Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/1701
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dc.contributor.authorOxley, Anthonyen_UK
dc.contributor.authorBogevik, Andre Sen_UK
dc.contributor.authorHenderson, R Jamesen_UK
dc.contributor.authorWaagbo, Runeen_UK
dc.contributor.authorTocher, Douglas Ren_UK
dc.contributor.authorOlsen, Rolf Een_UK
dc.date.accessioned2017-07-12T22:21:26Z-
dc.date.available2017-07-12T22:21:26Z-
dc.date.issued2009-10en_UK
dc.identifier.urihttp://hdl.handle.net/1893/1701-
dc.description.abstractCalanoid copepods are a rich source of n-3 highly unsaturated fatty acids (HUFA) for potential use in aquafeeds. However, as copepod oil is primarily composed of wax esters (WE), there are concerns over the efficiency of wax ester, versus triacylglycerol (TAG), digestion and utilisation in fish. As smoltification represents a period of major physiological adaptation, the present study examined the digestibility of a high wax ester diet (Calanus oil; 230 g kg-1 diet; 48% WE, 26% TAG), compared to a triacylglycerol diet (fish oil; 230 g kg-1 diet; 58% TAG), in Atlantic salmon freshwater pre-smolts and seawater post-smolts, of similar age (9 months) and weight (112 g and 141 g initial respectively), over a 98 day period at constant temperature and lighting regimes. Fish grew significantly better, and possessed lower feed conversion ratios (FCR), in seawater than freshwater. However, total lipid apparent digestibility coefficient (ADC) values were significantly lower in seawater fish, as were total fasted bile volumes. Dietary Calanus oil also had a significant effect, reducing growth and lipid ADC values in both freshwater and seawater groups. Post-smolts fed dietary Calanus oil had the poorest lipid ADC values and analysis of faecal lipid class composition revealed that 33% of remaining lipid was wax ester and 32% fatty alcohols. Dietary prevalent 22:1n-11 and 20:1n-9 fatty alcohols were particularly poorly utilised. A decrease in major bile acid, taurocholate, concentration was observed in the bile of dietary Calanus oil groups which could be related to the lower cholesterol content of the diet. It is suggested that, following smoltification and rapid growth in seawater, there is a lag phase in digestive function where bile production is not sufficient to emulsify and render wax esters available for hydrolytic action by luminal lipases. These effects appear to be related to the life stage of the fish and could also represent an upper limit of wax ester inclusion in diets.en_UK
dc.language.isoenen_UK
dc.publisherWiley-Blackwellen_UK
dc.relationOxley A, Bogevik AS, Henderson RJ, Waagbo R, Tocher DR & Olsen RE (2009) Digestibility of Calanus finmarchicus wax esters in Atlantic salmon (Salmo salar) freshwater presmolts and seawater postsmolts maintained at constant water temperature. Aquaculture Nutrition, 15 (5), pp. 459-469. https://doi.org/10.1111/j.1365-2095.2008.00611.xen_UK
dc.rightsPublished in Aquaculture Nutrition. Copyright: Wiley-Blackwell.; The definitive version is available at www3.interscience.wiley.comen_UK
dc.subjectDigestionen_UK
dc.subjectFatty acidsen_UK
dc.subjectBileen_UK
dc.subjectIntestineen_UK
dc.subjectsalinityen_UK
dc.subjectlong-chain fatty alcoholsen_UK
dc.subjectsmoltificationen_UK
dc.subjectgrowthen_UK
dc.subjectFishes Feeding and feedsen_UK
dc.subjectFishes Nutritionen_UK
dc.subjectCopepodaen_UK
dc.titleDigestibility of Calanus finmarchicus wax esters in Atlantic salmon (Salmo salar) freshwater presmolts and seawater postsmolts maintained at constant water temperatureen_UK
dc.typeJournal Articleen_UK
dc.rights.embargodate2010-10-07en_UK
dc.rights.embargoreason[Oxley_AquacultureNutrition.3.pdf] Publisher conditions require a 12 month embargo.en_UK
dc.rights.embargoreason[Oxley_AquacultureNutrition.2.pdf] Publisher conditions require a 12 month embargo.en_UK
dc.rights.embargoreason[Oxley_AquacultureNutrition.pdf] Publisher conditions require a 12 month embargo.en_UK
dc.identifier.doi10.1111/j.1365-2095.2008.00611.xen_UK
dc.citation.jtitleAquaculture Nutritionen_UK
dc.citation.issn1365-2095en_UK
dc.citation.issn1353-5773en_UK
dc.citation.volume15en_UK
dc.citation.issue5en_UK
dc.citation.spage459en_UK
dc.citation.epage469en_UK
dc.citation.publicationstatusPublisheden_UK
dc.citation.peerreviewedRefereeden_UK
dc.type.statusAM - Accepted Manuscripten_UK
dc.type.statusAM - Accepted Manuscripten_UK
dc.type.statusAM - Accepted Manuscripten_UK
dc.author.emaildrt1@stir.ac.uken_UK
dc.citation.date06/10/2008en_UK
dc.contributor.affiliationMatre Aquaculture Research Stationen_UK
dc.contributor.affiliationMatre Aquaculture Research Stationen_UK
dc.contributor.affiliationUniversity of Stirlingen_UK
dc.contributor.affiliationNational Institute of Nutrition and Seafood Research (NIFES)en_UK
dc.contributor.affiliationInstitute of Aquacultureen_UK
dc.contributor.affiliationNational Institute of Nutrition and Seafood Research (NIFES)en_UK
dc.identifier.isiWOS:000269537800002en_UK
dc.identifier.scopusid2-s2.0-69949174017en_UK
dc.identifier.wtid837532en_UK
dc.contributor.orcid0000-0002-8603-9410en_UK
dc.date.accepted2008-05-26en_UK
dcterms.dateAccepted2008-05-26en_UK
dc.date.filedepositdate2009-10-15en_UK
rioxxterms.typeJournal Article/Reviewen_UK
rioxxterms.versionAMen_UK
local.rioxx.authorOxley, Anthony|en_UK
local.rioxx.authorBogevik, Andre S|en_UK
local.rioxx.authorHenderson, R James|en_UK
local.rioxx.authorWaagbo, Rune|en_UK
local.rioxx.authorTocher, Douglas R|0000-0002-8603-9410en_UK
local.rioxx.authorOlsen, Rolf E|en_UK
local.rioxx.projectInternal Project|University of Stirling|https://isni.org/isni/0000000122484331en_UK
local.rioxx.freetoreaddate2010-10-07en_UK
local.rioxx.licencehttp://www.rioxx.net/licenses/under-embargo-all-rights-reserved||2010-10-06en_UK
local.rioxx.licencehttp://www.rioxx.net/licenses/all-rights-reserved|2010-10-07|en_UK
local.rioxx.filenameOxley_AquacultureNutrition.pdfen_UK
local.rioxx.filecount3en_UK
local.rioxx.source1353-5773en_UK
Appears in Collections:Aquaculture Journal Articles

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