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    Advanced Spatial Modeling to Inform Management of Data-Poor Juvenile and Adult Female Rays

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    Author
    Dedman, Simon
    Officer, Rick
    Brophy, Deirdre
    Clarke, Maurice
    Reid, David G.
    Keyword
    boosted regression trees
    BRT
    elasmobranch
    marine protected area
    MPA
    nursery area
    spawning ground
    ray
    Date
    2017
    Publisher
    MDPI AG
    
    Metadata
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    Abstract
    Chronic overfishing has depleted numerous elasmobranch stocks in the North East Atlantic, but addressing this issue has been hampered by management complications and lacking data. Spatial management approaches have thus been advocated. This work presents a novel application and further development of an advanced spatial modeling technique to identify candidate nursery grounds and spawning areas for conservation, by subsetting already limited data. Boosted Regression Tree models are used to predict abundance of juvenile and mature female cuckoo (Leucoraja naevus), thornback (Raja clavata), blonde (Raja brachyura), and spotted (Raja montagui) rays in the Irish Sea using fish survey data and data describing fishing pressure, predation and environmental variables. Model-predicted spatial abundance maps of these subsets reveal distinct nuances in species distributions with greater predictive power than maps of the whole stock. These resulting maps are then integrated into a single easily understood map using a novel approach, standardizing and facilitating the spatial management of data-limited fish stocks.
    URI
    http://hdl.handle.net/10793/1409
    Description
    Peer reviewed paper. Citation: Dedman, S., Officer, R., Brophy, D., Clarke, M., & Reid, D. G. (2017a). Advanced Spatial Modeling to Inform Management of Data-Poor Juvenile and Adult Female Rays. Fishes, 2(3), 12. https://doi.org/10.3390/fishes2030012 Link: https://www.mdpi.com/2410-3888/2/3/12 DOI: https://doi.org/10.3390/fishes2030012
    Citation
    Dedman, S., Officer, R., Brophy, D., Clarke, M., & Reid, D. G. (2017a). Advanced Spatial Modeling to Inform Management of Data-Poor Juvenile and Adult Female Rays. Fishes, 2(3), 12. https://doi.org/10.3390/fishes2030012
    ae974a485f413a2113503eed53cd6c53
    10.3390/fishes2030012
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