• Login
    View Item 
    •   Marine Institute Open Access Repository
    • Marine Institute Community of Research Publications
    • Survey Reports
    • Nephrops Under Water TV Surveys
    • View Item
    •   Marine Institute Open Access Repository
    • Marine Institute Community of Research Publications
    • Survey Reports
    • Nephrops Under Water TV Surveys
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of Marine OARCommunitiesPublication DateAuthorsTitlesSubjectsThis CollectionPublication DateAuthorsTitlesSubjects

    My Account

    LoginRegister

    Statistics

    Display statistics

    Aran, Galway Bay and Slyne Head Nephrops Grounds (FU17) 2014 UWTV Survey Report and catch options for 2015.

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    Aran, Galway Bay and Slyne Head ...
    Size:
    3.432Mb
    Format:
    PDF
    Download
    Author
    Hehir, I.
    Doyle, J.
    Lordan, C.
    O'Cuaig, M.
    Hannify, O.
    Fitzgerald, R.
    O'Connor, S.
    Keith, M.
    Murphy, Á.
    Sheridan, M.
    Vila, Y.
    Keyword
    Nephrops norvegicus
    stock assessment
    geostatistics
    underwater television (UWTV)
    benthos
    CTD
    Date
    2014-10
    Publisher
    Marine Institute
    
    Metadata
    Show full item record
    Abstract
    This report provides the main results and findings of the thirteenth annual underwater television on the Aran, Galway Bay and Slyne head Nephrops grounds, ICES assessment area; Functional Unit 17. The survey was multi-disciplinary in nature collecting UWTV, fishing, CTD and other ecosystem data. In total 33 UWTV stations were successfully completed in a randomised isometric grid design at 3.5nmi or 6.5km intervals over the known range of the stock on the Aran Grounds. The mean burrow density observed in 2014, adjusted for edge effect, was 0.29 burrows/m². The final krigged burrow abundance estimate was 287 million burrows with a CV (or relative standard error) of 4 %. Abundance estimates have fluctuated considerably over the time series. The 2014 abundance estimate was 9% lower than in 2013 and the lowest estimate in the 13 year time series. Raised abundance estimates for Galway Bay and Slyne Head were also low for those areas. Using the 2014 abundance estimate together with updated parameters for mean weight and proportions of removals retained implies catch advice, fishing at Fmsy (=F35%spr), of 584 tonnes and landings of 524 tonnes in 2015. Nephrops accounted for approximately 70% of the benthic catch by weight from 5 beam trawl tows. The relatively high numbers caught around 15 CL mm (carapace length) may indicate strong incoming recruitment. Virgilaria mirabilis was the most common of the two sea-pen species observed on the UWTV footage. Funiculina quadrangularis was observed at one station on the Slyne Head Nephrops ground.
    URI
    http://hdl.handle.net/10793/989
    Citation
    Hehir, I., Doyle, J. , Lordan, C., O’Cuaig, M., Hannify, O., Fitzgerald, R., O’Connor, S., Keith, M., Murphy, A., Sheridan, M., and Vila, Y. 2014. Aran, Galway Bay and Slyne Head Nephrops Grounds (FU17) 2014 UWTV Survey Report and catch options for 2015. Marine Institute UWTV Survey report
    Collections
    Nephrops Under Water TV Surveys

    entitlement

     
    DSpace software (copyright © 2002 - 2019)  DuraSpace
    Quick Guide | Contact Us
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.