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Deep-sea sponge grounds of the Flemish Cap, Flemish Pass and the Grand Banks of Newfoundland (Northwest Atlantic Ocean): Distribution and species composition Murillo, F.J.; Muñoz, P.D.; Cristobo, F.J.; Ríos, P.; González, C.; Kenchington, E.; Serrano, A. (2012). Deep-sea sponge grounds of the Flemish Cap, Flemish Pass and the Grand Banks of Newfoundland (Northwest Atlantic Ocean): Distribution and species composition. Mar. Biol. Res. 8(9): 842-854. http://dx.doi.org/10.1080/17451000.2012.682583 In: Marine Biology Research. Taylor & Francis: Oslo; Basingstoke. ISSN 1745-1000; e-ISSN 1745-1019

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Trefwoorden

Animal products > Sponges ANW, Flemish Cap ANW, Grand Banks Fisheries Geodia barretti Bowerbank, 1858 [WoRMS]; Geodia macandrewii Bowerbank, 1858 [WoRMS]; Geodia phlegraei (Sollas, 1880) [WoRMS]; Stelletta normani Sollas, 1880 [WoRMS]; Stryphnus ponderosus (Bowerbank, 1866) [WoRMS] Atlantic [Marine Regions]; Flemish Cap [Marine Regions]; Grand Banks of Newfoundland [Marine Regions] Marien/Kust

Author keywords

Sponge grounds; NAFO; Vulnerable Marine Ecosystems

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Auteurs		Top
Murillo, F.J. Muñoz, P.D. Cristobo, F.J. Ríos, P.	González, C. Kenchington, E. Serrano, A.

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Abstract

Distribution and species composition of deep-sea sponge grounds of the Flemish Cap, Flemish Pass and the Grand Banks of Newfoundland are described based on Spanish/EU bottom trawl groundfish surveys between 40 and 1500 m depth. Four areas with large catches of sponges and at least 30 different species have been identified in the study area. Geodia barretti, Geodia macandrewii, Geodia phlegraei, Stryphnus ponderosus and Stelletta normani are the main structural sponges and constitute more than 94% of the total invertebrate biomass of these grounds. The temperature and salinity observed over these bottoms ranged between 3.38 and 3.84°C and between 34.85 and 34.90‰, respectively. The biomass of deep-water sponges per swept area was significantly higher on lightly or untrawled bottoms than in the grounds that are regularly fished. Data from trawl groundfish surveys cannot map the deep-sea sponge grounds to a precision less than the trawl distance of 1.5 nm. Nevertheless it has been used by the Northwest Atlantic Fisheries Organization (NAFO), along with additional Canadian data, to implement the 61/105 United Nations General Assembly Resolution in closing six areas to bottom fishing activities to protect the sponge grounds of the NAFO Regulatory Area.

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