| Summary: | Working Document presented to the Working Group on Elasmobranch Fishes ICES WGEF, 14th to <23th June 2022- Lisbon - Portugal. This working document presents the results on the most abundant elasmobranch species captured in the 2021 Spanish Groundfish Survey on Northern Spanish shelf. Biomass, spatial distribution and length ranges were analysed for Scyliorhinus canicula (lesser spotted dogfish), Scyliorhinus stellaris (greater spotted dogfish), Galeus melastomus (blackmouth catshark), Galeus atlanticus (atlantic sawtail catshark), Etmopterus spinax (velvet belly), Hexanchus griseus (bluntnose sixgill shark), Raja clavata (thornback ray), Raja montagui (spotted ray), Leucoraja naevus (cuckoo ray) and other scarce elasmobranches. In general the biomass of these species decreased this last survey. As usual a few specimens of the scarce elasmobranches Scymnodon ringens (knifetooth dogfish), Dalatias licha (kitefin shark) and Leucoraja circularis (sandy ray) were found in this last survey, whereas the occasional species Etmopterus pusillus (smooth lanternshark), Dipturus nidarosiensis (norwegian skate), Raja microocellata (small-eyed ray), Raja undulata (undulate ray), Gaelorhinus galeus (tope shark), Tetronarce nobiliana (electric ray), Dipturus oxyrinchus (longnosed skate) and Centroscymnus crepidater (longnose velvet dogfish) were not. Mustelus mustelus (smooth-hound), Torpedo marmorata (marbled electric ray), Neoraja iberica (Iberian pygmy skate) and Raja brachyura (blonde ray) were captured again since time ago in the time series and the species Oxynotus paradoxus (sailfin roughshark) and Raja polystigma (speckled ray) were found for the first time in the historical series. Regarding recruitment, abundance of small specimens increased slightly for S. stellaris and R. montagui. This survey is part of the ERDEM5 project, co-funded by the EU through the European Maritime and Fisheries Fund (EMFF) within the Spanish National Program for the collection, management and use of data from the fisheries sector and ...
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