• Login
    View Item 
    •   CIB Repository
    • CORE TEAM RESEARCH OUTPUTS
    • RESEARCH: Robertson, M
    • View Item
    •   CIB Repository
    • CORE TEAM RESEARCH OUTPUTS
    • RESEARCH: Robertson, M
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Predicting the potential distribution of invasive silver carp Hypophthalmichthys molitrix in South Africa

    Thumbnail
    View/Open
    Robertson_AfrJAquSci_2014.pdf (753.3Kb)
    Date
    2014
    Author
    Lübcker, N.
    Zengeya, T.A.
    Dabrowski, J.
    Robertson, M.P
    Format Extent
    771449 bytes
    Metadata
    Show full item record
    Abstract
    Predicting the potential geographical distribution and spread of non-native species is of major concern to ecologists. Silver carp Hypophthalmichthys molitrix, ranked as one of the world’s 100 worst invasive species, were introduced into South Africa in 1975, but the potential spread of this invader has not yet been addressed, despite recent studies indicating its potential ecological impacts in South Africa. The potential range of silver carp in South Africa was identified based on ecological niche modelling (ENM) using the maximum entropy method. Models were constructed using occurrence records and a defined background, and calibrated using a k-fold method. The area under the receiver operating characteristics curve (AUC) was used to evaluate model performance. Both the native and introduced range model accurately predicted species occurrences (AUC 0.98 and 0.94, respectively). Most of the north-eastern part of South Africa, including the Limpopo River Basin, where the presence of silver carp has been recorded, was correctly predicted as climatically suitable for silver carp. Other areas with suitable climatic conditions for silver carp but with no known introductions were also identified. The model demonstrated the potential use of ENM to predict the potential range of silver carp in South Africa.
    URI
    http://hdl.handle.net/123456789/1660
    Collections
    • RESEARCH: Robertson, M [47]

    DSpace software copyright © 2002-2016  DuraSpace
    Contact Us | Send Feedback
     

     

    Browse

    All of CIB RepositoryCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsBy Date CreatedThis CollectionBy Issue DateAuthorsTitlesSubjectsBy Date Created

    My Account

    LoginRegister

    Statistics

    View Usage Statistics

    DSpace software copyright © 2002-2016  DuraSpace
    Contact Us | Send Feedback