Harmful Algal Information System: Event US-93-010

General Information

Event name:	US-93-010
Country:	UNITED STATES
Nature of the harmful event:	Seafood toxins
Event directly affected:
Toxicity detected:	Yes (Approximate range: 23 ppmDA edible tissue of razor clams.)
Associated syndrome:	ASP
Unexplained toxicity:	No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme:	Yes
Event occurred before in this location:	Yes (October 1991 - June 1992.)
Individuals to contact:	McCALLUM, Mary

Location:	Latitude: , Longitude:
General location information:	, Washington. HAB Area code(s): US-23
Additional location information:	Domoic acid occurred in razor clams on Pacific coast beaches.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:	April-December.

Causative organism known:	No
Causative Species/Genus:
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known:	µg/l
Additional bloom information:	Unknown, but Pseudonitzschia pungens, P. australis, and P. pseudodelicatissima were found in coastal water in November.
Event-related bibliography:

Nutrient information:

Temperature Range During Event:

Max: °C, Min: °C

Salinity Range During Event:

Bloom location in the water column:

Growth:

Growth Comments

Unknown.

Additional Environmental information:

Coastal surf zone.

Species containing the toxin	Toxin type	Toxin details	Max. concentration	Assay type
Razor clams (edible tissue)	Domoic Acid	DA eq	17 ppm	Bioassay-Mouse
Razor clams (edible tissue)	Domoic Acid	DA eq	23 ppm	Bioassay-Mouse

Kit used: No

Type of kit used:

Additional information:

17 ppm in edible tissue of Razor clams in April and 23 ppm in November.

Economic losses:

Management decision:

Partial closure of recreational razor clam fishery during scheduled spring and fall harvest seasons.

Additional harmful effect information:

Toxicity in Pacific razor clams, Siliqua patula.