blue-green receptors than the violet receptors, lead- ing toa relative enhancement of the uolet peak. (B) The dark-adapted spectral sensitivity curve lor another preparation showed no distinct violet peak. Green adaptation depressed the sensitivity of the blue- green rec
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 34O 430 600 MO Wavelength |rm) J*D 420 BOD sao Wavelength (nm) 310 «0 500 580 Wavelength (r¥n) I- igure 6. Effects ofchromatic adaptation on the spectral sensiti\ it> of S Jchilis. (A) Green chromatic adaptation had a greater effect on thesensitmtv ol'thc blue-green receptors than the violet receptors, lead- ing toa relative enhancement of the uolet peak. (B) The dark-adapted spectral sensitivity curve lor another preparation showed no distinct violet peak. Green adaptation depressed the sensitivity of the blue- green receptors, exposing the violet receptors and thereby producing a distinct violet peak in the spectral sensitivity function. (C) Blue adapta- tion had a greater effect on short wavelength sensitivity, depressing the sensitivity of the violet receptors to such an extent that only the blue- green peak is now visible. Results of four other green adaptation and four other blue adaptation experiments were consistent with the results shown. Intensities of adapting lights were (A) 10 4.(B) x 10"'. and (C) x I0~ different from the long wa\ clength responses in the dark- adapted c\e (Fig. 7A). For another specimen, the wave- forms were identical in the dark-adapted eye. but upon green chromatic adaptation, the short wavelength re- sponses became markedly different from the long wave- length responses (Fig. 7B). Blue adaptation had either no effect when waveforms were identical in the dark- adapted eye. or actually diminished differences that were initially present in the dark adapted eye (Fig. 7C). All of these results support the conclusion that Systcl- A/v/'/s possesses two spectral classes of receptor cells with different response characteristics: one with maximal blue-green sensitivity and the other maximally sensitive in the \iolet. Janicella spinacauda The dark-adapted spectral sensitivity curves of the four specimens tested displayed a consistent maximum atSOOnm i
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
