General Information

Event name: US-20-001
Nature of the harmful event:
High Phyto concentration
Event directly affected:
Toxicity detected: Yes (Approximate range: 0-239.2ppm)
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (Maine DMR Biotoxin Monitoring)
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-01
Additional location information:
Bloom event dates (yyyy/mm/dd): Start: 2020-01-14, End: 2020-10-19
Quarantine levels dates (yyyy/mm/dd): First detection: 2020-06-21, End: 2020-07-05
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Alexandrium catenella (4740 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
Spisula solidissima Saxitoxins 239 ppm LC
Kit used: Type of kit used:
Additional information: HPLC tested
Economic losses:
Management decision: Closures are implemented when shellfish toxin thresholds are met or exceeded. Precautionary closures are implemented as needed due to additional risk factors.
Additional harmful effect information:
Created at 09:42 on 19 Apr 2021