Life History Study of the Commercial Oyster in the Lower Laguna Madre - Survey of Oyster Populations and Associated Organisms


South Bay oyster population samples of one standard bushel (culled of dead shell) contained a low of 27 market oysters in January and a high of 116 market oysters in May. Market oysters were generally small in size. A peak spat set occurred in May to July, 1963, as indicated by data from population samples and spat collectors. This peak occurred after a rise in temperature and during a period of reduced salinities in the bay. Growth rates averaged 2.8 millimeters per month for market oysters and 5.4 millimeters per month for seed oysters. Oysters grew faster during the spring and winter. Condition rates indicated that market oysters were in poor condition during the fall of 1963, possibly due to unusually high salinities. There was no incidence of Dermocystidium marinum.


pages 177-184; available for download at the link below.


oyster population, Lower Laguna Madre