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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
Citation
Originator: Gaumer, Thomas F. and Richard M. Starr
Publish Date: 1982
Online Link: None
BPA Project #:
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
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.

Purpose:

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
File Name File Type Category File Uploaded File Description
Gaumer.1982.Commercial clam production.pdf Document File 7/20/2022 2:11:27 PM

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