Offshore Fishery Effort by Gear Type

Published by: Marine Institute
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Effort for offshore fisheries is based on three data sources:

  1. Vessel Monitoring Systems (VMS): VMS transmit the geographical position and speed of fishing vessels at intervals of two hours or less (Commission Regulation (EC) No. 2244/2003) VMS data for the most recent five years (2014-2018) were used. VMS data were supplied to the Marine Institute by the Irish Naval Service. The data are available for all EU vessels of 12m and larger, operating inside the Irish EEZ; outside this zone only Irish VMS data are routinely available. VMS do not record whether a vessel is fishing, steaming or inactive. Vessels were assumed to be fishing if their speed fell within a certain range (depending on the fishing gear used).

  2. Logbooks: Logbook data are collected by the Sea-Fisheries Protection Authority and supplied to the Marine Institute by the Department of Agriculture, Food & the Marine. Logbook data are generally not available for non-Irish vessels. VMS data of Irish vessels were linked to logbook data to obtain the fishing gear used and the landings for each day the vessel was fishing.

  3. EU Fleet Register: For non-Irish vessels, gear information was obtained from the EU fleet register (http://ec.europa.eu/fisheries/fleet/index.cfm). For vessels for which the gear was not known from the logbooks, the main gear type listed in the EU fleet register was used. Note that if vessels use more than one gear, it is possible that the gear type assigned to them was not the one that was actually used.

VMS data were analysed using the approach described by Gerritsen and Lordan (IJMS 68(1), 2011). This approach assigns effort and landings values to each of the VMS data points. The effort of a VMS data point is defined as the time interval since the previous data point. Next the data are filtered for fishing activity using speed criteria. Landings of each vessel were then assigned to VMS fishing positions on a daily basis. The last step is aggregating the landings or effort data to a spatial grid. The data were standardised by dividing by the surface area of the grid cell. This way the data can be expressed as fishing hours per km2 or as landings per km2.

VMS data were supplied to the Marine Institute by the Irish Naval Service. Logbook data are collected by the Sea-Fisheries Protection Authority and supplied to the Marine Institute by the Department of Agriculture, Food & the Marine. The EU fleet register is publicly available (http://ec.europa.eu/fisheries/fleet/index.cfm).

Data Resources (3)

OGC:WMS
available as ogc:wms
HTML
available as HTML
Marine Institute home page
Theme Environment
Date dataset released 2019-11-19
Date dataset updated 2020-01-17
Dataset conforms to these standards See the referenced specification
Rights notes ['Consult license for use limitations', 'otherRestrictions', 'otherRestrictions']
Update frequency Other
Language English
Geographic coverage in GeoJSON format {"type":"Polygon","coordinates":[[[-25.000816176, 46.83333347],[-25.000816176, 57.366661531], [-5.27233311, 57.366661531], [-5.27233311, 46.83333347], [-25.000816176, 46.83333347]]]}
Spatial Reference Systems (SRS) WGS 84 (EPSG:3857)
Provenance information Data supplied by Marine Institute.
Period of time covered (begin) 2014-01-01
Period of time covered (end) 2018-12-31