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Nitrogen stunning of rainbow trout
Author(s) -
Wills Carmel C.,
Zampacavallo Giulia,
Poli BiancaMaria,
Proctor Marlene R.M.,
Henehan Gary T.M.
Publication year - 2006
Publication title -
international journal of food science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.831
H-Index - 96
eISSN - 1365-2621
pISSN - 0950-5423
DOI - 10.1111/j.1365-2621.2005.01082.x
Subject(s) - stunning , rainbow trout , nitrogen , myocardial stunning , fish <actinopterygii> , carbon dioxide , fishery , chemistry , zoology , biology , medicine , ischemia , organic chemistry
Summary This study examined the use of nitrogen gas for stunning of Rainbow Trout. It was found that nitrogen could be used as an effective stunning method and that the strong aversive reaction reported for carbon dioxide stunning was not observed. Measurement of ATP, its metabolites and pH were carried out to evaluate the effects of nitrogen stunning on post mortem muscle biochemistry. This treatment was compared to percussive stunning and air asphyxiation. Post mortem ATP levels in nitrogen stunned fish (1.96 ± 0.36 μ mol g −1 ) were significantly higher than for asphyxiated fish (0.2 ± 0.11 μ mol g −1 ) but lower than values for percussively stunned fish (5.9 ± 0.89 μ mol g −1 ). This work indicates that the use of gasses other than carbon dioxide for stunning of fish deserves further study.