General Information

Event name: US-05-015
Nature of the harmful event:
High Phyto concentration , Seafood toxins
Event directly affected:
Natural Fish , Birds , Shellfish
Toxicity detected: Yes (Approximate range: 38 - 2540 ug/100g)
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (State of Maine Biotoxin Monitoring Program)
Event occurred before in this location: Yes (Annually)
Individuals to contact: COUTURE, Darcie A.

Location & Date

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Location: Latitude: , Longitude:
General location information: Western Maine Coast, Northeast
HAB Area code(s): US-02
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Mytilus - 5/11/05, Modiolus - 7/19/05.. Toxin still present in Spisula solidissima and Euspira heros through December 2005


Causative organism known: Yes
Causative Species/Genus: Alexandrium spp. ( 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: 0
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
Mytilus edulis, Mya arenaria, Modiolus Saxitoxins 2540 ug/100g Bioassay-Mouse
Crassostrea virginicus, Ostrea edulis Saxitoxins Bioassay-Mouse
Mercenaria, Ensis directus Saxitoxins Bioassay-Mouse
Spisula solidissima, Euspira heros, Pandalus Saxitoxins Bioassay-Mouse
Kit used: No Type of kit used:
Additional information: Toxin detected in hepatopancreas of Homarus americanus and in gut content of Clupea harengus
Economic losses:
Management decision: Many harvest and aquaculture areas closed
Additional harmful effect information: Transmission through food web to Pandalus shrimp, Clupea harnegus, Homarus americanus, and suspected transmission to sea birds and larger predatory fish including tuna.