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Data provided by the Marine Institute, and may also incorporate data from other agencies and bodies.
This dataset shows the distribution
of fishing effort by fishing vessels according to the gear type used. Fishing
effort is defined as the time spent engaged in fishing operations or time spent
at sea, this time may be multiplied by a measure of fishing capacity, e.g.
engine power. In this dataset fishing effort is measured as average hours spent
actively fishing per kilometre square, per year. Data from years 2014 to 2018
was used to produce this data product for the Marine Institute publication the
“Atlas of Commercial Fisheries around Ireland, third edition“ (https://oar.marine.ie/handle/10793/1432).
Effort for offshore fisheries is based on the
following 2 primary data types - data on vessel positioning and data on gear
types used:
Vessel Monitoring Systems (VMS) supplied by the
Irish Naval Service provide geographical position and speed of vessel at
intervals of two hours or less (Commission Regulation (EC) No. 2244/2003). 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.
Logbooks collected by the Sea-Fisheries Protection
Authority and supplied by the Department of Agriculture, Food & the Marine
were the primary data source for information on landings and gear types used by
Irish vessels. EU Fleet Register obtained from the EU fleet register provides
information for non-Irish vessels and for Irish vessels for which the gear was
not known from the logbooks. 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. The fishing gear data was classified into eight main groups: demersal
otter trawls; beam trawls; demersal seines; gill and trammel nets; longlines;
dredges; pots and pelagic trawls.
The VMS data was analysed using the approach
described by Gerritsen and Lordan (IJMS 68(1)). This approach assigns effort 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, vessels were assumed to be actively
fishing if their speed fell within a certain range (depending on the fishing
gear used). The points that remain are then aggregated into a spatial grid to
produce a raster dataset showing fishing effort (in hours) per kilometre square
per year for each gear type group. The data is available for all countries
combined and for Irish vessels only.
Data provided by the Marine Institute, and may also incorporate data from other agencies and bodies.
This dataset shows the distribution
of fishing effort by fishing vessels according to the gear type used. Fishing
effort is defined as the time spent engaged in fishing operations or time spent
at sea, this time may be multiplied by a measure of fishing capacity, e.g.
engine power. In this dataset fishing effort is measured as average hours spent
actively fishing per kilometre square, per year. Data from years 2014 to 2018
was used to produce this data product for the Marine Institute publication the
“Atlas of Commercial Fisheries around Ireland, third edition“ (https://oar.marine.ie/handle/10793/1432).
Effort for offshore fisheries is based on the
following 2 primary data types - data on vessel positioning and data on gear
types used:
Vessel Monitoring Systems (VMS) supplied by the
Irish Naval Service provide geographical position and speed of vessel at
intervals of two hours or less (Commission Regulation (EC) No. 2244/2003). 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.
Logbooks collected by the Sea-Fisheries Protection
Authority and supplied by the Department of Agriculture, Food & the Marine
were the primary data source for information on landings and gear types used by
Irish vessels. EU Fleet Register obtained from the EU fleet register provides
information for non-Irish vessels and for Irish vessels for which the gear was
not known from the logbooks. 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. The fishing gear data was classified into eight main groups: demersal
otter trawls; beam trawls; demersal seines; gill and trammel nets; longlines;
dredges; pots and pelagic trawls.
The VMS data was analysed using the approach
described by Gerritsen and Lordan (IJMS 68(1)). This approach assigns effort 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, vessels were assumed to be actively
fishing if their speed fell within a certain range (depending on the fishing
gear used). The points that remain are then aggregated into a spatial grid to
produce a raster dataset showing fishing effort (in hours) per kilometre square
per year for each gear type group. The data is available for all countries
combined and for Irish vessels only.