Electrical stunning and killing of Atlantic salmon
Atlantic salmon (Salmo salar) at various size 226-1938 g were placed in electric dry stunning either tailor head- first and then exposed to 50 Hz, 240 V AC for 0.5 and thereafter 9.5 s of electricity. This to verify whether the animal is rendered unconscious prior to killing by immersing the animal...
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ftnofima:oai:nofima.brage.unit.no:11250/3105909 2023-12-31T10:04:38+01:00 Electrical stunning and killing of Atlantic salmon van de Vis, Hans Reinert, Henny Grimsbø, Endre Roth, Bjørn 2023 application/pdf https://hdl.handle.net/11250/3105909 eng eng Nofima AS Nofima rapportserie Fiskeri- og havbruksnæringens forskningsfinansiering: 90112 Nofima AS: 13705 urn:isbn:978-82-8296-762-4 https://hdl.handle.net/11250/3105909 cristin:2208193 9 28/2023 Research report 2023 ftnofima 2023-12-06T23:50:45Z Atlantic salmon (Salmo salar) at various size 226-1938 g were placed in electric dry stunning either tailor head- first and then exposed to 50 Hz, 240 V AC for 0.5 and thereafter 9.5 s of electricity. This to verify whether the animal is rendered unconscious prior to killing by immersing the animal into cold brine (-14 to -18 °C) or hypoxic water, supersaturated with CO2. In addition, salmon from 2000 to 5000 g were exposed to head stunning only. Behaviour, heart (ECG) and brain (EEG) activity were monitored until animal was classed as dead. Post the treatment, the internal temperature of the animal was measured placing loggers into the neuro and heart cavity. The electric potential across the brain was also measured. A preliminary evaluation of the EEG and ECG registrations in the individual fish showed that loss of consciousness can be induced within 0.5 second and consciousness can be prolonged without recovery when the cold brine or seawater saturated with carbon dioxide is applied as killing method. Our results also suggest that the current can be applied head to tail, which facilitates immediate stunning of Atlantic salmon in a commercial setting. We conclude that electrical stunning in combination with cold brine is effective for humane stunning and killing Atlantic salmon. Electrical stunning and killing of Atlantic salmon publishedVersion Report Atlantic salmon Salmo salar Nofima Knowledge Archive (Brage) |
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Open Polar |
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Nofima Knowledge Archive (Brage) |
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English |
description |
Atlantic salmon (Salmo salar) at various size 226-1938 g were placed in electric dry stunning either tailor head- first and then exposed to 50 Hz, 240 V AC for 0.5 and thereafter 9.5 s of electricity. This to verify whether the animal is rendered unconscious prior to killing by immersing the animal into cold brine (-14 to -18 °C) or hypoxic water, supersaturated with CO2. In addition, salmon from 2000 to 5000 g were exposed to head stunning only. Behaviour, heart (ECG) and brain (EEG) activity were monitored until animal was classed as dead. Post the treatment, the internal temperature of the animal was measured placing loggers into the neuro and heart cavity. The electric potential across the brain was also measured. A preliminary evaluation of the EEG and ECG registrations in the individual fish showed that loss of consciousness can be induced within 0.5 second and consciousness can be prolonged without recovery when the cold brine or seawater saturated with carbon dioxide is applied as killing method. Our results also suggest that the current can be applied head to tail, which facilitates immediate stunning of Atlantic salmon in a commercial setting. We conclude that electrical stunning in combination with cold brine is effective for humane stunning and killing Atlantic salmon. Electrical stunning and killing of Atlantic salmon publishedVersion |
format |
Report |
author |
van de Vis, Hans Reinert, Henny Grimsbø, Endre Roth, Bjørn |
spellingShingle |
van de Vis, Hans Reinert, Henny Grimsbø, Endre Roth, Bjørn Electrical stunning and killing of Atlantic salmon |
author_facet |
van de Vis, Hans Reinert, Henny Grimsbø, Endre Roth, Bjørn |
author_sort |
van de Vis, Hans |
title |
Electrical stunning and killing of Atlantic salmon |
title_short |
Electrical stunning and killing of Atlantic salmon |
title_full |
Electrical stunning and killing of Atlantic salmon |
title_fullStr |
Electrical stunning and killing of Atlantic salmon |
title_full_unstemmed |
Electrical stunning and killing of Atlantic salmon |
title_sort |
electrical stunning and killing of atlantic salmon |
publisher |
Nofima AS |
publishDate |
2023 |
url |
https://hdl.handle.net/11250/3105909 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
9 28/2023 |
op_relation |
Nofima rapportserie Fiskeri- og havbruksnæringens forskningsfinansiering: 90112 Nofima AS: 13705 urn:isbn:978-82-8296-762-4 https://hdl.handle.net/11250/3105909 cristin:2208193 |
_version_ |
1786835312690855936 |