The spawning and distribution of mackerel eggs in the North Sea related to the hydrography
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The distribution of mackerel eggs in the North Sea have been studied several years to estimate the spawning stock size. During these surveys the hydrographical regime has been mapped. Spawning intensity and hydrographical data have been collected during the spawning season at fixed localities. Some of these data are analyzed in this paper to investigate relationships between the spawning period, the geographical distribution of mackerel eggs and hydrographical parametres.