The life cycle of the Eastern oyster (Crassostrea virginica) includes a period of planktonic larval development. Oyster embryos or veliger larvae are free swimming for approximately 21 days before they settle onto clean oyster shell and recruit to the bottom. Plankton tows will be conducted near restoration sites to evaluate the abundance of oyster veligers throughout the spawning season. These estimates of oyster veligers per volume of water will be combined with estimates of broodstock abundance, demographics, fecundity, and recruit abundance for the same site to evaluate the contribution made by the broodstock on a particular reef to the overall availability of oyster veligers within a habitat.