świniarski J., Gu╝niczak K., Elminowicz A., 1974. Assessment of the fish shoal abundance from the net sounder and vertical sounder records. Acta Ichthyol. Piscat. 4 (1): 53-69.

The geometric parameters of fish shoals were determined according to the echogrammes of sounded fish shoals. For analyses used the material collected between 17.12.1972 and 25.02.1973 by m/t “Kantar” at Georges Bank fishing grounds. The analysed echogrammes relate to fishing of mackerel.