General Information

Event name: US-90-003
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 1,500 g STXeq / 100 g.)
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: Yes (Every year since 1972, different areas of the coast affected in different years.)
Individuals to contact: HURST, John W.

Location & Date

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Location: Latitude: , Longitude:
General location information: Kittery to Spruce Head., Maine.
HAB Area code(s): US-02
Additional location information:
Bloom event dates (yyyy/mm/dd): Start: 1990-05-01, End: 1990-11-30
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: May - November


Causative organism known: Yes
Causative Species/Genus: Alexandrium tamarense ( 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: No 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 Seems to be in situ populations along the Maine coast.
Additional Environmental information: Data not available

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Mytilus edulis Saxitoxins <40 - 1,500 Bioassay-Mouse
Mya arenaria Saxitoxins <40 - 600 Bioassay-Mouse
Spisula solodissima Saxitoxins <40 - 860 Bioassay-Mouse
Ostrea edulis Saxitoxins <40 - 46 Bioassay-Mouse
Modiolus modiolus Saxitoxins <40 - 110 Bioassay-Mouse
Lunatia heros Saxitoxins 300-1,140 Bioassay-Mouse
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision: Affected areas closed to the harvest of specific species.
Additional harmful effect information: Paralytic Shellfish Poisoning in shellfish. (Mytilus edulis, Mya arenaria, Ostrea edulis, Spisula solidissima, Modiolus modiolus, Lunatia heros). Shellfish extracts and mouse bioassays prepared and performed at the Department of Marine Resources, West Bo