General Information

Event name: US-89-012
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes
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 (1962, 1963, 1964, 1965, 1980, 1982, 1984, 1986, 1988.)
Individuals to contact: ROSS, Maria R.

Location & Date

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Location: Latitude: , Longitude:
General location information: Marin county., California.
HAB Area code(s): US-21
Additional location information: Areas affected: Drakes Estero areas #12, #17, Drakes Bay Chimney Rock Boat Launch, Kehoe Beach, Stinson Beach, Tomales Bay Lawson's Landing.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: December 1988, January, Febrary and an isolated occurrence March 4, 1989 Stinson Beach (wild sea mussels).


Causative organism known: Yes
Causative Species/Genus: Protogonyaulax catenella ( 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 data available but most probably in situ growth. No visible red tide conditions reported for this period, however there was a reference to the 'year's highly unusual winter bloom'.
Additional Environmental information: No data available

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision: Closure of commercial shellfisheries, emergency quarantine on sport-harvested shellfish from the entire Marin county coastline, which was completely lifted on March 20, 1989.
Additional harmful effect information: Paralytic Shellfish Toxin Activity in shellfish; sentinel bay mussels, natural bay mussels, sentinel sea mussels, natural sea mussels, pacific oysters, sentinel Japanese scallops, gapers clams (viscera).