Slaughter of Atlantic salmon (Salmo salar L.) in the presence of carbon monoxide

The different stunning methods for Atlantic salmon can still be improved with regard to animal welfare. Salmon exposed to carbon monoxide expressed no aversive reactions towards CO as such. CO exposed fish showed an earlier onset of rigour mortis and a faster decrease in muscle pH due to depletion o...

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Bibliographic Details
Published in:Fish physiology and biochemistry 2013-08, Vol.39 (4), p.871-879
Main Authors: Bjørlykke, Gry Aletta, Kvamme, Bjørn Olav, Raae, Arnt J., Roth, Bjorn, Slinde, Erik
Format: Article
Language:English
Subjects:
Animal Anatomy
Animal Biochemistry
Animal euthanasia
Animal Physiology
Animal welfare
Animals
Behavior, Animal
Biomedical and Life Sciences
Brain - metabolism
Brain research
Carbon dioxide
Carbon Monoxide
Freshwater & Marine Ecology
Globins - metabolism
Histology
Hydrocortisone - blood
Hydrogen-Ion Concentration
Hypoxia
Life Sciences
Marine
Metabolism
Morphology
Muscles - chemistry
Nerve Tissue Proteins - metabolism
Oxygen depletion
Rigor Mortis
Salmo salar
Salmo salar - metabolism
Salmon
Stress
Tilapia
Zoology
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Summary:The different stunning methods for Atlantic salmon can still be improved with regard to animal welfare. Salmon exposed to carbon monoxide expressed no aversive reactions towards CO as such. CO exposed fish showed an earlier onset of rigour mortis and a faster decrease in muscle pH due to depletion of oxygen during the treatment. Exposure to CO did increase the level of cortisol compared to undisturbed control fish, but the increase was less than in the water only control group. Neuroglobin, a CO binding globin, was found in salmon brain and Saccus vasculosus , a richly vascularized sac connected to the fish brain. Binding of CO to neuroglobin during sedation might possibly improve animal welfare.
ISSN:0920-1742
1573-5168
DOI:10.1007/s10695-012-9747-5