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Behavioral Reactions of the Sea Anemone, Anthopleura xanthogrammica, to Ultraviolet and Visible Radiations

Ervil D. Clark and Donald J. Kimeldorf
Radiation Research
Vol. 45, No. 1 (Jan., 1971), pp. 166-175
DOI: 10.2307/3573089
Stable URL: http://www.jstor.org/stable/3573089
Page Count: 10
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Behavioral Reactions of the Sea Anemone, Anthopleura xanthogrammica, to Ultraviolet and Visible Radiations
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Abstract

The sea anemone, Anthopleura xanthogrammica, exhibits prompt behavioral responses to electromagnetic radiation in the visible and ultraviolet ranges that can be separated into reactions having markedly different spectral dependence. Differences were disclosed by exposure to monochromatic radiations in the range 240-650 nm. Different wavelength ranges and maxima were observed for (1) tentacle flexion, (2) tentacle retraction, (3) oral disc flexion, (4) column cavitation, and (5) peristome depression. Tentacle flexion appears to be a response to specific photoreceptors in that the maximum efficiency for stimulation is in the same spectral region as for many forms with discrete photoreceptors. Tentacle retraction is considered to be a response to absorption of energy by proteins and nucleic acids, as evidenced by its maximum efficiency peak at 280 nm. Oral disc, column, and peristome responses involve regional muscle action, probably induced by deep photoreceptors rather than by nonspecific effects on cell proteins.

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