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- W2149256624 abstract "AME Aquatic Microbial Ecology Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsSpecials AME 33:163-172 (2003) - doi:10.3354/ame033163 Parasitism of Dinophysis norvegica by Amoebophrya sp. in the Baltic Sea Paulo S. Salomon*, Sven Janson, Edna Granéli Department of Biology and Environmental Science, University of Kalmar, Landgången 3, 391 82 Kalmar, Sweden *Email: paulo.salomon@hik.se ABSTRACT: The temporal and vertical distribution of the infection of the dinoflagellate Dinophysis norvegica by the endoparasite Amoebophrya sp. was investigated at a fixed sampling location in the Baltic Sea during 2000 and 2001. Infected hosts were detected by epifluorescence microscopy after DAPI staining. The maximum depth-averaged parasite prevalence was 2.3% in July 2000 and 1.8% in August 2001. The percentage of infected hosts was usually higher close to the thermocline than at the surface. The highest parasite prevalence at a specific depth (4.8%) was found at 20 m in August 2001. No correlation was observed between parasite prevalence and host abundance or dissolved nutrient (N and P) concentrations, neither for depth-averaged nor discrete depth measurements. However, temperature seemed to be an important factor influencing infection of D. norvegica by Amoebophrya sp., with infected host cells observed only above 12°C. Amoebophrya sp. was only sporadically observed inside other dinoflagellate species, indicating specificity towards D. norvegica. The seasonal pattern of infection suggests the existence of a dormancy stage of the parasite dinospores. The low prevalence observed during this study indicates that parasitism by Amoebophrya sp. is not a relevant loss factor for D. norvegica in the Baltic Sea. KEY WORDS: Phytoplankton · Interspecific interactions · Parasitism · Dinoflagellates · Amoebophrya · Dinophysis norvegica · Baltic Sea Full text in pdf format PreviousNextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in AME Vol. 33, No. 2. Online publication date: October 14, 2003 Print ISSN: 0948-3055; Online ISSN: 1616-1564 Copyright © 2003 Inter-Research." @default.
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- W2149256624 title "Parasitism of Dinophysis norvegica by Amoebophrya sp. in the Baltic Sea" @default.
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