General Information

Event name: US-19-010
Nature of the harmful event:
High Phyto concentration
Event directly affected:
Toxicity detected: Yes (Approximate range: 0.0 - 3068.9 ug/g)
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector): Surf clams (Spisula), Mytuilus edulis, Razor clams (Ensis), Mya arenaria, Quahogs (Arctia and Mercenaria), European Oyster (Ostrea), American Oyster (Crassostrea) were found to contain some level of toxin.
Report the outcome of a monitoring programme: Yes (Maine Department of Marine Resources Biotoxin Program)
Event occurred before in this location: Yes
Individuals to contact: Lewis, Bryant , Miller, David

Location & Date

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Location: Latitude: , Longitude:
General location information: Maine Coastline,
HAB Area code(s): US-03
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd): First detection: 2019-05-08, End: 2019-11-20
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Alexandrium sp. (1740 cells/L)
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: Razor and surf clams closed in portions of the area 5/8/19. Soft shell clams closed in a portion of the area 5/24/19. Soft shell clam and quahog closures ended 7/31/19. Razor clam closure ended 8/14/19. Surf clam closure ended 11/20/19.
Additional harmful effect information: Mandatory closure from April October for mussels, European oysters and carnivorous snails.
Created at 07:26 on 10 Feb 2020
Updated at 07:34 on 10 Feb 2020