MetaData for Commercial Clam Production Annual Report October 1, 1980 to September 30, 1981
Commercial Clam Production Annual Report October 1, 1980 to September 30, 1981
Identification Information
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Citation
- Originator: Gaumer, Thomas F. and Richard M. Starr
- Publish Date: 1982
- Online Link:
None
- BPA Project #:
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Contact Information
- Agency: Oregon Department of Fish and Wildlife
- Name: Cedric Cooney
- Job Position: Natural Resources Data and Systems Manager
- Telephone: 503-947-6094
- E-Mail Address: cedric.x.cooney@odfw.oregon.gov
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Description
- Abstract: Studies on the assessment of harvest potential in Yaquina Bay continued. Population and biomass estimates, age and size of clams were calculated for
an area in Yaquina Bay having commercial harvest potential. Our data revealed
that the 1975 year-class continued strong with over 88% of the gapers sampled
of this age. Approximately 2.5 million pounds (1,165.4 mt) of gapers were
estimated for the area and a harvest quota of 250,000 pounds (113.4 mt) was
established.
We calculated estimates of natural mortality for eight year-classes of
gaper clams in Yaquina Bay and they ranged from 0.12 to 0.89.
Due to poor markets, none of the three Yaquina Bay commercial clam fishermen
landed clams in 1981. This was the second consecutive year of no harvest. In 1979, 74,565 pounds (33.8 mt) were taken.
In Coos Bay 61,955 pounds (28.1 mt) of clams were harvested. Of this
total, 59,751 pounds (27.1 mt) Or 96.4% were gaper clams. Production figures
showed that 272 pounds (0.1 mt) were taken/hour.
Post harvest surveys revealed significant differences in population densities,
at the 95% confidence level, for recruitment of macoma and littleneck
clams in the treatment and control sites. Amphipods and anemones were also
similarly impacted. In general, all species of clams have revealed poor survival
of recruitment in Yaquina Bay since 1975.
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- Purpose:
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- Time Period of Content: October 1, 1980 to September 30, 1981
- Geographic Extent: Oregon
- Status: Final
- Use Constraints:
- Format: PDF
Data Quality Information
- Lineage-Source: National Marine Fisheries Service, National Oceanic and Atmospheric Administration, United States Department of Commerce, Commercial Fisheries Research and Development Act, Project Number 1-150-R-2 Segment 2 Contract Number 81-ABD-ORAB.
Data Information
- No data information was supplied.
Entity and Attribute Information
- Attributes Description: Field attribute information is available in the attached file(s).
Is a physical copy maintained for reference at Headquarters?
Yes
Files
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