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dc.contributor.authorLordan, C.
dc.contributor.authorDoyle, J.
dc.contributor.authorFitzgerald, R.
dc.contributor.authorO’Connor, S.
dc.contributor.authorBlaszkowski, M.
dc.contributor.authorStokes, D.
dc.contributor.authorNi Chonchuir, G.
dc.contributor.authorGallagher, J.
dc.contributor.authorButler, R.
dc.contributor.authorSheridan, M.
dc.contributor.authorSimpson, S.
dc.date.accessioned2015-11-04T14:23:54Z
dc.date.available2015-11-04T14:23:54Z
dc.date.issued2015
dc.identifier.citationLordan, C., Doyle, J., Fitzgerald, R., O’Connor, S., Blaszkowski, M., Stokes, D., Ni Chonchuir, G., Gallagher, J., Butler, R., Sheridan, M. and Simpson, S. 2015. FU19 Nephrops grounds 2015 UWTV Survey report and catch options for 2016. Marine Institute UWTV Survey report.en_GB
dc.identifier.urihttp://hdl.handle.net/10793/1096
dc.description.abstractThis report provides the main results of the sixth underwater television survey of the various Nephrops patches in Functional Unit 19. The survey was multi-disciplinary in nature collecting UWTV, CTD, multi-beam and other ecosystem data. In 2015 a total 39 UWTV stations were successfully completed. The mean density estimates varied considerably across the different patches. The 2015 raised abundance estimate of 482 million burrows was a 24% decrease from the 2014 estimate. Taking into account the uncertainty (CV of 13%) there is no significant difference in abundance estimates since 2011. Using the 2015 abundance estimate and recent mean weights and discard parameters would imply total catches of 793 t fishing at Fmsy in 2016. This stock will be subject to the landing obligation in 2016 and the calculation of catch options assume that all catches will be landed in 2016. The catch can be partitioned into landings of 543 t and discards of 250 t. The estimated discards rates in FU19 are relatively high and impact of this on the catch options is discussed. One species of sea pen was observed; Virgularia mirabilis which has been observed on previous surveys of FU19.en_GB
dc.description.sponsorshipFunder: Marine Instituteen_GB
dc.language.isoenen_GB
dc.publisherMarine Instituteen_GB
dc.relation.ispartofseriesMarine Institute UWTV Survey report;2015
dc.subjectNephrops norvegicusen_GB
dc.subjectstock assessmenten_GB
dc.subjectgeostatisticsen_GB
dc.subjectunderwater television (UWTV)en_GB
dc.subjectbenthosen_GB
dc.subjectCTDen_GB
dc.subjectCV15020en
dc.titleFU19 Nephrops Grounds 2015 UWTV Survey and catch options for 2016en_GB
dc.title.alternativeCV15020en
dc.typeTechnical Reporten_GB
refterms.dateFOA2018-01-12T06:06:39Z


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