Search

Search Results

• 121. [Article] The bay clams of Oregon : their economic importance, relative abundance, and general distribution

  An average of approximately 200,000 pounds of bay clams were harvested annually in Oregon for the years 1943-49, inclusive. The commercial harvest of bay clams is composed of the gaper, cockle, and softshell ...

  Citation × Citation Citation Abstract Copy Title: The bay clams of Oregon : their economic importance, relative abundance, and general distribution Author: Oregon. Fish Commission, Marriage, Lowell D. An average of approximately 200,000 pounds of bay clams were harvested annually in Oregon for the years 1943-49, inclusive. The commercial harvest of bay clams is composed of the gaper, cockle, and softshell clams. The recreational, or noncommercial, harvest of bay clams is composed mainly of the gaper, cockle, softshell, butter, and littleneck clams, and occasionally the bent-nose, sand, geoduck, and bodega tellen clams. Recreational production is estimated for selected time periods for Yaquina, Netarts, and Tillamook Bays. A description of the common bay clams of Oregon with general information on common names, habitats, relative abundance, and method and place of harvesting is presented. A description of the bay clam producing areas in the Nehalem, Tillamook, Netarts, Nestucca, Salmon, Siletz, Yaquina, Alsea, Siuslaw, Umpqua, Coos, and Coquille Bays is presented. A discussion on the condition of the stocks of the gaper, cockle, and softshell clams is presented. Title: The bay clams of Oregon : their economic importance, relative abundance, and general distribution Author: Oregon. Fish Commission, Marriage, Lowell D. An average of approximately 200,000 pounds of bay clams were harvested annually in Oregon for the years 1943-49, inclusive. The commercial harvest of bay clams is composed of the gaper, cockle, and softshell clams. The recreational, or noncommercial, harvest of bay clams is composed mainly of the gaper, cockle, softshell, butter, and littleneck clams, and occasionally the bent-nose, sand, geoduck, and bodega tellen clams. Recreational production is estimated for selected time periods for Yaquina, Netarts, and Tillamook Bays. A description of the common bay clams of Oregon with general information on common names, habitats, relative abundance, and method and place of harvesting is presented. A description of the bay clam producing areas in the Nehalem, Tillamook, Netarts, Nestucca, Salmon, Siletz, Yaquina, Alsea, Siuslaw, Umpqua, Coos, and Coquille Bays is presented. A discussion on the condition of the stocks of the gaper, cockle, and softshell clams is presented. Close

• 122. [Article] Effects of effluents on flavor of salmon flesh : research report

  "Presented in this report are the results of research on the influence of Chipman Chemical Company effluents on the flavor and overall desirability of the flesh of coho salmon and rainbow trout. The report ...

  Citation × Citation Citation Abstract Copy Title: Effects of effluents on flavor of salmon flesh : research report Author: Oregon State University. Agricultural Experiment Station, Oregon State Sanitary Authority, Shumway, Dean L., Oregon. State Game Commission, Oregon. Fish Commission "Presented in this report are the results of research on the influence of Chipman Chemical Company effluents on the flavor and overall desirability of the flesh of coho salmon and rainbow trout. The report covers research conducted from September 1965 through February 1966." (From Introduction) Title: Effects of effluents on flavor of salmon flesh : research report Author: Oregon State University. Agricultural Experiment Station, Oregon State Sanitary Authority, Shumway, Dean L., Oregon. State Game Commission, Oregon. Fish Commission "Presented in this report are the results of research on the influence of Chipman Chemical Company effluents on the flavor and overall desirability of the flesh of coho salmon and rainbow trout. The report covers research conducted from September 1965 through February 1966." (From Introduction) Close

• 123. [Article] Growth and mortality rates of the razor clam (Siliqua patula) on Clatsop beaches, Oregon

  Clatsop Beaches, characterized by flat beach-face slope (1:70) and small sandsize (0.2 mm.), have supported commercial and recreational fisheries for the razor clam (Siliqua patula) for many years. Tracing ...

  Citation × Citation Citation Abstract Copy Title: Growth and mortality rates of the razor clam (Siliqua patula) on Clatsop beaches, Oregon Author: Hirschhorn, George, Oregon. Fish Commission Clatsop Beaches, characterized by flat beach-face slope (1:70) and small sandsize (0.2 mm.), have supported commercial and recreational fisheries for the razor clam (Siliqua patula) for many years. Tracing the linear growth of two year classes through more than one year following set led to a validation of the ring method of age determination in the population studied. Annual ring lengths based on the means of samples from all subareas were fitted by von Bertalanffy equations. Increases in total length, wet weight, and relative width showed patterns of seasonal variation. Death rates of the Seaside Beach population were estimated from recoveries of 3,379 serially marked razor clams. Mortality coefficients obtained were: 2.52 for total mortality, based on the difference between estimated population sizes in 1952 and 1953 of year classes fully recruited at the beginning of the census; 1.78 for the estimated removals by actual harvesting; and 0.74 for other losses to which fishery-connected wastage was believed to have contributed, in addition to true natural mortality. The weight yield per 1,000 recruits, as function of age at first capture, was examined at three hypothetical levels of wastage indicating that potential increases in yield at each level could be realized by deferring the exploitation of a year class until its second year of age, regardless of whether the fisheries are continuous or seasonal. Title: Growth and mortality rates of the razor clam (Siliqua patula) on Clatsop beaches, Oregon Author: Hirschhorn, George, Oregon. Fish Commission Clatsop Beaches, characterized by flat beach-face slope (1:70) and small sandsize (0.2 mm.), have supported commercial and recreational fisheries for the razor clam (Siliqua patula) for many years. Tracing the linear growth of two year classes through more than one year following set led to a validation of the ring method of age determination in the population studied. Annual ring lengths based on the means of samples from all subareas were fitted by von Bertalanffy equations. Increases in total length, wet weight, and relative width showed patterns of seasonal variation. Death rates of the Seaside Beach population were estimated from recoveries of 3,379 serially marked razor clams. Mortality coefficients obtained were: 2.52 for total mortality, based on the difference between estimated population sizes in 1952 and 1953 of year classes fully recruited at the beginning of the census; 1.78 for the estimated removals by actual harvesting; and 0.74 for other losses to which fishery-connected wastage was believed to have contributed, in addition to true natural mortality. The weight yield per 1,000 recruits, as function of age at first capture, was examined at three hypothetical levels of wastage indicating that potential increases in yield at each level could be realized by deferring the exploitation of a year class until its second year of age, regardless of whether the fisheries are continuous or seasonal. Close