Abstract
1. Gamma-aminobutyric acid (GABA) blocked concentration of the pigments in melanophores and erythrophores of intact crabs. 2. GABA blocked the release of pigment concentrating hormones from the isolated eyestalk. 3. Octopamine (OA) blocked black pigment dispersion in intact crabs, but did not affect red pigment dispersion or concentration. 4. OA blocked the release of black pigment dispersing hormone from isolated eyestalks. 5. Met-enkephalin, but not Leu-enkephalin, stimulated black and red pigment concentration in intact crabs. 6. Met-enkephalin, but not Leu-enkephalin, stimulated the release of pigment concentrating hormones from isolated eyestalks. 7. Naloxone blocked the effects of Met-enkephalin in intact crabs and on isolated eyestalks. 8. Beta-endorphin induced black pigment dispersion in intact crabs and in isolated legs.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Comparative Biochemistry and Physiology. Part C, Comparative Pharmacology
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
