Bearbeitung von Fangproben mit neuen elektronischen Messmethoden

Wienbeck, Harald (2000) Bearbeitung von Fangproben mit neuen elektronischen Messmethoden. Informationen für die Fischwirtschaft aus der Fischereiforschung, 47(2), pp. 91-94.

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Official URL: http://aquacomm.fcla.edu/3253

Abstract

For 10 years the Institute for Fishing Technology, Hamburg (IFH) has been carrying out experiments in the brown shrimp fishery with beam trawls aiming at a reduction of unwanted bycatches. When the tests were transferred to commercial fishery conditions the personnel effort and costs increased markedly. It became e.g. necessary to install a deep-freeze chain to make it possible to evaluate more samples in the laboratory. This again required to increase the number of technicians for measuring the fish and shrimp samples, but also made it necessary to perform this work in the most rational and time-saving way by applying modern electronic aids. Though all samples still have to be sorted by species and have to be weighed and measured the introduction of electronic aids, however, like electronic measuring board and computer-aided image processing system, all weight and length data are immediately and digitally recorded after processing. They are transferred via a network to a server PC which stores them into a purpose-designed database. This article describes the applicationof two electronic systems: the measuring board (FM 100, Fa. SCANTROL), iniated by a project in the Norwegian Institute for Fishing Technology, and a computer-aided image processing system, focussing on measuring shrimps in their naturally flexed shape, also developed in the Institute for Fishing Technology in close collaboration with the University of Duisburg. These electronic recording systems allow the consistent and reproducible record of data independent of the changing day-to-day personal form of the staff operating them. With the help of these systems the number of measurements the laboratory could be maximized to 250 000 per year. This made it possible to evaluate, in 1999, 525 catch samples from 75 commercial hauls taken during 15 days at sea. The time gain in measuring the samples is about one third of the time previously needed (i.e. one hour per sample). An additional advantage is the immediate availability of the digitally stored data which enables rapid analyses of all finished subexperiments. Both systems are applied today in several institutes of the Federal Research Centre. The image processing system is now the standard measuring method in an international research project.

Item Type: Article
Title: Bearbeitung von Fangproben mit neuen elektronischen Messmethoden
Personal Creator/Author:
CreatorsEmail
Wienbeck, Haraldharald.wienbeck@vti.bund.de
Refereed: No
Journal or Publication Title: Informationen für die Fischwirtschaft aus der Fischereiforschung
Volume: 47
Number: 2
Page Range: pp. 91-94
Date: 2000
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: electronical measurement; image analysing; brown shrimp
Subjects: Fisheries
Item ID: 3253
Depositing User: Horst Bahl
Date Deposited: 07 May 2010 17:09
Last Modified: 10 Nov 2012 17:29
Related URLs:
URI: http://aquaticcommons.org/id/eprint/3253

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