This document summarizes investigations of the effluent discharge from a nearby pulp mill into Coos Bay. It discusses discovery of the discharge, but focuses on its effects on gaper clams in the bay.
"The Pacific Coast oyster industry is dependent upon imported oyster seed from Japan. Inconsistent quantity and quality of the imported seed is limiting growth and expansion of the oyster industry while the demand for marketable oysters is increasing. The development of oyster hatcheries on the Pacific Coast could provide the...
"The first year of the project was devoted to developing laboratory spawning and larval rearing techniques for Pacific Coast clams and oysters. The objectives of the past year were to: (1) refine these spawning and rearing techniques to achieve higher larval survival to the adult form and (2) initiate growth...
During the 1969-70 project year emphasis was placed on spawning and rearing clams which had not been previously spawned successfully. Salinity-temperature tolerances were determined for the laboratory-reared clam larvae. Field studies comparing growth of laboratory-reared and imported Pacific and Kumamoto oysters were continued. In addition, studies comparing various methods of...
This report is an update of shellfish investigations from April 1967 to March 1970. It includes the results of bay clam surveys for Yaquina, Siuslaw, and Umpqua bays, and harvest numbers for razor clams in both personal-use and commercial fisheries. This report also contains a summary of beach surveys for...