Average ciliary beat in the oyster: Response to photoperiod, pentylenetetrazole, salyrgan, serotonin and dopamine

Publisher Website
Google Scholar
Abstract
Lamellar conversions of cytosomes, DOPA decarboxylase and lateral ciliary activities were measured in central and peripheral neuronal tissues and/on ctenidia of the oyster, Crassostrea virginica (Gemelin). 5‰ S habitat and acclimation animals exhibited significantly (P < 0.0S) higher numbers of transformed cytosomes and lower decarboxylase activities. Exposure to light for long periods of time, and exogenous perfusion at pentylenetetrazole enhanced lamellar conversion. Periods of darkness reduced the incidence of lamellar morphogenesis. Salyrgan can both increase (in 5‰ S and 10‰ S groups) and decrease (in 15‰ through 30‰ S groups) membranous conversions. Electrical stimulation of the branchial nerve increased the average lateral ciliary beat and decarboxylase activities in the ctenidium. Serotonin (cilioex‐citatory) and dopamine (cilioinhibitory) are endogenous neurotransmitters. The magnitude of the lateral cilioexcitation‐cilioinhibition and decarboxylase activity is directed related to the incidence of lamellar conversions.
Keywords