Document Type

Report

Department/Program

Virginia Institute of Marine Science

Publication Date

1995

Abstract

The once thriving oyster industry in the Chesapeake Bay and east coast of the United States, has been threatened by overfishing, and diseases caused by two protistan parasites, Haplosporidium nelsoni (MSX) and Perkinsus marinus (Dermo). Three lifestages are recognized in the lifecycle of P. marinus, meronts (trophozoites), prezoosporangia, and the biflagellated zoospores. The effects of the diseases caused by the two protists have been well documented (Andrews 1988, Barber et. al. 1988, Ford 1988, Ford and Figueras 1988, Chu et al 1993, Chu and LaPeyre 1993a, 1993b, Paynter and Burreson 1991). Since 1986, P. marinus has reportedly caused greater oyster mortalities in lower Chesapeake Bay than H. nelsoni (Andrews 1988). (...)

Keywords

Perkinsus marinus, American oyster -- Diseases, American oyster -- Diseases -- Transmission

Share

COinS