Zum tierschutzgerechten Betäuben und Töten von Aal

Kuhlmann, Holmer and Münkner, Werner and Oehlenschläger, Jörg (2001) Zum tierschutzgerechten Betäuben und Töten von Aal. Informationen für die Fischwirtschaft aus der Fischereiforschung, 48(2), pp. 82-89.

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Official URL: http://aquacomm.fcla.edu/3159

Abstract

Slaughtering of eels should be done not only under animal welfare aspects but as well under consumer protection and economical aspects with respect to technical feasibility. Methods must be practicable for enterprises slaughtering quantities of several kilograms up to several tons per day. Most methods applied up to now in whole Europe were (are) not in accordance with animal welfare mainly due to lacking prescriptions and alternative methods. The great number of experiments carried out within the frame of this project demonstrates the difficulties to combine optimal welfare demands with economical and technical fesibility aspects in one method. Measurements of EEG (electroencephalogram) and ECG (electrocardiogram) have shown that the method laid down in the german legislation does not perfectly stun all eels. This method was improved by applying a „prestun“ with 220 V for 1sec., followed by a 5 min phase at 45 V to prolongue the time of unconsciousness after the stun. Inflating nitrogen gas into the stunning bath additionally causes asphyxia during the stun. By this method 93% of the eels were stunned or even killed. Applying 220 V for bigger batches of eels (~400 kg) will cause big problems with the energy supply. Therefore this method is restricted to batches of 20 - 50 kg. The method laid down in the german legislation probably can be improved. Eels were stunned successfully without water, avoiding the problems of regional differences in the conductivity of the water. Other types of current and other frequencies and a combination of both should be tested as well as alternative electrode geometries also with respect to blood spots which occasionally occurred in the muscles preferably of bigger eels (>800 g). For the time being the method laid down in the german legislation is a reasonable compromise and under animal welfare aspects represents a considerable improvement.

Item Type: Article
Title: Zum tierschutzgerechten Betäuben und Töten von Aal
Personal Creator/Author:
CreatorsEmail
Kuhlmann, Holmer
Münkner, Werner
Oehlenschläger, JörgJ.Oehlenschlaeger@gmx.net
Refereed: No
Journal or Publication Title: Informationen für die Fischwirtschaft aus der Fischereiforschung
Volume: 48
Number: 2
Page Range: pp. 82-89
Date: 2001
ISSN: 1437-5842
Contact Email Address: J.Oehlenschlaeger@gmx.net
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: Marketing; processing quality; new method; industrial processing; technological steps
Subjects: Engineering
Fisheries
Item ID: 3159
Depositing User: Horst Bahl
Date Deposited: 17 Apr 2010 12:37
Last Modified: 10 Nov 2012 14:22
Related URLs:
URI: http://aquaticcommons.org/id/eprint/3159

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