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  • Columbia River Crab Studies, 1957-58

    Creator:
    Ayers, Robert J.
    Abstract:
    This report summarizes the results of crab studies undertaken during the fall of 1957 and 1958 in the Columbia River estuary. The purpose of this project was to determine the shell condition of the crabs available in this area during the period when crab fishing is prohibited in the ocean,...
    Resource Type:
    Technical Report

  • Cardiac and respiratory responses to hypoxia in the crab, Cancer magister (Dana)

    Creator:
    Stiffler, Daniel Francis
    Abstract:
    Heart rates and amplitudes were measured for both intact animals (in situ) and isolated hearts (in vitro) of the Dungeness crab, Cancer magister, exposed to low levels in oxygen. Recordings were also made of gill ventilation rate by measuring the frequency of scaphognathite (gill bailer) beats. Both the in vitro...
    Resource Type:
    Masters Thesis
    Full Text:
    Cardiac and respiratory responses to hypoxia in the crab

  • The effects of PCB exposure on the behavior of the shore crab Hemigrapsus oregonensis

    Creator:
    Pearson, Walter H.
    Abstract:
    The behavior of the shore crab Hemigrapsus oregonensis was assessed with and without exposure to polychlorinated biphenyls (Aroclor 1260). After describing the crab's behavioral repertoire, activity budgets were developed from observations of the time crabs spent in 20 categories of shelter use, posture, and activity while held in habitat replicas...
    Resource Type:
    Dissertation
    Full Text:
    EXPOSURE ON THE BEHAVIOR OF THE SHORE CRAB HEMIGRAPS'US OREGONENSIS Abstract approved: Robert L. ilolton

  • An investigation of the acoustic signature of the Dungeness crab (Cancer magister)

    Creator:
    Goode, Wesley Lyle
    Abstract:
    The acoustic signals produced by the Dungeness crab (Cancer magister) were investigated. The signals were examined for duration times and frequency content. The signals were converted from analog to digital form, and the autocorrelation functions and the power density spectrums were determined. The signals produced by Dungeness and Japanese red...
    Resource Type:
    Masters Thesis

  • Some economic considerations in Dungeness crab marketing

    Creator:
    Wix, John Robert
    Abstract:
    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...
    Resource Type:
    Masters Thesis
    Full Text:
    some economic considerations in Dungeness crab marketing

  • Some economic considerations in Dungeness crab marketing

    Creator:
    Wix, John Robert
    Abstract:
    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...
    Resource Type:
    Masters Thesis
    Full Text:
    : SOME ECONOMIC CONSIDERATIONS IN DUNGENESS CRAB MARKETING Abstract approved: The purpose of this

  • How to identify a soft-shell crab

    Creator:
    Spears, Carol J. and Oregon State University. Extension Service/Sea Grant Marine Advisory Program
    Abstract:
    Published June 1983. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the Sea Grant Catalog: http://seagrant.oregonstate.edu/publications
    Resource Type:
    Technical Report
    Full Text:
    b/j>iS/t3 S S '3 How to identify a soft-shell crab An

  • System design for Dungeness crab processing

    Creator:
    Adams, Burton Warren
    Abstract:
    Dungeness crab is an important fishery on the Pacific Coast. The processing subsystem of the fishery is hampered by a variety of problems that have acted to impede technological innovations that could improve efficiency and sanitation in seafood plants. This paper provides background for problems encountered by the processors, discusses...
    Resource Type:
    Masters Thesis
    Full Text:
    System design for Dungeness crab processing AN ABSTRACT

  • A portable pumping system for hydraulic excavation of commercial crab pots

    Creator:
    Chang, Terrill John
    Abstract:
    The design and testing of a portable pumping system for use in the hydraulic excavation of commercial crab pots buried by ocean sediment was undertaken. The resulting portable system retained the four major components of the pumping systems presently used by commercial fishermen: engine, pump, fire hose, and nozzle. Because...
    Resource Type:
    Masters Thesis
    Full Text:
    , (Date) Title: A PORTABLE PUMPING SYSTEM FOR HYDRAULIC EXCAVATION OF COMMERCIAL CRAB POTS Redacted for

  • Skill design, evaluation, and implementation of improved Dungeness crab meat extraction methods

    Creator:
    Willis, George Paul
    Abstract:
    The Dungeness crab fishery is the largest and oldest known shellfish fishery of the North Pacific coast of North America. The stability and development of this fishery is seriously hampered by increasing meat extraction costs and labor shortages. Alternative solutions to offset the increasing costs and labor shortages include: 1)...
    Resource Type:
    Masters Thesis
    Full Text:
    Dungeness crab meat extraction methods AN ABSTRACT OF THE THESIS OF George Paul Willis for the degree of