| Event name: | US-07-001 | |
| Country: | UNITED STATES | |
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Nature of the harmful event: |
High Phyto concentration , Seafood toxins , Mass mortalities | |
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Event directly affected: |
Natural Fish , Shellfish , Aquatic Mammals | |
| Toxicity detected: | Yes (Approximate range: 1 - 169 ug/g tissue) | |
| Associated syndrome: | ASP | |
| Unexplained toxicity: | ||
| Species implicated in toxin transmission (transvector): | ||
| Report the outcome of a monitoring programme: | Yes (California Department of Public Health Marine Biotoxin Monitoring Program) | |
| Event occurred before in this location: | Yes (Early spring/early summer event in central/southern California typical over the past several years) | |
| 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, 3, 4. Santa Barbara, Ventura, Los Angeles counties (19): South of Pt. Conception. 2. San Luis Obispo County (20) | |
| Bloom event dates (yyyy/mm/dd): | Start: 2007-03-03, End: 2007-04-01 | |
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | 1. Santa Barbara County: First detection of DA on March 15 following observed increase in Pseudo-nitzschia on March 5. Alert level exceeded by April 11 (62 ppm), with maximum measured concentration of 610 ppm reached by April 24 (A new CA record for DA levels in mussels). DA levels in mussels did not decline below the alert level until May 15. Low levels of DA persisted through the end of May. Elevate DA concentrations also detected in aquacultured Pacific oysters (59 ppm, Santa Barbara), brown rock crab viscera (110 ppm, Santa Rosa Island) and spiny lobster viscera (136 ppm, Santa Cruz Island). 2. Synchronous with the SB event, low concentration of DA detected on March 20, exceeded the alert level by April 4. Maximum concentration was 30 ppm on April 20, declining below alert level by April 25. 3. Ventura County: Continuation of SB event, DA exceeded alert level by April 19 (237 ppm). Declined below alert level by May 8. 4. LA County: Continuation of SB-Ventura pattern. Brief increase above alert level by April 27 (26 ppm), decreasing by May. | |
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Pseudo-nitzschia spp.
( cells/L)
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| Co-Ocurring Species/Genus: | ||
| Chlorophyll concentration, if known: | µg/l | |
| Additional bloom information: | 1-4. Santa Barbara/SLO/Ventura/LA Counties: Samples from volunteer monitoring network caught dramatic increase in Pseudo-nitzschia at Pismo Pier (SLO, March 3) and at Ellwood Pier (SB, March 6). Cell numbers continued to increase through April. Southwar | |
| Event-related bibliography: | Monthly/Annual reports issued by CDHS Marine Biotoxin Monitoring Program. | |
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| Temperature Range During Event: | Max: °C, Min: °C | |||||||||||||||||||||||||
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| Bloom location in the water column: | ||||||||||||||||||||||||||
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| Kit used: Yes | Type of kit used: Jellet rapid extraction kit us | |||||||||||
| Additional information: | HPLC | |||||||||||
| Economic losses: | ||||||||||||
| Management decision: | Harvest closures in commercial aquaculture areas; Health Advisory for sportharvested shellfish and viscera of sardine, anchovy, crab and lobster in Southern California. | |||||||||||
| Additional harmful effect information: | ||||||||||||
