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Title

New monitoring technologies assisting deep-water and deep-sea crustacean decapods stock assessment

AuthorsAguzzi, Jacopo ; Company, Joan B. ; Navarro, Joan ; Bahamon, Nixon ; Rotllant, Guiomar ; García, José A. ; Río, Joaquín del; Gomáriz, Spartacus; Masmitja, I.; Marini, S.; Fanelli, Emanuela ; Lordan, Colm; Doyle, Jennifer; Chumbinho, Rogerio; Tuck, Ian; Martinelli, Michela; Chiarini, Matteo
Issue Date26-May-2019
PublisherCrustacean Society
CitationThe Crustacean Society Mid-Year Meeting : Abstract book: 167 (2019)
AbstractThe stock assessment of Norway lobster (Nephrops norvegicus) is made by fishery-dependent (i.e. trawl catches) or fishery-independent (i.e. burrow counts) methods. In both cases, important methodological assumptions affect the validity of derived population demographic estimates. Here, we provide a description of cabled underwater sensor networks in relation to the production of ancillary data for stock assessment of deep-sea highly commercially exploited decapods, whose fishery is in decline in the Mediterranean Sea. Specifically, two 20 m depth cabled video-observatories belonging to the European Multidisciplinary Seafloor and water column Observations (EMSO) network (SmartBay, in Ireland and OBSEA in Spain) are being used for in situ high-frequency time-lapse video and oceanographic monitoring of the burrow emergence of individuals. This monitoring will be used to quantify inter-individual variability in frequency and duration of emergence as a product of ecological and environmental forcing, and inform population level estimates of emergence (and hence availability to trawling) and burrow occupancy. Obtained data will serve as cross validation for acoustic tagging trials (i.e. animals bearing frequency-specific emitters, operating in tandem with listening hydrophone stations). Emissions and silences will be proxy of emergence timing and duration. A shallow water trial performed at OBSEA will serve as test-bed for acoustic mooring placement at 350-400 m depth, in the no take zone off Blanes Canyon (Spain)
DescriptionThe Crustacean Society Mid-Year Meeting (TSC 2019), 26-30 May 2019, Hong Kong.-- 1 page
URIhttp://hdl.handle.net/10261/204506
Appears in Collections:(ICM) Comunicaciones congresos
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