The survey is part of the 1st quarter International Bottom Trawl Survey (IBTS) in the North Sea, which is coordinated by the ICES International Bottom Trawl Survey Working Group and has been conducted with standard fishing gear in the 1st quarter since 1983. The IBTS aims to provide ICES assessment and science groups with consistent and standardised data for examining spatial and temporal changes in
(a) the distribution and relative abundance of fish and fish assemblages
(b) of the biological parameters of commercial fish species for stock assessment purposes.
Kai Wieland (Technical University of Denmark, National Institute of Aquatic Resources)
ICES International Bottom Trawl Survey (IBTS)
International Council for the Exploration of the Sea (ICES)