Abstract

In photoreceptors of insects and some other arthropods, the migration of screening pigment granules has been shown to have the same spectral- or polarization-sensitivity as the visual response. We demonstrate that for a crustacean, the crayfish Procambarus clarkii. the sensitivity spectrum of pigment migration matches the sensitivity spectrum of the electroretinogram. This provides further support for the theory that the visual response initiates the migration of screening pigment.

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