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Effects of Norepinephrine and Norepinephrine Agonists and Antagonists on the Melanophores of the Fiddler Crab Uca pugilator

Milton Fingerman, Mukund M. Hanumante, Sue W. Fingerman and Dana C. Reinschmidt
Journal of Crustacean Biology
Vol. 1, No. 1 (Feb., 1981), pp. 16-27
Published by: Brill on behalf of The Crustacean Society
DOI: 10.2307/1548202
Stable URL: http://www.jstor.org/stable/1548202
Page Count: 12
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Effects of Norepinephrine and Norepinephrine Agonists and Antagonists on the Melanophores of the Fiddler Crab Uca pugilator
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Abstract

1. Norepinephrine produces dose-related pigment dispersion in the melanophores of intact and eyestalkless fiddler crabs, Uca pugilator, but has no effect on the melanophores in isolated legs. 2. The effects of agonists and antagonists of norepinephrine on the rates of melanin dispersion and concentration were determined. 3. The results are consistent with the hypothesis that norepinephrine exerted its effect by acting on the central nervous system to trigger the release of melanin-dispersing hormone.

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