Analyse der Beifangreduktion durch Trichternetze in der kommerziellen Garnelenfischerei

Wienbeck, Harald (1998) Analyse der Beifangreduktion durch Trichternetze in der kommerziellen Garnelenfischerei. Informationen für die Fischwirtschaft aus der Fischereiforschung, 45(1), pp. 18-22.

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Official URL: http://aquacomm.fcla.edu/3311

Abstract

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.

Item Type: Article
Title: Analyse der Beifangreduktion durch Trichternetze in der kommerziellen Garnelenfischerei
Personal Creator/Author:
CreatorsEmail
Wienbeck, Haraldharald.wienbeck@vti.bund.de
Refereed: No
Journal or Publication Title: Informationen für die Fischwirtschaft aus der Fischereiforschung
Volume: 45
Number: 1
Page Range: pp. 18-22
Date: 1998
ISSN: 1437-5842
Contact Email Address: harald.wienbeck@vti.bund.de
Issuing Agency: Bundesforschungsanstalt für Fischerei
Additional Information: 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.
Uncontrolled Keywords: catch processing; net construction; fishing technique; trawl fishery; by-catch; protected areas; discards; shrimp
Subjects: Fisheries
Engineering
Item ID: 3311
Depositing User: Horst Bahl
Date Deposited: 10 May 2010 14:57
Last Modified: 10 Nov 2012 18:11
Related URLs:
URI: http://aquaticcommons.org/id/eprint/3311

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