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The Labadie, Jones and Cockburn Banks Nephrops Grounds (FU20-21) 2018 UWTV Survey Report and catch scenarios for 2019.
Doyle, J.; Aristegui, M.; Hannify, O.; White, J.; Fee, D.; McCorriston, P.
This report provides the main results of the 2018 underwater television survey on the ‘Labadie, Jones and Cockburn Banks’ ICES assessment area; Functional Unit 20-21. This was the fifth survey to achieve full coverage of the full area. The 2018 survey was multidisciplinary in nature collecting UWTV, and other ecosystem data. A total of 96 UWTV stations were completed at 6 nm intervals over a randomised isometric grid design. The mean burrow density was 0.27 burrows/m2 compared with 0.44 burrows/m2 in 2017. The 2018 geostatistical abundance estimate was 2.7±0.006 billion, a 39% decrease on the abundance for 2017, with a CV of 4% which is well below the upper limit of 20% recommended by SGNEPS 2012. High densities were observed throughout the ground, and also close to boundaries. Using the 2018 abundance estimate and updated stock data implies catch of 5,320 t and landings of 4,325 t in 2019 when MSY approach is applied (assuming that discard rates and fishery selection patterns do not change from the average of 2015–2017). One species of sea-pen (Virgularia mirabilis) were recorded as present at the stations surveyed. Trawl marks were observed at 33% of the stations surveyed.
Keyword(s): Nephrops norvegicus (L.); Celtic sea; stock assessment; Geostatistics; Underwater television (UWTV); CTD; Benthos
Publication Date:
2018
Type: Other
Peer-Reviewed: Unknown
Language(s): English
Institution: Marine Institute
Citation(s): Doyle, J., Aristegui, M., Hanniffy, O., White, J., Fee, D., and McCorriston, P. 2018. The Labadie, Jones and Cockburn Banks Nephrops Grounds (FU20-21) 2018 UWTV Survey Report and catch scenarios for 2019. Marine Institute UWTV Survey report.
Publisher(s): Marine Institute
First Indexed: 2018-11-09 07:00:05 Last Updated: 2018-11-09 07:00:05