Abstract
Abstract Eastern oysters (Crassostrea virginica) inhabit highly variable environments and are exposed to large seasonal shifts in temperature. Prevalence and intensity of oyster diseases, particularly Perkinsus marinus (Dermo), increase during thermally stressful periods, thus posing additional stress on the oyster host. Heat shock proteins (hsps) are important in protecting organisms from thermal and overall environmental stress. Additionally, hsps may play protective roles for both the host and parasite during infection. The interactive effects of temperature and disease on heat shock protein expression in oysters, however, are unknown. In this study, using slot and western blotting assays, seasonal and intraspecific variation in heat shock protein 70 (hsp70) expression was compared among stocks of C. virginica known to be resistant or susceptible to Dermo at two sites in the Chesapeake Bay. Mortalities, shell heights, condition, and P. marinus infections were also compared among stocks to examine relat...
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