Seasonal variation in lamellar-type cytosomes, dopa decarboxylase activity and average beating rate of the oyster crassostrea virginica

  • Paparo A
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Abstract

1. Cytosomal lamellations, DOPA decarboxylase and ciliary activity were observed in the central and peripheral neuronal elements and/or ctenidia of the oyster, Crassostrea virginica (Gmelin). 2. The largest numbers of cytosomal transformations were seen in the 5%oS habitat oysters. 3. The lowest numbers of this organelle was observed in 30%ohabitat animals. 15%oS habitat oysters showed an intermediate number. 4. In all habitat populations of oysters, enzymatic activity was inversely correlated to number of mature cytosomal transformations. 5. In addition, the 5%oS habitat organisms proved to be the most sensitive to all eight parameters measured in this study. 6. In particular, zero basal beating rates were recorded in response to oxygen deprivation, and to exogenous EGTA and dopamine application. © 1986.

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Authors

  • Anthony A. Paparo

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