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Distal Retinal Pigment of the Fiddler Crab, Uca pugilator: Release of the Dark‐Adapting Hormone by Methionine Enkephalin and FMRFamide
Release of the dark-adapting hormone in the fiddler crab's far retinal layer triggered by methionine enkephalin and FMRFamide
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Abstract
Injection of the neuropeptides methionine enkephalin and FMRFamide into fiddler crabs results in dark adaptation of the distal retinal pigment.
- Both neuropeptides are associated with stimulating the release of a hormone that aids in dark adaptation of the retina.
- The effect on dark adaptation suggests an indirect action on the distal retinal pigment.
- The findings indicate a potential hormonal mechanism underlying retinal responses in fiddler crabs.
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