Virginia Institute of Marine Science
Journal of Shellfish Research
Experiments were conducted to determine the settlement distribution of the oyster Crassostrea virginica (Gmelin) in relation to tidal zonation in an area where adult populations are largely confined to the intertidal zone. Hatchery-reared pediveliger larvae were interned in PVC tubes positioned at known tidal heights. The influence of non-tidal factors was limited: mesh covering the ends of the tubes prevented loss of larvae to dispersal or predation, the settling substrate was not colonized by competitors, and the effects of light and horizontal currents were minimized. Settlement was found to occur throughout the intertidal zone but predominated at the bottom of the tidal-depth gradient. Few oysters settled in the zone occupied by the adult populations, the intertidal position of which is hypothesized to be controlled by predation.
oyster, Crassostrea virginica, intertidal zonation, settlement, microcosm
Roegner, G. Curtis and Mann, Roger L., Settlement Patterns Of Crassostrea virginica (Gmelin, 1791) Larvae In Relation To Tidal Zonation (1990). Journal of Shellfish Research, 9(2), 341-346.