Ana1ysis of January to March samples of gaper clam larvae from Yaquina Bay, Oregon have established four hypotheses for further testing: 1) gaper clams have an approximately lunar cycle of spawning intensity with maximum production of larvae at the periods of greatest tidal amplitude, 2) the time required for development...
In addition to clam fisheries statistics and results of interviews with recreational clam diggers, this report contains brief mention of native oyster (Ostrea lurida) enhancement activities in Netarts and Alsea bays.
In addition to statistics on bay clams, the report includes information about a program to replant native Olympia oysters in Netarts and Alsea bays and to enhance native oyster habitat in Yaquina Bay.
In addition to statistics on bay clams, this report includes information about a program to reintroduce native Olympia oysters (Ostrea lurida / Ostrea conchaphila) from Yaquina Bay into Alsea and Netarts bays.
Numerous statistics, including data from interviews with recreational clam diggers. Reports on test plots of the introduced Manila clams (Venerupis philippinarum) in Coos and Yaquina bays. Reports on subtidal surveys of Yaquina Bay and intertidal surveys of Netarts Bay.
In addition to statistics on bay clams, the report mentions an effort to plant native (Olympia) oysters (Ostrea lurida / Ostrea conchaphila) in Netarts Bay.
In 1976, the Oregon Department of Fish and Wildlife Commission approved regulation changes for the sport harvest of bay clams. The changes were made at the request of the shellfish staff; our concern was the gradual deterioration in the status of the stocks as reflected in annual census work on...