General Information

Event name: US-88-013
Nature of the harmful event:
Event directly affected:
Toxicity detected: No
Associated syndrome:
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: No
Event occurred before in this location: Yes (1980, 1984, 1986)
Individuals to contact: ROSS, Maria R.

Location & Date

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Location: Latitude: , Longitude:
General location information: Drakes Estero Area 17 and Drakes Bay, Marin County, California,
HAB Area code(s): US-01
Additional location information:
Bloom event dates (yyyy/mm/dd): Event Date:1988-12-20
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: No
Causative Species/Genus:
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: Most likely Protogonyaulax catenella no No attempt made to identify positively and no other data available.
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:
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
In situ
Growth Comments Most likely in situ growth because there have been previous occurrences. No other available data on the dinoflagellate population.
Additional Environmental information: No temperature, salinity, oxygen concentration or water column stability measurement data available.

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: Type of kit used:
Additional information:
Economic losses:
Management decision: Area closed to commercial harvesting
Additional harmful effect information: Paralytic shellfish toxin in commercial mussel beds Drakes Estero bay mussels 87 g/100 g Drakes Bay sentinel Sea mussels 290 g/ l00 g Mouse bioassay by the Department of State Health Laboratory,,Berkeley, Ca. No colouration of the water observed