Oyster Mortality Study, Annual Report April 1, 1969 - March 30, 1970

Identification Information

Citation

Originator: Gibson, Gary G.

Publish Date: 1970

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: Oyster mortality data collected from suspended trays at four subtidal locations in Yaquina Bay revealed an 8.6% Pacific oyster mortality (Crassostrea gigas) and 26.5% mortality of native oysters (Ostrea lurida) during the study year. Low salinity stress caused about one-third of the Pacific oyster mortality and about three-fourths of the mortality of native oysters. A 2.1 and 6.9% Pacific oyster mortality occurred at the intertidal stations in Tillamook and Coos bays, respectively. A shell growth of yearling Pacific oysters in Yaquina Bay occurred almost entirely during the 6-month periods, April - September 1968 and 1969. Oysters at one upper bay location grew significantly better than the oysters in the other areas tested. We prepared a total of 711 oysters for histological examination. Hydrographic data collected from Yaquina Bay reflect expected tidal and seasonal patterns. Since the identification of a neoplastic disease in native oysters and mussels in Yaquina Bay, we have collected and sent live shellfish to the Bureau of Commercial Fisheries laboratory in Oxford, Maryland, for analysis. An October 1969 native oyster sample disclosed a 40% incidence of the disease; however, monthly samples from the native oyster beds in Yaquina Bay reveal generally low mortality rates. Pacific oysters are being maintained in Yaquina Bay from seed plantings of 1962 (8 years old), 1963, 1964, and 1965 to gain information on the longevity of this species.

Purpose:

Time Period of Content: April 1, 1969 - March 30, 1970

Geographic Extent: Not Available

Status: Final

Use Constraints:

Format: PDF

Data Quality Information

Lineage-Source: U.S. Department of the Interior Fish and Wildlife Service Bureau of Commercial Fisheries Contract No. 14-17-0001-2112

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	1017
Year	1970
Publisher
Request Type	Report (FCO Shellfish Pgm)
Location	Coast, OR
Date Created
Date Cataloged
Date Published	1970
Type
Pages	1-19
Volume
Status	0
Descriptor	Pacific oyster; Coast, OR
Date Entered	1/1/1999
Location In Clackamas Library
Author
Duplicates
Number Remaining After Requests
Presumed All Distributed
Back Room Duplicates
Author	Gibson, G.G.
Risk
Species
Disposition Of Requests	Tony D'Andrea: Requested, but no copies available

Is a physical copy maintained for reference at Headquarters? Unknown