Commercial Clam Development, October 1, 1979 to September 30, 1980, Annual Report

Identification Information

Citation

Originator: Gaumer, T. F. and G. P. Robart

Publish Date: 1980

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: Population and biomass estimates and age and size of clams were calculated for an area in Yaquina Bay having commercial harvest potential. The data revealed that the 1975 year class remained strong for gaper clams. Approximately 4.3 million pounds (1,934.5 mt) of gapers were estimated for the area and a harvest quota of 200,000 pounds (90.7 mt) was established. Estimates of natural mortality was calculated for six year classes of gaper clams in Yaquina Bay and ranged from 0.12 to 0.89. Due to difficulties clam harvesters had in getting U.S. Army Corp of Engineers and Division of State Lands permits for Yaquina Bay, no clams were harvested in 1980. This compares to a harvest of 74,565 pounds (33.8 mt) in 1979. In Coos Bay 60,741 pounds {27.5 mt) of clams were harvested. Production figures showed that 273 pounds (0.1 mt) were taken/hour. Post harvest surveys showed no significant difference, at the 95% confidence level, in numbers of clam set settling out in the treatment areas and control sites. The same was true for 17 other taxa of benthic invertebrates sampled. Analysis of variance also showed no significant difference in taxonomic diversity in the treatment and control plots.

Purpose:

Time Period of Content: October 1, 1979 to September 30, 1980

Geographic Extent: Yaquina 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	1317
Year	1980
Publisher
Request Type	Report (FCO Marine Fish Pgm)
Location	Salem HQ
Date Created	Dec 1980
Date Cataloged	8/3/05
Date Published	1980
Type	stp crnr
Pages	1-23
Volume
Status	2
Descriptor	Clams; commercial Harvest; Coast, OR
Date Entered	2005-08-03 00:00:00
Location In Clackamas Library	Wildllife/marine life
Author	Thomas F Gaumer; Gregory P Robart
Duplicates	0
Number Remaining After Requests	1
Presumed All Distributed
Back Room Duplicates
Author	Gaumer, T.F.; Robart, G.P.
Risk	Harvest
Species
Disposition Of Requests	Jean McCrae - 2: Request filled
Disposition Of Requests	Tony D'Andrea: Request filled

Is a physical copy maintained for reference at Headquarters? Yes