. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 806 E. A. WIDDER ET AL. 1 r z LU LJJ > LU DC. 400 450 500 550 600 WAVELENGTH (nm) FIGURE 5. Effect of filters in the photophores of a single specimen ofArgyropelecus affinis on emission spectra. Measured with fiber collection optics; relative intensity displayed as function of wavelength, (a) Emission of posterior photophores, Xmax = 486 nm, FWHM = 29 nm, S/N = 15; (b) spectral emission of anterior photophores with ventral tip excised, Xmax = 484 nm, FWHM = 53 nm, S/N = 9. lens collection optics appeared to be bimodal (Fi
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 806 E. A. WIDDER ET AL. 1 r z LU LJJ > LU DC. 400 450 500 550 600 WAVELENGTH (nm) FIGURE 5. Effect of filters in the photophores of a single specimen ofArgyropelecus affinis on emission spectra. Measured with fiber collection optics; relative intensity displayed as function of wavelength, (a) Emission of posterior photophores, Xmax = 486 nm, FWHM = 29 nm, S/N = 15; (b) spectral emission of anterior photophores with ventral tip excised, Xmax = 484 nm, FWHM = 53 nm, S/N = 9. lens collection optics appeared to be bimodal (Fig. 6A). Examination with the fiber bundle collection optics showed that some polyps produced different unimodal emis- sion spectra (Fig. 6B) with a difference in emission maxima of 70 nm. Due to its dimness, this spectral shift was much more difficult to distinguish visually than the 30 nm difference displayed by different Stachyptilum colonies. A different colony of the same Parazoanthus species had only one emission spectrum which matched the shorter wavelength spectrum of the two color colony. In the pinecone fish Cleidopus gloria-maris there is a visible color difference between the bacterial light organ of juveniles as compared to adults. Comparison of the emission spectra confirmed a 15 nm short wavelength shift in the adults. The fiber bundle collection optics demonstrated the presence of a pronounced emission gradient across the juvenile light organ that was essentially absent in the adult (Table II). Light from the anterior region of the juvenile light organ had a Xmax of 555 nm compared to a Xmax of 523 nm measured from the mid region and 516 nm in the posterior region. In the adult, measurements from equivalent regions across a single organ were 506 nm, 506 nm, and 503 nm from anterior to posterior. These emission spectra of both juvenile and adult are very different from the spectrum measured from Vibrio fischeri (Xmax 492 nm, Table II), the bacterium isolated from
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
