Methods of Supplementing Clam and Abalone Production, July 1, 1975 - June 30, 1976, Annual Report, July 1976

Identification Information

Citation

Originator: Gaumer, T. F. and B. G. Hastead

Publish Date: July 1976

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 distribution of clams in Oregon's estuaries continued. Maps showing survey areas, the distribution of clams, substrate type, and vegetation type are presented. Population estimates, age and size of clams were calculated for three areas of Yaquina Bay and for single areas of Tillamook and Coos bays. Age data showed an exceptionally strong survival of 1975 year class gaper clams. Commercial quantities of clams were located in each of the above bays. An aging study showed that the gaper clam could most reliably be aged by counting annuli in the chondrophore. Butter, cockle and littleneck clams were aged by counting the annuli on the exterior surface of the shell. Permits were issued for the commercial harvest of subtidal clams in Yaquina and Coos bays. Due to poor marketing conditions, the Yaquina fishery produced only 1,505 pounds (683 kg) of gaper clams, The Coos Bay fishery produced 55,482 pounds (25,166 kg) of gaper clams. The 1969 year class was prevalent in the Yaquina Bay harvest while the 1966 year class was the principal age group taken in Coos Bay. We continued to monitor growth of laboratory produced clams planted in Netarts and Yaquina bays. Population estimates showed 241 (4.3%) of the abalone planted in Whale Cove in 1967 still survive. They averaged (137.3 mm) in size.

Purpose:

Time Period of Content: July 1, 1975 - June 30, 1976

Geographic Extent: Yaquina Bay, Bay, coos, Bay

Status: Final

Use Constraints:

Format: PDF file

Data Quality Information

Lineage-Source:

Data Information

No data information was supplied.

Entity and Attribute Information

Attributes Description: Not yet described

Bibliography Information

Field Name	Value
Biblio ID	1057
Year	1976
Publisher
Request Type	Report (FCO Shellfish Pgm)
Location	Coast, OR
Date Created
Date Cataloged
Date Published	1976
Type
Pages	1-65
Volume
Status	0
Descriptor	Abalone; Clams; Harvest; Hatchery; Coast, OR
Date Entered	1/1/1999
Location In Clackamas Library
Author
Duplicates
Number Remaining After Requests	1
Presumed All Distributed
Back Room Duplicates
Author	Halstead, B.G.; Gaumer, T.F.
Risk	Hatchery; Harvest
Species
Disposition Of Requests	Tony D'Andrea: Request filled

Is a physical copy maintained for reference at Headquarters? Yes