General Information

Event name: US-17-005
Nature of the harmful event:
Other ( potentially toxic species)
Event directly affected:
Toxicity detected: No
Associated syndrome:
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (Maryland Phytoplankton Monitoring Program)
Event occurred before in this location: Yes (Pseudo-nitzschia blooms have occurred most years in the Chesapeake Bay since 2000, yet low levels of domoic acid toxicity have been associated to date. Offshore monitoring started 2 years ago. 2017 was the first year we tried to count large vs small cells offshore.)
Individuals to contact: WAZNIAK, Cathy

Location & Date

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Location: Latitude: 38.333889, Longitude: -75.091944
General location information: Isle of Wight Bay (XDN0146),
HAB Area code(s): US-10
Additional location information: Peak levels occurred in Isle of Wight Bay near the OC inlet on March 20 (840 cells/ml mostly large cells)- not believed to be in the P. delicatissima-complex or P. pseudodelicatissima-complex based on the transapical axis. Chesapeake Bay samples (Tangier
Bloom event dates (yyyy/mm/dd): Start: 2017-03-20, End: 2017-04-12
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: 7/20 offshore


Causative organism known: Yes
Causative Species/Genus: Pseudo-nitzschia sp. (84000 cells/L)
March 20, 2017
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity:
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
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:
Created at 04:46 on 23 Apr 2018
Updated at 04:00 on 9 May 2018