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Biol Bull 166: 237-250. (February 1984)
© 1984 Marine Biological Laboratory
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REGULATION OF THE RELEASE OF CHROMATOPHOROTROPIC NEUROHORMONES FROM THE ISOLATED EYESTALK OF THE FIDDLER CRAB, UCA PUGILATOR

L. SCOTI QUACKENBUSH 1 and MILTON FINGERMAN 1

1 Department of Biology, Tulane University, New Orleans, Louisiana 70118

Electrical stimulation of the isolated eyestalk of Uca pugilator induces the release of several peptides which affect epidermal chromatophores. Thresholds for release of these peptides were different, that for red pigment concentrating hormone (RPCH) being lowest, for black pigment dispersing hormone (BPDH) highest, and for black pigment concentrating hormone (BPCH) intermediate, but no red pigment dispersing hormone(RPDH) was detected at any voltage. Neurotransmitters, known to be present in crustacean central nervous systems, induced chromatophore dose dependent responses. Norepinephrine induced BPDH release, and dopamine induced both RPCH and BPCH release.

Submitted on July 8, 1983
Accepted on November 14, 1983






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