| Event name: | US-03-004 | |
| Country: | UNITED STATES | |
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Nature of the harmful event: |
Seafood toxins , Mass mortalities , Other ( High densities of Pseudo-nitzschia observed by volunteer network) | |
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Event directly affected: |
Shellfish , Aquatic Mammals | |
| Toxicity detected: | Yes (Approximate range: 1 - 80 ppm DA.) | |
| Associated syndrome: | ASP | |
| 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 | |
| Individuals to contact: | LANGLOIS, Gregg | |
| Location: | Latitude: , Longitude: | |
| General location information: |
Santa Cruz - Monterey., California, Northern California. HAB Area code(s): US-20 |
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| Additional location information: | NORTHERN CALIFORNIA (progressing north to south): Santa Cruz and Monterey Counties. | |
| Bloom event dates (yyyy/mm/dd): | Start: 2003-03-12, End: 2003-04-09 | |
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | High densities of Pseudo-nitzschia and elevated domoic acid concentrations from March through early April; low levels reoccurred in September and October. Peak concentrations observed late March/early April (68-80 ppm in mussels). Pseudo-nitzschia bloom also occurred in Del Norte, Humboldt and Marin counties. Low levels of domoic acid detected in mussels from Humboldt in mid August and in crab viscera from Sonoma in late October. Higher levels of domoic acid were detrected in crab viscera from Marin County in late October (41 ppm). | |
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Pseudo-nitzschia spp.
( cells/L)
Qualitative. |
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| Co-Ocurring Species/Genus: | ||
| Chlorophyll concentration, if known: | µg/l | |
| Additional bloom information: | Additional species: Numerous dinoflagellate and diatom species. | |
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