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Please use this identifier to cite or link to this item: http://hdl.handle.net/10793/1137

Title: The Labadie, Jones and Cockburn Banks Nephrops Grounds (FU2021) 2015 UWTV Survey Report and catch options for 2016
Authors: Lordan, C.
Doyle, J.
Fitzgerald, R.
O’Connor, S.
Blaszkowski, M.
Stokes, D.
Ni Chonchuir, G.
Gallagher, J.
Butler, R.
Sheridan, M.
Simpson, S.
Blandon, A.
Meakins, B.
Keywords: Nephrops norvegicus
Celtic Sea
stock assessment
geostatistics
underwater television (UWTV)
CTD
benthos
Issue Date: 2015
Publisher: Marine Institute
Citation: Lordan, C., Doyle, J., Fitzgerald, R., O’Connor, S., Blaszkowski, M., Stokes, D., Ni Chonchuir,G., Gallagher, J., Butler, R., Sheridan, M. ,Simpson, S., Blandon A. and Meakins, B. 2015.The Labadie, Jones and Cockburn Banks Nephrops Grounds (FU20-21) 2015 UWTV SurveyReport and catch options for 2016. Marine Institute UWTV Survey report.
Series/Report no.: Marine Institute UWTV Survey;
Abstract: This report provides the main results of the 2015 underwater television survey on the ‘Labadie, Jones and Cockburn Banks’ ICES assessment area; Functional Unit 20-21. This was the second survey to achieve full coverage of the full area. The 2015 survey was multidisciplinary in nature collecting UWTV, CTD and other ecosystem data. A total of 96 UWTV stations were completed at 6 nmi intervals over a randomised isometric grid design. The mean burrow density was 0.20 burrows/m2 compared with 0.19 burrows/m2 in 2014. The 2015 geostatistical abundance estimate was 2.0±0.02 billion a 2% decrease on the abundance for 2014 with a CV of 3% which is well below the upper limit of 20% recommended by SGNEPS 2012. Highest densities were general observed towards the north and southwest of the ground, and there were also high densities observed close to boundaries. Using the 2015 abundance estimate and updated stock data implies catch of 3045 tonnes and landings of 2225 tonnes. Only one species of sea pen Virgilaria mirabilis was recorded as present at the stations surveyed. Trawl marks were observed at 30% of the stations surveyed.
URI: http://hdl.handle.net/10793/1137
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