Journal of Comparative Physiology A

, Volume 156, Issue 1, pp 135–143 | Cite as

The spectral sensitivity of eye movements in response to light flashes inDaphnia magna

  • T. R. Consi
  • E. R. Macagno
Article

Summary

The crustaceanDaphnia magna responds to a flash of light with a ventral rotation of its compound eye; this behavior is termed eye flick. We determined the spectral sensitivity for the threshold of eye flick in response to light flashes having three different spatial characteristics: (1) full-field, extending 180° from dorsal to ventral in the animal's field of view; (2) dorsal, 30° wide and located in the dorsal region of the visual field; (3) ventral, same as dorsal but located ventrally. All three stimuli extended 30° to the right and to the left of the animal's midplane. We found that spectral sensitivity varies with the spatial characteristics of the stimulus. For full-field illumination, the relative sensitivity was maximal at 527 nm and between 365 nm and 400 nm, with a significant local minimum at 420 nm. For the dorsal stimulus, the relative sensitivity was greatest at 400 nm, but also showed local maxima at 440 nm and 517 nm. For the ventral stimulus, the relative sensitivity maxima occurred at the same wavelengths as those for the full-field stimulus. At wavelengths of 570 nm and longer, the responses to both dorsal and ventral stimuli showed lower relative sensitivity than the full-field stimulus. No circadian or other periodic changes in threshold spectral sensitivity were observed under our experimental conditions. Animals which had their nauplius eyes removed by means of laser microsurgery had the same spectral sensitivity to full-field illumination as normal animals. Our results are discussed in terms of our current knowledge of the spectral classes of photoreceptors found in theDaphnia compound eye.

Keywords

Spatial Characteristic Spectral Sensitivity Sensitivity Maximum Relative Sensitivity Periodic Change 

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References

  1. Aréchiga H, Wiersma CAG (1969) Circadian rhythm of responsiveness in crayfish visual units. J Neurobiol 1:71–85Google Scholar
  2. Baylor ER, Smith FE (1957) Diurnal migration of plankton crustaceans. In: Scheer BT (ed) Recent advances in invertebrate physiology. University of Oregon Publications, Eugene, pp 21–35Google Scholar
  3. Collett TS, Land MF (1975) Visual control of flight behavior in the hoverflySyritta pipiens L. J Comp Physiol 99:1–66Google Scholar
  4. Consi TR, Brody GM, Macagno ER (1981) The structure and motor innervation of the eye ofDaphnia magna. Am Zool Abstr 21:956Google Scholar
  5. Frost BJ (1975) Eye movements inDaphnia pulex (De Geer). J Exp Biol 62:175–187Google Scholar
  6. Harris JE (1963) The role of endogenous rhythms in vertical migration. J Marine Biol Assoc UK 43:153–166Google Scholar
  7. Harris JE, Mason P (1956) Vertical migration in eyelessDaphnia. Proc R Soc Lond B145:280–290Google Scholar
  8. Kaplan E, Barlow RB (1980) Circadian clock inLimulus brain increases response and decreases noise of retinal photoreceptors. Nature 286:393–395Google Scholar
  9. Labhart T (1980) Specialized photoreceptors at the dorsal rim of the honeybee's compound eye: Polarization and angular sensitivity. J Comp Physiol 141:19–30Google Scholar
  10. Macagno ER, LoPresti V, Levinthal C (1973) Structure and development of neuronal connections in isogenic organisms: variations and similarities in the optic system ofDaphnia magna. Proc Natl Acad Sci USA 70:57–61Google Scholar
  11. Ringelberg J, Servaas H (1971) A circadian rhythm inDaphnia magna. Oecologia 6:289–292Google Scholar
  12. Ringelberg J, Flick BJG, Buis RC (1975) Contrast orientation inDaphnia magna and its significance for vertical plane orientation in the pelagic biotope in general. Neth J Zool 25:454–475Google Scholar
  13. Röhlich P (1967) Fine structural changes induced in photoreceptors by light and prolonged darkness. In: Salanki J (ed) Symp on neurobiology of invertebrates. Hungarian Academy of Science, Budapest, pp 95–109Google Scholar
  14. Röhlich P, Törö I (1965) Fine structure of the compound eye ofDaphnia in normal, darkand strongly light-adapted state. In: Rohen JW (ed) Eye structure. II. Symp Schattauer, Stuttgart, pp 175–186Google Scholar
  15. Sandeman DC (1978) Regionalization in the eye of the crabLeptograpsus variegatus: Eye movements evoked by a target moving in different parts of the visual field. J Comp Physiol 123:299–306Google Scholar
  16. Scheffer D, Robert P, Médioni J (1958) Réactions oculo-motrices de la Daphnie (Daphnia pulex De Geer) en réponse à des lumières monochromatiques d'égale énergie. Sensibilité visuelle et sensibilité dermatoptique. CR Soc Biol Strassbourg 6:1000–1003Google Scholar
  17. Schehr RS (1984) Spectral sensitivities of anatomically identified photoreceptors in the compound eye ofDaphnia magna. PhD dissertation, Columbia UniversityGoogle Scholar
  18. Schehr R, Macagno ER (1983) Possible trichromacy in a crustacean visual system. Soc Neurosci Abstr 9:325Google Scholar
  19. Schulz H (1928) Über die Bedeutung des Lichtes im Leben niederer Krebse. Z Vergl Physiol 7:488–552Google Scholar
  20. Sims SJ, Macagno ER (1984) Computer reconstruction of all of the neurons in the optic ganglion ofDaphnia magna. J Comp Neurol (in press)Google Scholar
  21. Viaud G (1948) Le phototropisme et les deux modes de la photoréception. Experientia 4:81–88Google Scholar
  22. Waterman TH (1982) Fine structure and turnover of photoreceptor membranes. In: Westfall JA (ed) Visual cells in evolution. Raven Press, New York, pp 23–41Google Scholar
  23. Young S (1974) Directional differences in the colour sensitivity ofDaphnia magna. J Exp Biol 61:261–267Google Scholar

Copyright information

© Springer-Verlag 1985

Authors and Affiliations

  • T. R. Consi
    • 1
  • E. R. Macagno
    • 1
  1. 1.Department of Biological SciencesColumbia UniversityNew YorkUSA

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