General Information

Event name: US-89-010
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): Mussels.
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: Yes (1966, 1967, 1975.)
Individuals to contact: ROSS, Maria R.

Location & Date

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Location: Latitude: , Longitude:
General location information: Mendocino County., California.
HAB Area code(s): US-21
Additional location information: Areas affected: Bruhel Point, Anchor Bay, Caspar Point, South Caspar Headlands, MacKerricher State Park, Pt. Arena Lighthouse (85ft depth).
Bloom event dates (yyyy/mm/dd): Start: 1989-09-01, End: 1989-10-31
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: September- October


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 Most probably both conditions existed. This bloom first detected August 18 in counties south of Mendocino appeared to be moving northward and increasing in intensity.
Additional Environmental information: No available data.

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 was in force but emergency quarantine as instituted in mid September on the taking of clams, cockles, scallops, native oysters, and other bivalves along the north coast.
Additional harmful effect information: Paralytic toxin levels in wild sea mussels reached a concentration of 6300 micrograms per 100 grams of meat. Rock Scallop adductor from 85 ft depth had detectable toxin (53 g/100 gr). Two non fatal cases of paralytic shellfish poisoning, one adult and o