Report of Activities of DFC

Recording of densities and growth rates of the 1987 and 1988 year classes of sole, plaice, dab, flounder, cod and whiting was carried out. Two cruises were therefore undertaken according to the criteria of the International Demersal Young Fish survey. The groundfish survey was continued in order to estimate the stock size of adult flatfish in the southern North Sea by means of a beamtrawl fishery in August. This was part of an international survey in collaboration with the Dutch Institute.