Hofstetter, Robert P.Texas Parks & Wildlife Coastal Fisheries Project Report 19642010-02-152010-02-151965http://hdl.handle.net/1969.3/19918pages 185-206; available for download at the link below.Mortalities among tray-held oysters (Crassostrea virginica) were studied during a two year period at stations located on Switchover Reef and Hannah Reef. In 1963 mortalities at both stations showed similar patterns, increasing during the summer months (with peaks in August-September) and declining during the fall and winter. The summer mortalities were associated with high infections of Dermocystidium marinum. From March through December 1963 oysters at the Switchover station suffered a mortality of 52.6%. From April through December, 1963 a mortality of 42.2% occurred among the Hanna oysters.oystersCrassostrea virginicamortalitydiseasesDermocystidium marinumfungal diseasesTechnical Report