| Autor: |
Gribakin, F., Alekseyev, E., Shukolyukov, S., Gogala, M. |
| Zdroj: |
Journal of Comparative Physiology A: Sensory, Neural & Behavioral Physiology; Aug1995, Vol. 177 Issue 2, p201-206, 6p |
| Abstrakt: |
The spectral sensitivity of 21 eye preparations of Ascalaphus ( Libelluloides) macaronius (Insecta, Neuroptera) has been re-measured using an up-to-date spectral scan method. 1. Dorso-frontal and ventro-lateral eyes have different spectral characteristics with peaks of sensitivity at 329 ± 8 nm ( n = 15) and 343 ± 4 nm ( n = 5) ( P = 0.002), respectively. 2. The absorbance of the visual pigment layer, K, determined from the shape of the spectral sensitivity curves is 1.3 ± 1.8( n = 15) for dorso-frontal eyes and − 1.0 ± 0.3( n = 5) for ventrolateral eyes, thus implying higher selfscreening in the dorso-frontal eyes and narrowing of the spectral sensitivity curves as regards to a template visual pigment in ventro-lateral eyes. 3. Plotting K versus spectral sensitivity peak wavelength λ revealed an inverse correlation between these variables with K = 42.5 − 0.126 λ at r = 0.88( n = 19). 4. Extracts of ommochromes and carotenoids (Figs. 4 to 6) do not allow to account for the above diversity of optical properties of the Ascalaphus eye (Fig. 7). [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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