Bethke, Eckhard and Wienbeck, Harald (1996) Analyse des Fluchtverhaltens von Fischen auf Schiffsgeräusche mit hydroakustischen Methoden. Informationen für die Fischwirtschaft aus der Fischereiforschung, 43(3), pp. 139-143.
Investigations on the avoidance reactions of pelagic schooling fish (herring and sprat) released by an approaching fishery vessel were carried out during the 378th cruise of FRC "Solea" from 25 September to 3 October 1995 in the Arkona Sea, southern Baltic. An echosounder system EK 500/BI500 with a 38 kHz transducer mounted on a towed body as weIl as a 120 kHz hull mounted transducer were used. Fish densities were measured synchronously as well as under the ship as at a laterally distances from the ship by the transducer of the towed body. By these means the variation of fish densities up to a certain distance from the ship is possible. The advantage of using an echo integrating system for these measurements is, that it works also for not schooling fish and under conditions where schooling fish disperse (e.g. at night).
|Item Type: ||Article|
|Title: ||Analyse des Fluchtverhaltens von Fischen auf Schiffsgeräusche mit hydroakustischen Methoden|
|Personal Creator/Author: |
|Journal or Publication Title: ||Informationen für die Fischwirtschaft aus der Fischereiforschung|
|Page Range: ||pp. 139-143|
|Contact Email Address: ||email@example.com|
|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: ||fishery technology; hydroacoustic method; sonar measurements;|
|Item ID: ||4205|
|Depositing User: ||Horst Bahl|
|Date Deposited: ||28 Oct 2010 14:16|
|Last Modified: ||10 Nov 2012 19:33|
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