| Event name: | US-07-002 | |
| Country: | UNITED STATES | |
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Nature of the harmful event: |
High Phyto concentration , Seafood toxins | |
|
Event directly affected: |
Shellfish | |
| Toxicity detected: | Yes (Approximate range: detectable to 1312 ug/100 g tissue) | |
| Associated syndrome: | PSP | |
| Unexplained toxicity: | ||
| Species implicated in toxin transmission (transvector): | ||
| Report the outcome of a monitoring programme: | Yes (CA Department of Public Health Marine Biotoxin Monitoring Program) | |
| Event occurred before in this location: | Yes (Onset much earlier this year in Marin County. Distribution and magnitude of Southern CA event very unusual, if not unique) | |
| Individuals to contact: | LANGLOIS, Gregg | |
| Location: | Latitude: , Longitude: | |
| General location information: |
California, South Coast, Central Coast, Northern Coast HAB Area code(s): US-19 US-20 US-21 |
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| Additional location information: | 1. Santa Cruz (21): inside Monterey Bay. 2. San Luis Obispo County (20): North of Pt. Conception, encompasses Avila, Morro Bay and Cayucos. 3. Santa Barbara County (20). 4. Marin County (21) | |
| Bloom event dates (yyyy/mm/dd): | ||
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | 1. Santa cruz County: Unusual elecated PSP toxicity in late Jan. (max = 106 ug/100 g) quickly decreased below alert level by mid-Feb. Persistent low level toxicity through Sept. 2. San Luis Obispo County: Unusual winter event: PSP toxin concentrations increased from non-detect to 153 ug during the last week of Jan. decreasing below the alert level by February 20 (max = 282 ug). 3. Santa Barbara County: low level detected late January, sporadic increases above alert level in mid-Feb (133 ug) and again in mid-march. Low levels persisted through end of April. 4. Marin County: Mid-June (6/18) increase above alert level (166 ug), increasing to max of 619 ug by 6/21. Decreased below alert level by July 19; sporadic spikes above alert level in Aug., with persistent low-level toxicity through Sept. 13. | |
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Alexandrium spp.
( cells/L)
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| Co-Ocurring Species/Genus: | ||
| Chlorophyll concentration, if known: | µg/l | |
| Additional bloom information: | Alexandrium was observed at all locations experiencing PSP toxicity in shellfish. This dinoflagelate was a persistent member of the phytoplankton assemblage along the Southern CA coast for at least 13 consecutive months and was never completely absent in | |
| Event-related bibliography: | Monthly/Annual reports issued by CDPH Marine Biotoxin Monitoring Program. | |
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| Temperature Range During Event: | Max: °C, Min: °C | |||||||||||||||||||||||||
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| Kit used: Yes | Type of kit used: Jellet/AOAC for screening in l | |||||||||||
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| Economic losses: | ||||||||||||
| Management decision: | Harvest closures in commercial aquaculture areas; annual quarantine on sport-harvested mussels, Health Advisory. | |||||||||||
| Additional harmful effect information: | ||||||||||||
