Erster Einsatz von Trenngittern in der kommerziellen Garnelenfischerei.
Informationen für die Fischwirtschaft aus der Fischereiforschung, 44(1),
Comparative fishing trials were conducted in the river Elbe estuary using 9 m commercial brown shrimp beam trawls. To avoid the bycatch of fish a metal sorting grid of the Nordmöre type was used. The elliptical grid was constructed of 6 mm stainless steel bar with a spacing of 20 mm between the bars and housed in a cylindrical frame of 800 mm diameter. It was installed in the extension piece just in front of the codend. The inclination of the grid was 45 degrees. A fish outlet was provided in the upper panel of the trawl at the upper edge of the grid. A series of 8 tows of 15 min duration at a towing speed of 3 kns was done. For evaluation the catch of the main codend was compared to the portion of the catch escaped through the grid. The presence of the grid caused a 97.4 % reduction of the catch of lump
sucker, a 90.6 % reduction of the catch of sea scorpion, a 79.3 % reduction of the catch of cod, a 58.8 % reduction of the catch of armed bullhead, a 39.6 % reduction of the catch of dab, a 34.7 % reduction of the catch of flounder, a 32.3 % reduction of the catch of smelt, a 19.8 % reduction of the catch of plaice and a 14.5 % reduction of the catch of brown shrimp.
||Erster Einsatz von Trenngittern in der kommerziellen Garnelenfischerei
|Journal or Publication Title:
||Informationen für die Fischwirtschaft aus der Fischereiforschung
|Contact Email Address:
||Bundesforschungsanstalt für Fischerei
||Johann Heinrich von Thünen-Institute, Federal Research Institute for Rural Areas, Forestry and Fisheries began publishing the Informationen aus der Fischereiforschung = Information on Fishery research in 2010.
||by catch;conservation;sustainable fisheries;sorting grid;net construction;
||12 Aug 2010 13:55
||10 Nov 2012 18:33
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