General Information

Event name: US-04-001
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 225)
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector): Mussels
Report the outcome of a monitoring programme: Yes (Kachemak Bay)
Event occurred before in this location: Yes (This occurrence with mussels has happened 3 days short of 2003's episode.)
Individuals to contact: OSTASZ, Michael J.

Location & Date

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Location: Latitude: 59.007778, Longitude: -151.008889
General location information: Kachemak Bay East, Alaska
HAB Area code(s): US-25
Additional location information: Single bay, Jakolof in Kachemak Bay. This occurrence is not uncommon for this time of year in this area for mussels.
Bloom event dates (yyyy/mm/dd): Start: 2004-05-08, End: 2004-06-08
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
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Mussels Saxitoxins STX eq 255 Bioassay-Mouse
Kit used: No Type of kit used:
Additional information:
Economic losses: Entire area of Kachemak Bay East closed for commercial mussel harvest. Only one active aquaculture site affected that grows mussels.
Management decision: Closed area and issued general press release.
Additional harmful effect information: