Methods of Supplementing Clam and Abalone Production, Completion Report July 1, 1973 - June 30, 1976

Identification Information

Citation

Originator: Gaumer, Thomas F.

Publish Date: 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 clam and abalone resources of Oregon were conducted to determine if these resources could be supplemented by artificial means to increase production. Clam surveys consisted of mapping the distribution of clams in each of our estuaries using a system of transects across the tideflat. Similar transects, using scuba, were made in the channel areas. Population estimates, ages and sizes of clams were determined for areas containing dense clam populations in Tillamook, Yaquina and Coos bays. The surveys showed commercial quantities of clams in each of these bays. As a result, special commercial clam harvesting permits were issued for Yaquina and Coos bays to evaluate the effects of a commercial fishery on the habitat and clam resources. A haplosporidian infection of the gaper clam, Tresus capax, was documented subtidally from a number of Oregon's estuaries. A joint study with Oregon State University was initiated to study this problem. The release of laboratory produced clams in selected areas of several estuaries produced discouraging results. Scouring of the substrate material at most of the release sites appeared to be the main problem. Statistical tests showed the gaper clam could most reliably be aged by counting annuli in the chondrophore. Butter, Saxidomus giganteus, cockle, Clinocardium nuttallii, and littleneck, Venerupis staminea, clams were aged by counting the annuli on the exterior surface of the shell. An estimated 241 (4.3%) of the red abalone, Haliotis rufesoens, planted (at 5-20 mm) in Whale Cove in 1967 still survive. They averaged 137.3 mm in size by 1975.

Purpose:

Time Period of Content: July 1, 1973 to June 30, 1976

Geographic Extent: Not Available

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 1-86-R

Data Information

No data information was supplied.

Entity and Attribute Information

Attributes Description: Field attribute information is available in the attached file(s).

Bibliography Information

Field Name	Value
Biblio ID	1058
Year	1976
Publisher
Request Type	Report (FCO Shellfish Pgm)
Location	Coast, OR
Date Created
Date Cataloged
Date Published	1976
Type
Pages	1-13
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
Presumed All Distributed
Back Room Duplicates
Author	Gaumer, T.F.
Risk	Hatchery; Harvest
Species
Disposition Of Requests	Tony D'Andrea: Request filled

Is a physical copy maintained for reference at Headquarters? Unknown