| Event name: | US-04-004 | |
| Country: | UNITED STATES | |
|
Nature of the harmful event: |
High Phyto concentration , Seafood toxins | |
|
Event directly affected: |
Shellfish | |
| Toxicity detected: | Yes (Approximate range: 81 - 1602 µg/100 g tissue) | |
| Associated syndrome: | PSP | |
| 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 (The length of time (months) associated with low level toxicity was unusual) | |
| Individuals to contact: | LANGLOIS, Gregg | |
| Location: | Latitude: , Longitude: | |
| General location information: |
Central Coast, California HAB Area code(s): US-20 US-21 |
|
| 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 County (21): North of Monterey, includes shoreline in Monterey Bay and open coast.3. Marin County (21): North of Golden Gate (San Francisco). | |
| Bloom event dates (yyyy/mm/dd): | ||
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | March-July 1. San Luis Obispo County: Low level PSP toxicity Jan - March. Alert level exceeded late March (535 ug), declining below alert level by early April and below detection limit by late April. Low level toxicity returned mid-October, increased above alert level early December (248 ug) through late December (94 ug).2. Santa Cruz County: Low level PSP toxicity in early June, exceeding alert level by mid-July. Max concentration by late July (770 ug), declining below detection limit by mid-August.3. Marin County: Low level PSP toxicity in early June, exceeding alert level by June 30 (129 ug). Peak concentration (1602 ug) reached by July 7, declining below alert level by mid-July. Low levels persisted through December. | |
| 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: | 1. San Luis Obispo County: Highest relative abundance of Alexandrium observed by volunteer network in mid-March and mid-December, associated with increasing/peak toxicity.2. Santa Cruz County: Highest relative abundance of Alexandrium observed in mid to l | |
| Event-related bibliography: | Monthly/Annual reports issued by CDHS Marine Biotoxin Monitoring Program | |
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| Nutrient information: | ||||||||||||||||||||||||||
| Temperature Range During Event: | Max: °C, Min: °C | |||||||||||||||||||||||||
| Salinity Range During Event: | ||||||||||||||||||||||||||
| Bloom location in the water column: | ||||||||||||||||||||||||||
| Growth: | ||||||||||||||||||||||||||
| Growth Comments | ||||||||||||||||||||||||||
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| Kit used: No | Type of kit used: | |||||||||||||||||||||
| Additional information: | Jellet/AOAC for screening in lab | |||||||||||||||||||||
| Economic losses: | ||||||||||||||||||||||
| Management decision: | Harvest closures in commercial aquaculture areas; annual quarantine on sport-harvested mussels. | |||||||||||||||||||||
| Additional harmful effect information: | Toxin levels detected in shellfish, primarily mussels | |||||||||||||||||||||
