Makrellundersøkelser vest for De britiske øyer i mai 1972
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- Fisken og havet (1958- ) 
In the period from 3 to 25 May mackerel taggings were carried out southwest and northwest of Ireland and at the Otterbank with the R. V. «Havdrøn». In total 5 086 mackerel were tagged. More than 75 % of the total number were released southwest of Ireland.