The purpose of this study is to describe Dungeness crab marketing from the ocean floor to the ultimate consumer; to identify relations among the Oregon Dungeness crab industry, the Pacific Coast Dungeness crab industry, and the Alaska King crab industry; and to specify the relationships between fishermen's prices for Dungeness crab and levels of Oregon production1 levels of total U.S. Dungeness crab production, levels of King crab production, and King crab prices. Primary data were gathered from fishermen, processors, state fish agencies, and the Bureau of Commercial Fisheries. Secondary sources were utilized to gain general information on King crab fishing and processing. Dungeness crab is usually sold by fishermen to processors. Processors generally sell the crab through brokers to fish wholesalers, but they may also sell directly to fish wholesalers or retailers. A definite seasonal trend was found in prices received by fishermen. However, cyclical movements have a much greater impact upon absolute price levels received by fishermen. Total catch of Dungeness crab and King crab prices were found to play important roles in determining prices received by Oregon Dungeness crab fishermen. It is concluded from the analysis that: (1) an industry-wide commission is needed to advertise and promote Dungeness crab products; (2) the ocean fishing season should be opened January 1 instead of December 1 of each year; (3) processors should endeavor to expand into new marketing areas to increase demand for their products;(4) grades and quality standards should be established; and (5) further research is needed in the technological, biological, and economic aspects of Dungeness crab production and marketing. / Graduation date: 1967

Thesis (Ph. D.)--College of William and Mary. / Vita. Bibliography: leaves 106-142. Also available via the World Wide Web.

Thesis (Ph. D.)--University of Washington, 2006. / Vita. Includes bibliographical references (leaves 95-104).

Thesis (M.Sc.)--College of William and Mary. / Vita. Includes bibliographical references.

A rapid gas liquid chromatographic method was adapted to processed Dungeness crab for the determination of basic and neutral volatiles. Methylamine, dimethylamine, and trimethylamine were measured in processed Dungeness crab for the first time. Generally, the range for trimethylamine was 42 ppm for frozen crab to 700 ppm for iced crab. Low levels of dimethylamine were found in iced and frozen samples whereas higher levels (33-71 ppm) were found in canned and iced-canned samples. Ammonia, methyl sulfide, acetaldehyde, acetone, diacetyl, benzene, and toluene were also identified in processed Dungeness crab for the first time. / Graduation date: 1973

Osmotic and ionic regulation was studied in the Dungeness crab, Cancer magister, after acute exposure to a range of five salinities from 25% to 125% sea water (100% = 32%). Blood, urine and muscle tissue were sampled at 24 and 48 hours after exposure. Analyses were made of blood and urine osmotic concentrations, as well as blood and urine sodium, potassium, calcium, and chloride ion concentrations. Data were also obtained for these ions and the total amino nitrogen (ninhydrin positive substances) in muscle tissue from crabs at the experimental salinities. Measurements of muscle extracellular space (interfiber water) and blood volume were determined with inulin-C¹⁴. In dilute sea water, blood is hyperposmotic to the medium but remains isosmotic at 100% sea water. Urine is slightly blood hypoosmotic over the salinity range. Hyperregulation is also demonstrated for the blood cations: sodium, potassium, and calcium. Blood chloride, however, is weakly regulated and the blood:medium gradient is low. Urine cation concentrations are blood hypoionic in the salinities of 75% and 100% sea water compared to 25% and 50% sea water where they are isoionic, Urine chloride is isoionic in 75% and 100% sea water, but blood hyperionic in 25% and 50% sea water. Increases in tissue water content as well as muscle extracellular (interfiber water) space occur when crabs are placed in dilute sea water. The inulin extracellular space is 7.3% in 100% sea water and this is lower than the chloride spaces (18%). Reductions in muscle ions concentrations and free amino nitrogen compounds occur. The blood:tissue gradient for potassium indicates intracellular regulation of this ion, while no regulation of sodium and chloride is found. Decreases in free amino nitrogen compounds in dilute sea water do not contribute significantly to decreases in cell volume through loss of osmotically active nonelectrolytes in the muscle. In concentrated sea water (125%), there is some indication of blood hypoosmotic regulation while urine is regulated blood hypoosmotic, The pattern of blood sodium, potassium and chloride regulation suggests slight hypoionic regulation. Urine sodium and potassium are significantly blood hypoionic, while urine chloride is isoionic. Muscle tissue in crabs at 125% sea water indicate decreases in tissue water content, muscle sodium and muscle chloride in comparison to controls. Muscle potassium is regulated. Large increases in free amino nitrogen compounds are noted in muscle from crabs at this stress, and appear to indicate intracellular compensation for the cells to tolerate increased osmotic concentration. / Graduation date: 1972

Graduation date: 1972

Typescript. / Thesis (Ph. D.)--University of Hawaii, 1967. / Bibliography: leaves [183]-186. / xi, 262 l illus., maps, tables

Thesis (M.S.)--Humboldt State University, 2006. / Includes bibliographical references (leaves 66-68). Also available via Humboldt Digital Scholar.

Thesis (M.S.) --North Carolina State University. / Includes vita. Includes bibliographical references (p. 36-38). Also available online (PDF).