Changes in mesh sizes of cod-end netting of trawls used by the trawlers type B-18 during their exploitation

Świniarski,J.; Małolepszy,W.

Changes in mesh sizes of cod-end netting of trawls used by the trawlers type B-18 during their exploitation

Авторы

Świniarski,J.

Małolepszy,W.

Издатель

Pensoft Publishers

Описание

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 Świnoujście. 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.