General Information

Event name: US-89-017
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 (1979.)
Individuals to contact: ROSS, Maria R.

Location & Date

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Location: Latitude: , Longitude:
General location information: San Louis Obispo County., California.
HAB Area code(s): US-20
Additional location information: Areas affected: Moro Bay, Moonstone Beach, Cambria, North Estero Bay, Estero Bay Cayucos.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Late August- October, December


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 The bloom originated in San Louis Obispo and Santa Barbara Counties.
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: The annual mussel quarantine, May 1 to October 31, was in effect, however in December emergency quarantine was issued and commercial oyster operations in Moro Bay were shut doun.
Additional harmful effect information: Paralytic toxin levels elevated in shellfish - cultured and wild bay mussels, wild sea mussels, and cultured pacific oysters reachign 1600 micrograms in sea mussels and 540 micrograms in oysters.