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Dataset of the multidisciplinary research surveys in the seamounts of Ewing and Valdivia Bank (Walvis Ridge) - SE Atlantic
Citeerbaar als data publicatie
López-Abellán, L. J.; Sarralde Vizuete, R.; González Jiménez, J. F.; Centro Oceanográfico de Canarias – IEO, Spain (2015). Dataset of the multidisciplinary research surveys in the seamounts of Ewing and Valdivia Bank (Walvis Ridge) - SE Atlantic. https://doi.org/10.14284/58

Toegang tot data
Gearchiveerde data

Beschrijving
The dataset is the result of the sampling conducted between 2008 and 2010 on the R/V Vizconde de Eza. meer

The three multidisciplinary research surveys on board the R/V Vizconde de Eza (Secretaría General de Pesca Marítima) were performed in the seamounts of Ewing and Valdivia Bank (Walvis Ridge) as a collaborative work between Spain and Namibia trough the Instituto Español de Oceanografía (IEO) and the National Marine Information and Research Centre of Swakopmund (NatMIRC). Studies on biodiversity, acoustic and geophysics, hydrography, and seabird and cetacean observations were conducted. A total of 15 823 km² were surveyed with a multibeam echosounder and 1462 km of seismic profiles, using an ultra-high resolution parametric sounder. The depth ranged between 218 m at the outcrop in the South-eastern sector of Valdivia Bank and 3000 m in the southern part of our study. A total of 210 species of fish, 60 crustaceans and 32 cephalopods were recorded. Species diversity increased by depth and four assemblages by depth strata were found: shallower (200-300 m); slope (300 - 800 m); upper deep (800 - 1300 m); and deep (1300 - 2000 m).

Scope
Thema's:
Biologie, Biologie > Benthos, Biologie > Ecologie - biodiversiteit, Biologie > Vis
Kernwoorden:
Marien, Seamounts, PSW, Walvis Ridge, Arthropoda, Chordata, Cnidaria, Echinodermata, Mollusca, Porifera

Geografische spreiding
PSW, Walvis Ridge Stations [Marine Regions]
Valdivia Bank
Coördinaten: MinLong: 4,871; MinLat: -24,39 - MaxLong: 6,729; MaxLat: -26,82 [WGS84]
Ewing Seamount
Coördinaten: MinLong: 7,92; MinLat: -23,01 - MaxLong: 8,54; MaxLat: -23,39 [WGS84]

Spreiding in de tijd
2 Februari 2008 - 26 Februari 2010
Jaarlijks

Taxonomische spreiding
Arthropoda [WoRMS]
Chordata [WoRMS]
Cnidaria [WoRMS]
Echinodermata [WoRMS]
Mollusca [WoRMS]
Porifera [WoRMS]

Parameters
Biomassa bodemdieren Methode , Biomassa van bathypelagische fauna Methode , Densiteit Bodemdieren Methode , Densiteit van bathypelagische fauna Methode
Biomassa bodemdieren: Beam trawling
A beam trawl net was towed for 25-minutes at a towing speed of 2 knots. The beam trawl has following characteristics: 4m beam trawl (measured between inside edges of shoes); vertical opening 0.6 m; cod-end mesh size of 25 mm.

Biomassa bodemdieren: Rock dredging
A Rock dredge was towed for 15-minutes trawl at a towing speed of 2 knots. The rock dredge has following characteristics: 80 x 30 cm opening; cod-end mesh size of 20 mm.

Biomassa bodemdieren: Lofoten bottom trawling
Sampling was done by towing a Lofoten bottom trawl for 30-minutes at a speed of 3 knots. The Lofoten bottom trawl has following characteristics: Headrope/Footrope = 31.20 m/17.70 m; Rockhopper with 27 rollers of 35 cm; Cod-end mesh size of 35 mm; Horizontal opening 19.93 (between bridles) ; vertical opening 3 m.
Biomassa van bathypelagische fauna: Lofoten bottom trawling
Sampling was done by towing a Lofoten bottom trawl for 30-minutes at a speed of 3 knots. The Lofoten bottom trawl has following characteristics: Headrope/Footrope = 31.20 m/17.70 m; Rockhopper with 27 rollers of 35 cm; Cod-end mesh size of 35 mm; Horizontal opening 19.93 (between bridles) ; vertical opening 3 m.
Densiteit Bodemdieren: Lofoten bottom trawling
Sampling was done by towing a Lofoten bottom trawl for 30-minutes at a speed of 3 knots. The Lofoten bottom trawl has following characteristics: Headrope/Footrope = 31.20 m/17.70 m; Rockhopper with 27 rollers of 35 cm; Cod-end mesh size of 35 mm; Horizontal opening 19.93 (between bridles) ; vertical opening 3 m.

Densiteit Bodemdieren: Beam trawling
A beam trawl net was towed for 25-minutes at a towing speed of 2 knots. The beam trawl has following characteristics: 4m beam trawl (measured between inside edges of shoes); vertical opening 0.6 m; cod-end mesh size of 25 mm.

Densiteit Bodemdieren: Rock dredging
A Rock dredge was towed for 15-minutes trawl at a towing speed of 2 knots. The rock dredge has following characteristics: 80 x 30 cm opening; cod-end mesh size of 20 mm.
Densiteit van bathypelagische fauna: Lofoten bottom trawling
Sampling was done by towing a Lofoten bottom trawl for 30-minutes at a speed of 3 knots. The Lofoten bottom trawl has following characteristics: Headrope/Footrope = 31.20 m/17.70 m; Rockhopper with 27 rollers of 35 cm; Cod-end mesh size of 35 mm; Horizontal opening 19.93 (between bridles) ; vertical opening 3 m.

Bijdrage door
Spanish Ministry of Economy and Competiveness; Instituto Español de Oceanografía (IEO), meerdata eigenaar
Spanish Ministry of Economy and Competiveness; Instituto Español de Oceanografía; Centro Oceanográfico de Canarias, meerdata creatortaxonomisch verantwoordelijkeanalyse van de monsters

Gerelateerde datasets
Gepubliceerd in:
EurOBIS: European Ocean Biogeographic Information System, meer

Publicatie
Gebaseerd op deze dataset
(2011). Preliminary report of the multidisciplinary research cruise on the Walvis Ridge seamounts (Atlantic Southeast-SEAFO). Instituto Español de Oceanografía/National Marine Information and Research Centre: Madrid, Swakopmund. 191 pp., meer
Navarro, S.J. et al. (2011). Seamount associated species (fishes, crustaceans and cephalopods) Namibia-0802, in: (2011). Preliminary report of the multidisciplinary research cruise on the Walvis Ridge seamounts (Atlantic Southeast-SEAFO). pp. 98-191, meer

Dataset status: Afgelopen
Data type: Data
Data oorsprong: Onderzoek
Metadatarecord aangemaakt: 2013-02-04
Informatie laatst gewijzigd: 2015-12-11
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