
Seasonal potentiation of gill muscle contraction in four species of bivalve molluscs
Keywords: DA، دوپامین; ACh, acetylcholine; cAMP, cyclic adenosine monophosphate; cGMP, cyclic guanosine monophosphate; CIM, confidence interval of mean; DA, dopamine; DMSO, dimethyl sulfoxide; 5HT, 5-hydroxytryptamine; ir, immunoreactive; L-NAME, nitro-l-arginine methyl ester;