Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Theses
    • View Item
    • espace Home
    • espace
    • Curtin Theses
    • View Item

    Oceanographic processes governing the dispersal and recruitment of marine larvae off South-Western Australia

    247568_Pearce Alan deceased 2016.pdf (110.8Mb)
    Access Status
    Open access
    Authors
    Pearce, Alan Frank
    Date
    2016
    Supervisor
    Dr Peter Fearns
    Prof. Merv Lynch
    Dr Ming Feng
    Type
    Thesis
    Award
    PhD
    
    Metadata
    Show full item record
    School
    Department of Physics and Astronomy
    URI
    http://hdl.handle.net/20.500.11937/1372
    Collection
    • Curtin Theses
    Abstract

    Larval and juvenile recruitment of two Abudefduf damselfish species at Rottnest Island vary both seasonally and inter-annually. Biological and oceanographic factors together support the conjecture that the larvae originate at the Abrolhos Islands some 300 km to the north and are dispersed southwards in the Leeuwin Current. There are very strong links with environmental indices, with enhanced recruitment when the Leeuwin Current is flowing strongly and ocean temperatures are elevated, which generally occurs during La Niña events. This was especially evident during the intense La Niña event which triggered the marine heat wave of early 2011, when the Leeuwin Current was at a near record strength and local water temperatures briefly reached an unprecedented 5°C above long-term background values. Currents along the Western Australian continental shelf seasonally reverse between the northward Capes Current in summer and dominantly southward flow during the winter months. There are, however, frequent shorter-term current reversals throughout the year, and current drifter tracking reveals that drifter buoys released in relatively close proximity can be rapidly entrained into different current systems and moved in opposite directions. This has important implications for commercial and recreational fisheries as the exact timing and location of pelagic spawning events can determine the subsequent movement and ultimate destination of the eggs and larvae, whether retention on the shelf or export into the open ocean and probable loss to the fishery. Against a backdrop of progressively rising water temperatures, the potential for a possible southward range extension of Abudefduf spp. to Rottnest Island in the form of establishing a breeding population there is explored.

    Related items

    Showing items related by title, author, creator and subject.

    • Zero average current error control methods for bidirectional AC-DC converters.
      Borle, Lawrence J. (1999)
      This thesis is concerned primarily with the optimization of the current regulation in bi-directional ac-dc power converters through the use of appropriate current control methods. Following a review into prior current ...
    • A New Vibration Testing Platform for Electronic Current Transformers
      Li, Z.; Tao, Y.; Abu-Siada, Ahmed; Masoum, Mohammad Sherkat; Li, Zhenhua; Xu, Y.; Zhao, X. (2018)
      IEEE With the growing global interest in developing future smart grids, nonconventional instrument transformers have been given much attention. In contrary with the classic magnetic core current transformer, electronic ...
    • Eddy formation through the interaction between the Leeuwin Current, Leeuwin Undercurrent and topography
      Rennie, Susan; Pattiaratchi, C.; McCauley, Robert (2007)
      The surface and subsurface circulation off south-west Australia was simulated using the Regional Ocean Modelling System (ROMS), a primitive equation ocean model with terrain-following s-coordinates. The major currents in ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.