Electrical stunning by decapitation or chilling of African catfish (Clarias gariepinus): assessment of behavioural and neural parameters and product quality

B. Lambooij, R.J. Kloosterboer, M.A. Gerritzen, G. Andre, M. Veldman, J.W. van de Vis

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13 Citations (Scopus)

Abstract

The objective of this study was to assess neural and behavioural responses in farmed African catfish (Clarias gariepinus) upon electrical stunning in combination with decapitation or chilling. To assess the possibility of scaling up one or both experimental methods, two trials were performed in an experimental setting. The product quality of the collected samples was compared with the currently applied industrial method: live chilling. After electrical stunning in combination with decapitation, the fish showed spikes alternated with theta and delta waves on the EEG, followed by minimal brain activity after 20±10 s. The same traces on the EEGs were observed after electrical stunning in combination with chilling. Here, minimal brain activity occurred after 22±11 s. Within a confidence level of 95%, the percentage of African catfish that was effectively stunned after administration of an electrical current of 1.5 A dm2, 300 V (50 Hz a.c.), followed by decapitation or chilling was above 91%. The analysis yield and evolution of liquid loss showed significant (P
Original languageEnglish
Pages (from-to)61-70
JournalAquaculture Research
Volume37
Issue number1
DOIs
Publication statusPublished - 2006

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Keywords

  • anguilla-anguilla l.
  • humane slaughter
  • atlantic salmon
  • meat quality
  • transport
  • muscle
  • salar
  • fresh
  • fish
  • pigs

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