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Location:
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Latitude: , Longitude:
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General location information:
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Oregon Coast, Pacific NW, USA
HAB Area code(s): US-22
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Additional location information:
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Shellfish harvest areas on Clatsop and north coast beaches were open at the beginning of the year, the central coast was closed due to toxin residuals from 2004 but opened in March of 2005, and the south coast beaches remained closed from an event that began in the late 2004. The DA event of 2005 began in late April and affected the entire coast by mid-May. Another DA event occurred on the south central and south coast in Oct. 2005.
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Bloom event dates (yyyy/mm/dd):
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Start: 2005-07-01, End: 2005-07-10 |
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Quarantine levels dates (yyyy/mm/dd):
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Additional date-related information:
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Clatsop Beach on north coast of OR began the calendar year of 2005 in open status for all razor clam harvesting; commercial and recreational. Levels of DA were below 10 ppm during Jan - Mar of 2005. Then mussels and razor clams became elevated during the last week of April, rising to 11 ppm in mussels and 24 to 36 ppm in razor clams. The highest level reached for the north coast razor clams was 68 - 04/24/05 and mussels reached 128 ppm on 5/10/05 (the highest seen in Oregon mussels). Mussels dropped to <1 by the end of May. No coast razor clams remained > 20 ppm until mid-July. This area did not see another bloom in the summer or fall of 2005.
Domoic Acid levels in razor clams on the central coast beaches of Newport - Walport (rec. only) were still declining from 2004 levels but by March 2005 the area had opened. Then in late April the area was affected by a bloom similar to the impact seen on the North coast only razor clams reached levels of 213 on 05/13/05. This is near the area where Pseudo-nitzchia australis cell counts reached 632,000 cells per liter. Mussels reached the mid-20's. The razor clams were still between 20 and 40 ppm by the end of Dec. 2005.
The south coast razor clams began the year in closure but a segment off Coos Bay had opened in April when the same, coast-wide event impacted the area and razor clams and mussels were closed. Razor clams at Coos Bya reached 190 ppm on 05/24/05 and mussels reached 53 on 05/09/06. In Oct. 2005 a separate event occurred in the two southern most counties as indicated by a jump in Pseudo-nitzchia australis cells (67,000 per liter) and mussels elevated from <1 to 12 ppm DA. Toxin levels in razor clams off Gold Beach rose from 18 on 09/17/05 to 36 ppm on 10/16/05. These areas remained closed as 2005 ended.
Other species of clams-softshells and butters; were found with detectable levels of DA to as high as 7 ppm during the May event but never over 20 ppm. Detectable levels of DA were not found in oysters, coast-wide during 2005.
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