This is a data product to support state indicators that are based from
groundfish biological data, derived using primary data from surveys undertaken
in the Northeast Atlantic between 1983 and 2020. Catch records by taxonomic
group and by length category in terms of biomass and numbers of fish
standardised to duration (per hour) or to the area swept by the haul. Data are
available from multiple surveys using data downloaded from the ICES database
of trawl surveys (DATRAS) once quality-controlled and standardised following
procedures detailed in Greenstreet and Moriarty 2017. Data file names reflect
the OSPAR region sampled, country conducting the sampling, fishing gear and
time of years of sampling (as defined by Greenstreet and Moriarty 2017), e.g.:
BBICFraBT4 refers to Bay of Biscay and Iberian Coast data from France by a
Beam Trawl survey in quarter 4 of the year and GNSIntOT3 refers to Greater
North Sea data from International (multiple countries) sampling by an Otter
Trawl survey in quarter 3 of the year etc.
Greenstreet, S.P.R. and Moriarty, M. (2017) OSPAR Interim Assessment 2107 Fish
Indicator Data Manual (Relating to Version 2 of the Groundfish Survey
Monitoring and Assessment Data Product). Scottish Marine and Freshwater
Science Vol 8 No 17, 83pp. DOI: 10.7489/1985-1_
.. _10.7489/1985-1:
https://data.marine.gov.scot/dataset/ospar-interim-assessment-2017-fish-indicator-data-manual-relating-version-2-groundfish