Event name: | US-05-001 | |
Country: | UNITED STATES | |
Nature of the harmful event: |
High Phyto concentration , Seafood toxins , Mass mortalities | |
Event directly affected: |
Shellfish , Aquatic Mammals | |
Toxicity detected: | Yes (Approximate range: 31 - 290 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 Health Services Marine Biotoxin Monitoring Program) | |
Event occurred before in this location: | Yes (Late spring/early summer event in central/southern California typical over the past four 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. Offshore of Santa Barbara County (19) and Ventura County.: South of Pt. Conception 2. Humboldt County (21): Northern California. 3. Del Norte County, Northern California, borders Oregon. | |
Bloom event dates (yyyy/mm/dd): | Start: 2005-03-01, End: 2005-07-01 | |
Quarantine levels dates (yyyy/mm/dd): | ||
Additional date-related information: | 1. Santa Barbara: DA levels low to moderate (2-15 ppm) throughout June at site .75 miles offshore.exceed alert level by late April through early May: 87 ppm in mussels and 26 ppm in pacific oysters. Santa Barbara and Ventura counties, offshore near Channel Islands: alert levels of DA in lobster viscera in October (290 ppm) 2. Del Norte County: DA concentration above alert level detected by mid October: 42 ppm in mussels. |
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. Santa Barbara/Ventura counties: Evidence of persistent offshore bloom of Pseudo-nitzschia in samples from volunteer network. Low cell numbers at near shore sites. DA toxin levels mirrored this pattern. | |
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 | ||||||||||||||||||||||||||
Additional Environmental information: |
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Kit used: Yes | Type of kit used: Jellet rapid extraction kit us | ||||||||||||||||||||||||||
Additional information: | |||||||||||||||||||||||||||
Economic losses: | |||||||||||||||||||||||||||
Management decision: | Harvest closures in commercial aquaculture areas; Health Advisory for sportharvesting of shellfish in Northern California. | ||||||||||||||||||||||||||
Additional harmful effect information: | HPLC |