Deep-sea sponge grounds of the Flemish Cap, Flemish Pass and the Grand Banks of Newfoundland (Northwest Atlantic Ocean): Distribution and species composition

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 speci...

Full description

Bibliographic Details
Published in:Marine Biology Research
Main Authors: Murillo, F.J. (Francisco Javier), Durán-Muñoz, P. (Pablo), Cristobo, J. (Javier), Ríos, P. (Pilar), González-Iglesias, M.C. (María de la Concepción), Kenchington, E. (Ellen), Serrano, A. (Alberto)
Format: Article in Journal/Newspaper
Language:English
Published: Centro Oceanográfico de Vigo 2012
Subjects:
Sponge grounds
fisheries
NAFO
Northwest Atlantic Ocean
Vulnerable Marine Ecosystems
Newfoundland
North Atlantic
Northwest Atlantic
Online Access:http://hdl.handle.net/10508/927
https://doi.org/10.1080/17451000.2012.682583
Description
Summary: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.

Similar Items