General Information

Event name: US-11-008
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: ND-1337 g Mytilus, N/D-2048 g tomalley)
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (Maine Department of Marine Resources Biotoxin Monitoring Program)
Event occurred before in this location: Yes (Maine experiences PSP events on an annual basis.)
Individuals to contact: COUTURE, Darcie A.

Location & Date

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Location: Latitude: , Longitude:
General location information: Eastern Maine coast (Penobscot Bay to Canada), Gulf of Maine
HAB Area code(s): US-01
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd): First detection: 2011-05-16, End: 2011-08-15
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Alexandrium fundyense ( 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
Homarus americanus Saxitoxins STX eq 2048 g Bioassay-Mouse
Placopecten magellanicus Saxitoxins STX eq 1454 g Bioassay-Mouse
Arctica islandica Saxitoxins STX eq 79 g Bioassay-Mouse
Mya arenaria Saxitoxins STX eq 574 g Bioassay-Mouse
Mytilus edulis Saxitoxins STX eq 1337 g Bioassay-Mouse
Mytilus edulis Domoic Acid DA <1 ppm ELISA
Kit used: Yes Type of kit used: Abraxis ELISA for DA
Additional information: A large bloom of Pseudo-nitzschia sp. near Penobscot Bay occurred in Sept. of 2011, and subsequent sampling of shellfish in that area (Mytilus) demonstrated a very low level (<1 ppm) of domoic acid was present in the shellfish tissue. Additional testing following bloom dissipation confirmed the depuration of any remaining toxin in that area. There were no harvest closures for this event.
Economic losses:
Management decision: There were multiple shellfish harvesting closures throughout this area of Maine due to PSP in 2011.
Additional harmful effect information:
Updated at 02:50 on 6 Feb 2020