| Autor: |
Gribakin, F., Alekseyev, E., Shukolyukov, S., Gogala, M. |
| Zdroj: |
Journal of Comparative Physiology A: Neuroethology, Sensory, Neural, and Behavioral Physiology; August 1995, 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 ?max revealed an inverse correlation between these variables with K = 42.5 - 0.126 ?max 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). |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
Full text from SpringerLink