Spatial distribution of demersal and pelagic fishes in the wider Weddell Sea (Antarctica) with links to ArcGIS map packages

• Main Authors: Teschke, Katharina, Pehlke, Hendrik, Brey, Thomas
• Format: Dataset
• Language: English
• Published: PANGAEA 2019
• Subjects: Antarctica; Antarctic silverfish (Pleuragramma antarctica); Antarctic toothfish (Dissostichus mawsoni); AWI_FuncEco; Development of a CCAMLR Marine Protected Area in the Antarctic Weddell Sea; File content; File format; File name; File size; Functional Ecology @ AWI; Marine Protected Area (MPA); Model; nesting sites; Uniform resource locator/link to file; Weddell Sea; Wider_Weddell_Sea_Antarctica_Fish; WSMPA; Antarc*; Antarctic; Antarctic silverfish; Antarctic Toothfish; Berichte zur Polar- und Meeresforschung; Berichte zur Polarforschung; Ice Shelf; Larsen Ice Shelf; Lazarev Sea; Polar Biology; Polar Research; Polarforschung; Reports on Polar and Marine Research; Reports on polar research; Riiser Larsen Ice Shelf; Riiser-Larsen Ice Shelf; Southern Ocean
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.899591; https://doi.org/10.1594/PANGAEA.899591

Here we provide four ArcGIS map packages with georeferenced files on the spatial distribution of demersal and pelagic fishes in the wider Weddell Sea (Antarctica), which were created in the context of the development of a marine protected area (MPA) in the Weddell Sea. Antarctic toothfish: The map of Dissostichus mawsoni occurrence probability is based on catch per unit effort (CPUE) data from the database of the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) (data request: 03-08-2016) and on bathymetric data from the International Bathymetric Chart of the Southern Ocean (IBCSO). We fitted a four-parameter Weibull model to the simulated CPUE data per depth interval by means of the R package 'fitdistrplus'. The highest D. mawsoni occurrence probability was shown at depths between 1500 and 2000 m and only approximately 20 % of the Antarctic toothfish population occurred deeper than 2000 m. Antarctic silverfish: The map of interpolated abundances of Pleuragramma antarctica was based on pelagic trawl survey data, which were collected during "Polarstern" cruises ANT-I/2, ANT-III/3 and in the context of the Lazarev Sea Krill Survey (LAKRIS) ("Polarstern" cruises ANT-XXI/4, ANT-XXIII/6, ANT-XXIV/2). The first mentioned data were provided by V. Siegel (retired; formerly Thünen Institute), the LAKRIS data by H. Flores (AWI). Those data were complemented by benthic trawl survey data, which were collected during seven "Polarstern" cruises between 1996 and 2011 (ANT-XIII/3, ANT-XV/3, ANT-XVII/3, ANT-XIX/5, ANT-XXI/2, ANT-XXIII/8, ANT-XXVII/3) and were provided by R. Knust (AWI) as well as by data on counts of fish species from trawl and dredge samples by Drescher et. (2012), Ekau et al. (2012a, b), Hureau et al. (2012), Kock et al. (2012) and Wöhrmann et al. (2012). An inverse distance weighted interpolation was performed for a 10 nautical mile radius around each record. Areas with highest numbers of P. antarctica (> 36 individuals/1000 m²) occurred offshore Riiser -Larsen Ice Shelf and on ...