General Information

Event name: US-11-001
Nature of the harmful event:
Water Discoloration , High Phyto concentration
Event directly affected:
Planktonic life
Toxicity detected: No
Associated syndrome:
Unexplained toxicity: Yes (Less than 100 fish deaths on site)
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (Chesapeake Bay Plankton Monitoring Program)
Event occurred before in this location: No
Individuals to contact: MARSHALL, Harold G.

Location & Date

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Location: Latitude: , Longitude:
General location information: Ware River, Southeast Virginia
HAB Area code(s): US-10
Additional location information: tributary to Mobjack Bay, Virginia
Bloom event dates (yyyy/mm/dd): Event Date:2010/05/05
Start: 2010/05/05, End: 2010/05/07
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Karlodinium veneficum (100,000,000 cells/L)
Co-Ocurring Species/Genus: Polykrikos kofoidii (10 cells/L)
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: Yes Oxygen content (nL/L): Wind velocity:
Temperature (°C): 21.5 Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: 15.3 Current Velocity:
Nutrient information:
Temperature Range During Event: Max: 29 °C, Min: °C
Salinity Range During Event: Max: 17.5,
Bloom location in the water column: Whole column
In situ
Growth Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: Type of kit used:
Additional information:
Economic losses:
Management decision:
Additional harmful effect information: Bloom concentrations subsided, bloom reported briefly in adjacent East River and Mobjack Bay, but no extended bloom persisted or other fish deaths
Checked at 05:07 on 15 Apr 2015