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The aim of the present study was to partially characterize the biochemical properties of cholinesterase (ChE) activity in the tissues of the cockle Cerastoderma glaucum, using different substrates and sample volumes, and to evaluate ChE response following caging exposure in a fishing harbour. Comparative analysis of the Michaelis-Menten kinetics in the studied tissues of C. glaucum indicated that ChE activity, using acetylthiocholine as substrate, displayed a tissue- dependent response, with activity levels in the following order of magnitude: whole animal > rest of animal (adductor and retractor muscles, mantle and foot) > visceral mass > gills. The transfer of C. glaucum to the Teboulba fishing harbour caused a time-dependent reduction in acetyl- cholinesterase activity.

Characterization and evaluation of cholinesterase activity in the cockle Cerastoderma glaucum