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Please use this identifier to cite or link to this item: http://hdl.handle.net/10793/911

Title: FU19 Nephrops Grounds 2013 UWTV Survey and catch options for 2014
Authors: Lordan, C.
Doyle, J.
Hehir, I.
O’Sullivan, D.
Allsop, C.
O’Connor, S.
Blaszkowski, M.
Butler, R.
Burke, C.
Stewart, P.
Keywords: Nephrops norvegicus
stock assessment
geostatistics
underwater television (UWTV)
benthos
Issue Date: 2013
Publisher: Marine Institute
Citation: Lordan, C., Doyle, J., Hehir, I.,O’Sullivan, D., Allsop, C., O’Connor, S., Blaszkowski, M., Butler, R., Burke, C., and Stewart, P. 2013. FU19 Nephrops Grounds 2013 UWTV Survey and catch options for 2014. Marine Institute.
Abstract: This report provides the main results and findings of the fourth underwater television survey of the various Nephrops grounds in Functional Unit 19. The survey was multi-disciplinary in nature collecting UWTV, CTD, multi-beam and other ecosystem data. In 2013 a total 40 UWTV stations were successfully completed. Adjusted burrow density estimates varied considerably across the different grounds. The 2013 raised abundance estimate of 397 million burrows is a 20% decrease from the 2012 estimate. Taking into account the uncertainty (CV of 17%) this is not significantly different from abundance estimates in 2011 or 2012. Using the 2013 abundance and recent mean weight and discard implies 2014 total catch advice fishing at Fmsy (=F35%spr) of 618 tonnes which results in landings of no more than 521 tonnes.
Description: Use the URI link below to search the Marine Institute Data Discovery Catalogue for datasets relevant to this report.
URI: http://hdl.handle.net/10793/911
http://catalog.marine.ie/geonetwork/srv/en/main.home
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