North Sea Historical Effort by Rectangle by Year: 1913 -1980

This dataset includes long-term, spatially detailed information on UK trawl and seine fishing effort in the North Sea, by year and ICES rectangle. The period covered is 1923–1980 excluding the years during and immediately after both World Wars. Effort data (number of hours fishing) are shown separately for each of the major historical demersal trawling and seining fleets of the UK: sailing trawlers (pre-WWII only), steam trawlers (until the 1970s), motor trawlers, steam seiners (pre-WWII only), and motor seiners.