• Racial analyses of Dunmore East Herring stocks by means of the Otoliths

      Foster, M. (Fisheries Division, Department of Lands., 1963)
      Einarsson (1951) has shown that it is possible to separate in a mixed fishery the winter/spring spawned fish from summer/autumn spawned fish on the basis of the appearance of the nuclei of the otoliths. In general, the winter/spring spawned fish have small hyaline and opaque nuclei, whereas the summer/autumn spawned fish have large hyaline nuclei. Otoliths from herrings taken at Dunmore East in the period 1960 to 1964 were examined and classified using Einarsson's method.