• The egg production and spawning stock size of the North Sea mackerel stock in 1984 

      Iversen, Svein A.; Westgård, Trond; Kirkegaard, E.; Eltink, A.; Hopkins, P.; Walsh, Martin (ICES CM Documents;1985/H:38, Working paper, 1985)
      During the period 22 May to 17 July the spawning area of North Sea mackerel was investigated by research vessels from Scotland, the Netherlands, Denmark and Norway. Based on the 629 plankton samples and temperature ...