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dc.creatorTeuling, E.en_US
dc.creatorSchrama, J.W.en_US
dc.creatorAgboola, J.O.en_US
dc.creatorWierenga, P.A.en_US
dc.creatorGruppen, H.en_US
dc.date.accessioned2020-01-30T09:16:04Z
dc.date.available2020-01-30T09:16:04Z
dc.date.issued2019
dc.identifier.citationAquaculture, 499: 269-282.en_US
dc.identifier.issn0044-8486en_US
dc.identifier.urihttps://hdl.handle.net/20.500.12348/3870
dc.description.abstractIn this study the correlation between the accessibility of nutrients and in vivo nutrient digestibility was tested on the marine microalga Nannochloropsis gaditana in juvenile Nile tilapia (Oreochromis niloticus). It was hypothesized that disrupting the cell walls of microalgae increases the nutrient accessibility and digestibility. N. gaditana biomass was subjected to physical treatments (pasteurization, freezing, freeze drying) or mechanical treatments (bead milling) to influence its cell wall integrity. These treatments resulted in an up to 4 x increase in in vitro accessibility of N. gaditana nutrients, assessed from measurements of leaching and susceptibility to protein hydrolysis. Apparent digestibility coefficients of macronutrients, dry matter, energy, phosphorus and calcium of untreated and treated microalgae biomass were determined in triplicate, at a 30% diet inclusion level. Bead milling the algae led to the highest increase in in vivo digestibility of dry matter, energy, protein, fat, ash and calcium on ingredient level, compared to untreated algae biomass. This includes an increase in apparent digestibility coefficient (ADC) of protein and fat from 62 to 78% and from 50 to 82%, respectively. ADCs of total carbohydrates and of phosphorus were not affected by algal cell disruption. In vivo digestibilities of N. gaditana dry matter, energy, protein, and fat were positively correlated (p < .001; r = 0.91) with the nutrient accessibility of N. gaditana, as estimated with in vitro nutrient leaching analyses. This shows that the in vitro methods used are effective ways to assess the effect of mechanical and physical treatments on in vivo nutrient quality of a single ingredient. The results of this study confirm that nutrient accessibility plays a significant role in the nutrient digestibility of the microalga Nannochloropsis gaditana in Nile tilapia.en_US
dc.formatPDFen_US
dc.languageenen_US
dc.publisherElsevieren_US
dc.rightsCC-BY-NC-SA-4.0en_US
dc.subjectin-vitroen_US
dc.subjectalgaeen_US
dc.titleCell wall disruption increases bioavailability of Nannochloropsis gaditana nutrients for juvenile Nile tilapia (Oreochromis niloticus)en_US
dc.typeJournal Articleen_US
dcterms.bibliographicCitationTeuling, E. et al. (2019). Cell wall disruption increases bioavailability of Nannochloropsis gaditana nutrients for juvenile Nile tilapia (Oreochromis niloticus). Aquaculture, 499: 269-282.
dc.description.versionPeer Review
cg.contributor.crpFISHen_US
cg.contributor.funderCGIAR System Officeen_US
cg.coverage.countryNetherlandsen_US
cg.coverage.regionWestern Europeen_US
cg.identifier.worldfish4540
cg.subject.agrovocfeedsen_US
cg.subject.agrovocfatty acidsen_US
cg.subject.agrovocdieten_US
cg.subject.agrovocdigestibilityen_US
cg.subject.agrovocfishen_US
cg.subject.agrovoccell wallsen_US
cg.subject.agrovocnutrient utilizationen_US
cg.subject.agrovoctilapiaen_US
cg.contributor.affiliationWageningen University & Research Centreen_US
cg.contributor.affiliationWorldFishen_US
cg.identifier.statusOpen accessen_US
cg.identifier.ISIindexedISI indexeden_US
cg.description.themeSustainable aquacultureen_US
dc.identifier.doihttps://doi.org/10.1016/j.aquaculture.2018.09.047


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