Effects of dietary lipid substitution on swimming performance during the early developmental stages of Chinook salmon (Oncorhynchus tshawytscha)

Regan, M., Kuchel, L., Rummer, J., Machala, A., Grant, A., Schulte, P., Brauner, C., Balfry, S., Higgs, D. and Devlin, R. H. (2006). Effects of dietary lipid substitution on swimming performance during the early developmental stages of Chinook salmon (Oncorhynchus tshawytscha). In: Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology: Abstracts of the Annual Main Meeting of the Society for Experimental Biology, University of Kent at Canterbury, UK, 2nd-7th April, 2006. Annual Main Meeting of the Society for Experimental Biology, University of Kent at Canterbury, UK, (S72-S72). 2-7 April, 2006. doi:10.1016/j.cbpa.2006.01.039


Author Regan, M.
Kuchel, L.
Rummer, J.
Machala, A.
Grant, A.
Schulte, P.
Brauner, C.
Balfry, S.
Higgs, D.
Devlin, R. H.
Title of paper Effects of dietary lipid substitution on swimming performance during the early developmental stages of Chinook salmon (Oncorhynchus tshawytscha)
Conference name Annual Main Meeting of the Society for Experimental Biology
Conference location University of Kent at Canterbury, UK
Conference dates 2-7 April, 2006
Proceedings title Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology: Abstracts of the Annual Main Meeting of the Society for Experimental Biology, University of Kent at Canterbury, UK, 2nd-7th April, 2006   Check publisher's open access policy
Place of Publication New York
Publisher Elsevier
Publication Year 2006
DOI 10.1016/j.cbpa.2006.01.039
ISSN 1095-6433
Volume 143
Issue 4
Start page S72
End page S72
Total pages 1
Language eng
Abstract/Summary The marine fish oils present in farm feed not only comprise a substantial proportion of the cost of aquacultural salmon production, they are also responsible for the accumulation of anthropogenic contaminants in the fish, such as PCBs and dioxins. Our study looks to assess the practicality of substituting these marine fish oils with canola oil, a vegetablederivative which has the potential to decrease feed costs in salmon production, as well as reduce levels of harmful contaminants present in the fish. Over seven months, four groups of Chinook salmon (Oncorhynchus tshawytscha) were fed one of four diets differing in their respective canola oil/anchovy oil ratios (0/100, 25/75, 50/50, and 75/25 total lipid content). These ratios, as well as the feeding of the fish earlier in development, was to supplement a previous study investigating the effects of dietary lipids on fish physiology so as to further investigate the effects of canola oil replacement. Swimming performance was measured for the fish of each group through the determination of their critical swimming velocity (Ucrit), and from these values the overall physical condition of the fish could be inferred. Upon fatiguing, other indicators of osmoregulatory stress were measured in the fish, including gill Na+/K+ ATPase activity and morphology, plasma osmolarity, Na+, Cl, and muscle water content. No significant differences between the diets have been found regarding the fishes’ swimming performance or muscle water content, suggesting canola oil as a viable substitute for anchovy oil in Chinook salmon.
Subjects 0606 Physiology
Q-Index Code EX
Q-Index Status Provisional Code
Institutional Status Unknown

 
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Created: Wed, 25 Feb 2009, 14:57:21 EST by Ms Julie Schofield on behalf of Faculty of Science