T90-Steert: Letzte Untersuchungen vor der Übernahme ins EU-Regelwerk

Wienbeck, Harald and Dahm, Erdmann (2006) T90-Steert: Letzte Untersuchungen vor der Übernahme ins EU-Regelwerk. Informationen aus der Fischereiforschung = Information on Fishery Research, 53(1), pp. 59-64. DOI: 10.3220/Infn53_59-64_2006

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Official URL: http://aquacomm.fcla.edu/2980/

Abstract

After due consideration the EU Commission has decided in December 2005 to admit cod-ends made of netting turned 90 de-grees (T90) as an allowable alternative for the cod fishery of the Baltic. The construction was included as one of two admissibles versions into the newly issued EU regulation 2187/2005 on technical measures for the conservation of fishery resources of the Baltic. This contribution describes some of the investigations preceeding that decision with which some of the previous demurs could be dispelled. In the course of these experiments it was detected that the cod-end netting material plays an important role for the mesh selection of a T90 cod-end, whereas the netting twine diameter is negligible. Problems with modern twine mate-rial have to be taken in consideration for constructional changes of T90 cod-ends. A relation of 1 to 2 in the circumferences in meshes at the joining round between last row of the belly and extension/cod-end turned out to be acceptable. Both the hauling technique (sidetrawler or sterntrawler) and an extensive use in the commercial fishery proved to be of no relevance for to the selection of T90 cod-ends. Taken alone, the different hydrodynamic conditions in a cod-end are insufficient to fully explain the selection phenomena. This was demonstrates by the material-related differences in selectivity of T90 cod-ends.

Item Type: Article
Title: T90-Steert: Letzte Untersuchungen vor der Übernahme ins EU-Regelwerk
Personal Creator/Author:
CreatorsEmail
Wienbeck, Haraldharald.wienbeck@vti.bund.de
Dahm, Erdmann
Refereed: No
Journal or Publication Title: Informationen aus der Fischereiforschung = Information on Fishery Research
Volume: 53
Number: 1
Page Range: pp. 59-64
Date: 2006
ISSN: 1861-2164
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 Fishery Research in 2010. Johann Heinrich von Thünen-Institut, Institut für Ostseefischerei
Uncontrolled Keywords: fishing tecnology;
Subjects: Law
Fisheries
Engineering
Item ID: 2980
Depositing User: Horst Bahl
Date Deposited: 10 Mar 2010 12:39
Last Modified: 29 Sep 2011 18:07
Related URLs:
URI: http://aquaticcommons.org/id/eprint/2980

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