¦winiarski J., Małolepszy W., 1973. Changes in mesh sizes of cod-end netting of trawls used by the trawlers type B-18 during their exploitation. Acta Ichthyol. Piscat. 3 (1): 139-147.

The present paper describes studies on changes in mesh sizes of the cod-end netting of trawls used by the B-18 type freezing trawlers belonging to the Deep Sea Fisheries Company (PPDiUR) “Odra” in Swinouj¶cie. Measurements of the mesh sizes were taken from 6 cod-ends of bottom and pelagic trawlers, using a Polish Longitudinal-force mesh gauge. It was shown that a significant increase of .mesh sizes in the trawl cod-ends occurred during the trawl exploitation. Meshes of the upper part of trawls subjected to the greater deformations. Detailed results of investigations are given in Table 2 and 3.