Analyse der Beifangreduktion durch Trichternetze in der kommerziellen Garnelenfischerei.
Informationen für die Fischwirtschaft aus der Fischereiforschung, 45(1),
Trials for the determination of the magnitude of bycatch reduction by the sievenets used in the commercial brown shrimp fishery were carried out from September to December 1997. Trawls with 9 m beam length were the subjected to the investigation. They were used on different fishing grounds in the estuary of the Elbe near Cuxhaven. Sievenets with
50, 60 and 80 mm mesh opening were tested in 29 hauls and 31.6 h total duration. A trawl of equal construction without sievenets fished synchronously was used for comparison. The proportional catch composition in the codend was determined by weighing the catch components (fish, discard shrimps and commercial size shrimps) as separated by means of a riddle. The composition of the sorted out part of the catch could be calculated by
comparison of the corresponding catch components both in standard trawl and sievenettrawl. According to this the total catch of a beam trawl with sievenet is diminished by 9 to 34 % depending on the mesh opening of the sievenet. 32 to 58 % of the sorted out part of the catch consists of fish. Use of a sievenet, however, also leads to a loss of 6 to 15 % of commercial size shrimps. Per hour of towing this
means a loss of 8.7 kg commercial size shrimps with a sievenet of 60 mm mesh opening and of 1.8 kg for a mesh size of 80 mm.
||Analyse der Beifangreduktion durch Trichternetze 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.
||catch processing; net construction; fishing technique; trawl fishery; by-catch; protected areas; discards; shrimp
||10 May 2010 14:57
||10 Nov 2012 18:11
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