General Information

Event name: US-04-005
Nature of the harmful event:
High Phyto concentration , Seafood toxins
Event directly affected:
Toxicity detected: No
Associated syndrome:
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (California Department of Health Services Marine Biotoxin Monitoring Program)
Event occurred before in this location: Yes (Past massive red tides of this organism observed in San Luis Obispo and Monterey Bay in 1997.)
Individuals to contact: LANGLOIS, Gregg

Location & Date

[View larger map]
Location: Latitude: , Longitude:
General location information: California, Central Coast
HAB Area code(s): US-20
Additional location information: 1. San Luis Obispo County (20): North of Pt. Conception, encompasses Pismo Beach northward to Morro Bay and San Simeon.2. Santa Cruz and Monterey County (21): shoreline of Monterey Bay.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: March-July 1. San Luis Obispo County: Observed July through December. Peak relative abundance observed at Pismo Beach periodically from August through October. 2. Santa Cruz/Monterey Counties: red tides occurred in different locations July through September; cells present through December. Peak relative abundance in late July.


Causative organism known: Yes
Causative Species/Genus: Cochlodinium catenatum ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: Lower number of cells observed southward at sites through Los Angeles County and northward through Marin County. Dense blooms associated with noxious odors and co-occurred with mass mussel mortalities on pier pilings. Very high percentage of mortality in
Event-related bibliography: Monthly/Annual reports issued by CDHS Marine Biotoxin Monitoring Program

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
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision:
Additional harmful effect information: Complaints of noxious odor associated with nearshore bloom of Cochlodinium catenatum.