This dataset includes long-term, spatially detailed information on UK trawl
and seine fishing effort in the North Sea, by month and ICES rectangle. The
period covered is 1927,1937, 1947, 1957, 1967 and 1977. 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.
