Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/7569
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dc.contributor.authorBell, J Gordonen_UK
dc.contributor.authorTocher, Douglas Ren_UK
dc.contributor.authorFarndale, Bruce Men_UK
dc.contributor.authorCox, David Ien_UK
dc.contributor.authorMcKinney, Richard Wen_UK
dc.contributor.authorSargent, John Ren_UK
dc.date.accessioned2013-10-08T01:33:59Z-
dc.date.available2013-10-08T01:33:59Zen_UK
dc.date.issued1997-05en_UK
dc.identifier.urihttp://hdl.handle.net/1893/7569-
dc.description.abstractThe aim of this study was to measure the changes in lipid metabolism which occur during smoltification and seawater transfer in Atlantic salmon (Salmo salar). Duplicate groups of Atlantic salmon parr were fed diets containing either fish oil (FO) or a blend of linseed and rapeseed oils, vegetable oil (VO), from October (week 0) to seawater transfer in May (week 26). From May to August (weeks 26–43), all fish were fed a fish oil-containing diet. Fatty acyl desaturation and elongation activity were followed in isolated hepatocytes incubated with radioactive 18:3n−3 and 18:2n−6. Metabolism of 18:3n−3 was consistently around 5-fold greater than metabolism of 18:2n−6, and total metabolism of both substrate polyunsaturated fatty acids (PUFA) was increased in fish fed both VO and FO up to seawater transfer after which desaturation activities were reduced. Desaturation activities with both 18:3n−3 and 18:2n−6 were significantly greater in fish fed VO, compared to fish fed FO, at 22 and 26 wk. Arachidonic acid (20:4n−6; AA) in liver polar lipids (PL) of fish fed VO increased consistently from weeks 0–22 but varied after seawater transfer. In fish fed FO, AA in liver PL remained constant up to week 17 before increasing at seawater transfer and leveling off thereafter. Eicosapentaenoic acid (20:5n−3; EPA) in liver PL of fish fed VO decreased significantly from week 0–22 before rising at seawater transfer and increasing rapidly posttransfer. EPA in liver PL of fish fed FO showed a similar trend except EPA was always greater in the freshwater phase compared to fish fed VO. Docosahexaenoic acid (DHA) levels in liver PL of fish fed VO remained constant in the freshwater phase before increasing following seawater transfer. In fish fed FO, DHA in liver PL increased from weeks 0–17 reducing and leveling off postseawater transfer. The levels of PGF2α and PGF3α were measured in isolated gill cells stimulated with calcium ionophore A23187. PGF2α production in fish fed VO increased significantly between 0–7 wk before decreasing toward seawater transfer. After transfer, PGF2α production increased to a peak at 35 wk. PGF2α production in fish fed FO was not significantly altered during the trial period. The changes in PGF3α production were broadly similar to those occurring with PGF2α, but the latter was always in excess of the former (2-to 4-fold). Plasma chloride concentrations in fish subjected to seawater challenge at 20 wk were significantly lower in fish fed VO compared to those fed FO. This study has provided new information on the changes in lipid metabolism which accompany parr-smolt transformation and suggests that diets which have a fatty acid composition more similar to that in aquatic invertebrates may be beneficial in effecting successful seawater adaptation.en_UK
dc.language.isoenen_UK
dc.publisherSpringeren_UK
dc.relationBell JG, Tocher DR, Farndale BM, Cox DI, McKinney RW & Sargent JR (1997) The effect of dietary lipid on polyunsaturated fatty acid metabolism in Atlantic salmon (Salmo salar) undergoing Parr-Smolt transformation. Lipids, 32 (5), pp. 515-525. https://doi.org/10.1007/s11745-997-0066-4en_UK
dc.rightsThe publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.en_UK
dc.rights.urihttp://www.rioxx.net/licenses/under-embargo-all-rights-reserveden_UK
dc.titleThe effect of dietary lipid on polyunsaturated fatty acid metabolism in Atlantic salmon (Salmo salar) undergoing Parr-Smolt transformationen_UK
dc.typeJournal Articleen_UK
dc.rights.embargodate3000-01-01en_UK
dc.rights.embargoreason[tocher_lipids32_1997.pdf] The publisher does not allow this work to be made publicly available in this Repository therefore there is an embargo on the full text of the work.en_UK
dc.identifier.doi10.1007/s11745-997-0066-4en_UK
dc.citation.jtitleLipidsen_UK
dc.citation.issn1558-9307en_UK
dc.citation.issn0024-4201en_UK
dc.citation.volume32en_UK
dc.citation.issue5en_UK
dc.citation.spage515en_UK
dc.citation.epage525en_UK
dc.citation.publicationstatusPublisheden_UK
dc.citation.peerreviewedRefereeden_UK
dc.type.statusVoR - Version of Recorden_UK
dc.author.emaild.r.tocher@stir.ac.uken_UK
dc.contributor.affiliationInstitute of Aquacultureen_UK
dc.contributor.affiliationInstitute of Aquacultureen_UK
dc.contributor.affiliationUniversity of Stirlingen_UK
dc.contributor.affiliationMarine Harvest McConnell Ltden_UK
dc.contributor.affiliationBOCM-Paulsen_UK
dc.contributor.affiliationUniversity of Stirlingen_UK
dc.identifier.isiWOS:A1997XF04500007en_UK
dc.identifier.scopusid2-s2.0-0030945572en_UK
dc.identifier.wtid782562en_UK
dc.contributor.orcid0000-0002-8603-9410en_UK
dcterms.dateAccepted1997-05-31en_UK
dc.date.filedepositdate2012-08-22en_UK
rioxxterms.typeJournal Article/Reviewen_UK
rioxxterms.versionVoRen_UK
local.rioxx.authorBell, J Gordon|en_UK
local.rioxx.authorTocher, Douglas R|0000-0002-8603-9410en_UK
local.rioxx.authorFarndale, Bruce M|en_UK
local.rioxx.authorCox, David I|en_UK
local.rioxx.authorMcKinney, Richard W|en_UK
local.rioxx.authorSargent, John R|en_UK
local.rioxx.projectInternal Project|University of Stirling|https://isni.org/isni/0000000122484331en_UK
local.rioxx.freetoreaddate3000-01-01en_UK
local.rioxx.licencehttp://www.rioxx.net/licenses/under-embargo-all-rights-reserved||en_UK
local.rioxx.filenametocher_lipids32_1997.pdfen_UK
local.rioxx.filecount1en_UK
local.rioxx.source0024-4201en_UK
Appears in Collections:Aquaculture Journal Articles

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