| Event name: | US-91-015 | |
| Country: | UNITED STATES | |
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Nature of the harmful event: |
Seafood toxins | |
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Event directly affected: |
Humans | |
| Toxicity detected: | Yes | |
| Associated syndrome: | ASP | |
| Unexplained toxicity: | No | |
| Species implicated in toxin transmission (transvector): | Razor clams and Dungeness crab. | |
| Report the outcome of a monitoring programme: | Yes | |
| Event occurred before in this location: | No | |
| Individuals to contact: | HORNER, Rita | |
| Location: | Latitude: , Longitude: | |
| General location information: |
Pacific coasts of Oregon and Washington., Oregon and Washington. HAB Area code(s): US-22 US-23 |
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| Additional location information: | ||
| Bloom event dates (yyyy/mm/dd): | ||
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | Probably October-November. | |
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Pseudo-nitzschia australis
( cells/L)
Probably |
|
| Co-Ocurring Species/Genus: | ||
| Chlorophyll concentration, if known: | µg/l | |
| Additional bloom information: | Presumed to bePseudo-nitzschia australis Frenguelli. Cultures from Oregon/Washington have not yet produced domoic acid; few phytoplankton samples are available, cell concentrations not known. | |
| Event-related bibliography: | ||
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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 | Not known, but may be part of a similar bloom in central California. | |||||||||||||||||||||||||
| Additional Environmental information: | Not known, but there are indications that water temperature is higher than usual. | |||||||||||||||||||||||||
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| Kit used: No | Type of kit used: | ||||||||||||||||
| Additional information: | Toxin assays done by U.S. Food and Drug Administration and National Marine Fisheries Service using acid or methanol extraction followed by HPLC (same method used in Canadian studies) | ||||||||||||||||
| Economic losses: | |||||||||||||||||
| Management decision: | Closure of commercial and recreational harvest of razor clams on Oregon/Washington beaches; closed commmercial fishery for Dungeness crabs from northern California to northern Washington for nearly a month; spring, 1992, recreational harvest for razor | ||||||||||||||||
| Additional harmful effect information: | Razor clams are still toxic in mid-March 1992 with domoic acid levels of 30-60 ppm (regulatory closure level is 20 ppm); most toxin was found in the edible parts of the clams rather than in the viscera, but in crabs, most toxin was found in the viscera wi | ||||||||||||||||
