Document Type

Article

Department/Program

Virginia Institute of Marine Science

Publication Date

7-2005

Journal

Diseases of Aquatic Organisms

Volume

66

Issue

1

First Page

47

Last Page

70

Abstract

Parasitic dinoflagellates in the genus Hematodinium are important parasites of marine Crustacea. Outbreaks of these parasites have damaged commercial stocks of Norway lobster Nephrops norvegicus, snow crab Chionoecetes opilio, Tanner crab C. bairdi, American blue crab Callinectes sapidus, and velvet swimming crab Necora puber. Species of Hematodinium can reach high enough levels to regulate their host populations, but mortalities are also centred on the unfished juveniles and females, hosts not normally sampled by fisheries; hence impacts are often underreported. Seasonal prevalences of up to 85 % occur annually in many host populations; in effect, these parasites form cryptic blooms in the water column with crabs and other crustaceans at risk of disease. We review the biology and ecology of Hematodinium spp. infections in crustaceans. lncluded is a comparison of the different infections, a synthesis of what is known, and an attempt to highlight fruitful areas for continued research.

DOI

10.3354/dao066047

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