Trenngitter - eine Alternative zu den Trichternetzen in der Garnelenfischerei

Wienbeck, Harald (1995) Trenngitter - eine Alternative zu den Trichternetzen in der Garnelenfischerei. Informationen für die Fischwirtschaft aus der Fischereiforschung, 42(1), pp. 36-42.

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Experimental fishing trials were conducted in the Elbe Estuary using an experimental 3 m-standard beamtrawl. To avoid the by-catch of fish, a sorting grid was used. The elliptical grid was constructed of 6 mm diameter stainless steel bars with a spacing of 13 mm between the bars and housed in a cylindrical frame of 400 mm diameter. It was installed in the extension piece just in front of the codend angled at 45°, with a fish outlet at the top. A series of 10 tows of 15 minutes duration at a towing speed of 3 kn was done. The catch of the main codend was compared with the catch separated by the sorting grid. This achieved a reduction of 56 % of plaice (Pleuronectes platessa), 75 % of flounder (Platichthys flesus), 99 % of whiting (Merlangius merlangus), 94 % of cod (Gadus morhua) and 49 % of smelt (Osmerus eperlanus) with a mean loss of 43 % of shrimps (Crangon crangon). English grid trials in the Humber estuary using a flapper set or guiding funnel in front of the sorting grid device demonstrated reasonable lower escapement rates for fish and shrimps.

Item Type: Article
Title: Trenngitter - eine Alternative zu den Trichternetzen in der Garnelenfischerei
Alternative Title: Sorting grids - an alternative to sieve- or veilnets in the brown shrimp fishery.
Personal Creator/Author:
Refereed: No
Journal or Publication Title: Informationen für die Fischwirtschaft aus der Fischereiforschung
Volume: 42
Number: 1
Page Range: pp. 36-42
Date: 1995
ISSN: 1437-5842
Contact Email Address:
Issuing Agency: Bundesforschungsanstalt für Fischerei
Additional Information: Johann Heinrich von Thünen-Institut, 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; mesh selection; species composition; efficiency; escapement rates
Subjects: Fisheries
Item ID: 4233
Depositing User: Horst Bahl
Date Deposited: 28 Oct 2010 12:11
Last Modified: 10 Nov 2012 19:36
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