Action spectrum for the photophobic response of Ciona intestinalis (ascidieacea, urochordata) larvae implicates retinal protein

From: Photochemistry and Photobiology | Date: September 1, 1999| Author: | Copyright information

ABSTRACT

Ascidian tadpole larvae change swimming behavior during the course of development. The photic behavior of the larvae of Ciona intestinalis was monitored by a computerized cell-tracking system with a time resolution of 0.1 s. Newly hatched larvae swim at an average speed of 1.4 mm/s but show no response to light stimuli. The swimming speed of the larvae became slower (0.4 mm/s) 3 h after hatching and they were induced to swim more rapidly by a sudden decrease in light intensity 4 h after hatching. During the course of development, the maximal speed of swimming behavior increased with ...

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