General Information

Event name: US-95-014
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: No
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector): Butter clams, Razor clams.
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: Yes (1982 outbreak at Second Hand Beach in the general vicinity showed mussels with levels of greater that 5,000 g/100 grams that affected five people.)
Individuals to contact: OSTASZ, Michael J.

Location & Date

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Location: Latitude: 55.866667, Longitude: -159.333333
General location information: Humpback Bay., Alaska.
HAB Area code(s): US-26
Additional location information: On the south side of the Alaska Peninsula near Perryville, Alaska.
Bloom event dates (yyyy/mm/dd): Event Date:1995-04-02
Start: 1995-04-02,
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


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: 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 No identification made of water sample.
Additional Environmental information: Relatively flat bottom bay with depths to 21 fathoms.

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Butter clams Saxitoxins STX eq 141 Bioassay-Mouse
Razor clams (Tissue) Saxitoxins STX eq 544 Bioassay-Mouse
Razor clams (Viscera) Saxitoxins STX eq 3,294 Bioassay-Mouse
Razor clams (whole animal, 4/2/95) Saxitoxins STX eq 979 Bioassay-Mouse
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision: Press release made.
Additional harmful effect information: 7 individuals twith varying symptoms of nausea, numbnes of hands and feet, dizziness and nubness in mouth.