Netzmaterial und Selektivität in der Ostseedorschfischerei

Dahm, Erdmann (2003) Netzmaterial und Selektivität in der Ostseedorschfischerei. Informationen für die Fischwirtschaft aus der Fischereiforschung, 50(1), pp. 32-35.

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Since some time fishing gear scientists express their concern over an observed tendency of the commercial fishery to proceed from codend netting yarns of 3 to 4 mm to higher values or to switch to the use of double instead of single yarn. A recent large EU-financed project collected statistical evidence on the detrimental effect of such behaviour on the selectivity of the codends. In this context data on cod are very scarce. German-Polish experiments in the Baltic from 1999 to 2001 aimed at filling this gap. The investigations prove a clear evidence of a negativ ecorrelation between netting yarn diameter and selectivity factor and/or L50. In addition they demonstrate a clear negative effect on selectivity when switching from single to double yarn The effects are of an order of magnitude that counteracting effects as catch size are masked and support the decision of the IBSFC to define maximum yarn diameters both for single and double yarn netting. A measuring instrument for the enforcement of these new regulations was introduced right in time.

Item Type: Article
Title: Netzmaterial und Selektivität in der Ostseedorschfischerei
Alternative Title: Netting material and selectivity in the Baltic cod fishery
Personal Creator/Author:
Dahm, Erdmann
Refereed: No
Journal or Publication Title: Informationen für die Fischwirtschaft aus der Fischereiforschung
Volume: 50
Number: 1
Page Range: pp. 32-35
Date: 2003
ISSN: 1437-5842
Contact Email Address:
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: fishing technique; Baltic Sea; Cod; gadus morhua; selectivity factor; selectivity range
Subjects: Fisheries
Item ID: 3092
Depositing User: Horst Bahl
Date Deposited: 14 Apr 2010 13:50
Last Modified: 10 Nov 2012 13:42
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