Fishing effort distribution of small beam trawlers in 2011
Reference System Information
Identification Information
Distribution Information
Data Quality Information

Metadata: 
  File identifier: 
      65EAFC76-D747-4D1C-8B6E-2B1114ADE28D
  Language: 
    Language Code: 
      eng
  Hierarchy level: 
    Scope code: 
      service
  Metadata author: 
    Responsible party: 
      Organisation name: 
          Thünen Institut
      Contact info: 
        Contact: 
          Address: 
            Address: 
              Electronic mail address: 
                  rabea.diekmann@ti.bund.de
      Role: 
        Role code: 
          pointOfContact
  Date stamp: 
      2014-10-29
  Metadata standard name: 
      INSPIRE Metadata Implementing Rules: Technical Guidelines based on EN ISO 19115 and EN ISO 19119
  Metadata standard version: 
      V. 1.2
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Reference system info: Reference system: Reference system identifier: RS Identifier: Code: 4326 Code Space: EPSG
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Identification info: Service Identification (19119): Citation: Citation: Title: Fishing effort distribution of small beam trawlers in 2011 Date: Date: Date: 2014-11-11 Date type: Date type code: creation Identifier: Identifier: Code: 65EAFC76-D747-4D1C-8B6E-2B1114ADE28D-D Abstract: International fishing effort distribution in 2011 was calculated for small beam trawlers (<221kW, <24m) in the German EEZ of the North Sea. It was quantified as swept area ratio, which is the ratio between the trawled area over one year and the size of the respective grid cell. Thus, a swept area ratio of 1 means that an area equivalent to the size of the grid cell was fished over one year. The swept area was calculated from data from Vessel monitoring by satellite (VMS) using the approximate width of the first gear of the ship, taken from the European Fleet register. Cell sizes were assigned using the nested grid approach following Gerritsen et al. 2013 (ICES J. Mar. Sci. 70: 523-531), with approximately 3552km² (corresponding to a resolution of 1°x0.5° at 55°N) as the coarsest and approximately 3.5km² as the finest resolution of grid cells, whereas the resolution depends on the amount of information (GPS data from fishing vessels) within a spatial grid. Point of contact: Responsible party: Organisation name: Thünen Institut Contact info: Contact: Address: Address: Electronic mail address: rabea.diekmann@ti.bund.de Role: Role code: pointOfContact Graphic overview: BrowseGraphic: File name: https://coastmap.hzg.de/server/rest/directories/thumbs/Nestedgrid_smallTBB_2011_Clip.jpg File description: Fishing effort distribution of small beam trawlers in 2011 File type: JPG Descriptive keywords: Keywords: Keyword: infoMapAccessService Thesaurus name: Citation: Title: ISO 19119 service taxonomy Date: Date: Date: 2003 Date type: Date type code: publication Descriptive keywords: Keywords: Keyword: NOAH Type: Keyword type code: theme Descriptive keywords: Keywords: Keyword: Fishing effort distribution Type: Keyword type code: theme Descriptive keywords: Keywords: Keyword: pressureKey5 Type: Keyword type code: theme Descriptive keywords: Keywords: Keyword: TI Type: Keyword type code: theme Descriptive keywords: Keywords: Keyword: Live Data and Maps Thesaurus name: Citation: Title: Thematic Date: Date: Date: 2014-10-29 Date type: Date type code: publication Resource constraints: Constraints: Use limitation: The swept area ratio can only be an approximate value to quantify the impact on the seafloor. First of all, calculations were based on the assumption that all vessels use exclusively their primary gear listed in the Fleet register. Further, gear types are usually further broken down into fishing métiers, specifying gear parameters and target species. Here, we could only distinguish between small and large beam trawlers. Small beam trawler represent to a large degree the coastal shrimp fishery. Effort in offshore areas is probably associated to plaice fishery. Large beam trawlers represent the flatfish fishery, mainly but not exclusively the fishery targeting sole.Because gear designs differ not only in their size, which is considered as gear width, but also in their bottom contact (e.g. by tickler chains), the physical trawling impact is not equivalent to the swept area ratio. Further, the swept area is not equivalent to the proportion of the cell that was impacted by the gear (unless fishing tracks do not overlap at all). The nested grid approach gives swept area ratios for each grid cell, which are however not equivalent in size. Locally the swept area ratio may be even larger when grid cells would be further broken down. However, this can be only done to a resolution of approximately 3.5km² because position data are usually only exact to 0.01°. Further, the VMS system sends position data approximately every 2 hours, and the track of the ship in between cannot be estimated with a high precision. Resource constraints: Legal constraints: Access constraints: Restriction code: otherRestrictions Other constraints: (e) intellectual property rights; Service Type: view Extent: Extent: Geographic element: Geographic bounding box: West bound longitude: 3.5 East bound longitude: 9.980012 South bound latitude: 53.077597 North bound latitude: 56 Coupling Type: Coupling Type: tight Contains Operations: Operation: Operation Name: HTTPGet Distributed Computing Platforms: Distributed Computing Platforms List: WebServices Connect Point: Online Resource: Linkage: URL: https://coastmap.hzg.de/server/services/NOAH_geoDB/TI_nestedgrid_smallTBB_2011/MapServer/WMSServer?
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Distribution info: Distribution: Distribution format: Format: Name: ArcGIS Service Version: 10.2.1 Transfer options: Digital transfer options: Online: Online Resource: Linkage: URL: https://coastmap.hzg.de/server/rest/services/NOAH_geoDB/TI_nestedgrid_smallTBB_2011/MapServer Function: Online function code: information Online: Online Resource: Linkage: URL: https://coastmap.hzg.de/server/services/NOAH_geoDB/TI_nestedgrid_smallTBB_2011/MapServer/WMSServer? Function: Online function code: information
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Data quality info: Data quality: Scope: Scope: Hierarchy level: Scope code: service Report: Domain consistency: Result: Conformance result: Specification: Citation: Title: INSPIRE Directive 2007/2/EC Date: Date: Date: 2015-02-11 Date type: Date type code: publication Explanation: NOAH Project Pass: true Lineage: Lineage: Statement: Trawlers data and data from Vessel monitoring by satellite (VMS)
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