University of Maryland LibrariesDigital Repository at the University of Maryland
    • Login
    View Item 
    •   DRUM
    • Theses and Dissertations from UMD
    • UMD Theses and Dissertations
    • View Item
    •   DRUM
    • Theses and Dissertations from UMD
    • UMD Theses and Dissertations
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    A Comparison of the Biochemistry and Physiology of the Eastern Oyster, Crassostrea virginica, and the Asian Oyster, Crassostrea ariakensis

    Thumbnail
    View/Open
    umi-umd-4802.pdf (452.5Kb)
    No. of downloads: 871

    Date
    2007-08-13
    Author
    Harlan, Nicole Porter
    Advisor
    Paynter, Kennedy T
    Metadata
    Show full item record
    Abstract
    The Chesapeake Bay Foundation, US Environmental Protection Agency, and the Chesapeake Bay Commission, requested research on the introduction of the Asian oyster, Crassostrea ariakensis, to help restore the fishery and ecosystem function of the native Eastern oyster, Crassostrea virginica. In order to augment the role of C. virginica in Chesapeake Bay, C. ariakensis will likely require tolerances to low dissolved oxygen similar to that of the native oyster. This research showed that triploid and diploid C. virginica lived significantly longer than C. ariakensis under anoxic conditions, although the oxygen consumption rates of diploid oysters did not differ between species. Free amino acid pools in the gill tissue of oysters exposed to normoxia or hypoxia were analyzed. Alanine increased in both species during hypoxia, indicating the use of alternative metabolic pathways. Aspartate was consumed by C. virginica during hypoxia, confirming the use of a pathway coupling glucose and aspartate fermentation. Differences in the free amino acid pools of these two species suggest an explanation for the disparity in anaerobic metabolism between C. ariakensis and C. virginica.
    URI
    http://hdl.handle.net/1903/7386
    Collections
    • Biology Theses and Dissertations
    • MEES Theses and Dissertations
    • UMD Theses and Dissertations

    DRUM is brought to you by the University of Maryland Libraries
    University of Maryland, College Park, MD 20742-7011 (301)314-1328.
    Please send us your comments.
    Web Accessibility
     

     

    Browse

    All of DRUMCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    LoginRegister
    Pages
    About DRUMAbout Download Statistics

    DRUM is brought to you by the University of Maryland Libraries
    University of Maryland, College Park, MD 20742-7011 (301)314-1328.
    Please send us your comments.
    Web Accessibility