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Fast growing greater amberjack post-larvae require a high energy-high protein weaning diet

2019-01Journal article Restricted access
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dc.contributor.authorNavarro-Guillén, Carmen
dc.contributor.authorConceicao, L. E. C.
dc.contributor.authorPinto, W.
dc.contributor.authorSiguero, I
dc.contributor.authorUrrutia, P.
dc.contributor.authorMoyano, F. J.
dc.contributor.authorYufera, M.
dc.date.accessioned2020-07-24T10:53:00Z
dc.date.available2020-07-24T10:53:00Z
dc.date.issued2019-01
dc.description.abstractLarvae and early juveniles of fast-growing fish species show tremendous growth potential, leading to higher requirements for protein, high-unsaturated fatty acids, and other nutrients. Several commercial weaning diets with relatively high success have been developed for low/moderate-growing species however, additional challenges are outlined to meet growth potential and energy requirements of such fast-growing species. The objective of the present study was to evaluate two commercial microdiets for marine fish, one having simultaneously a very high protein and high lipid contents (HIGH), and another (MOD) with a high protein and moderate lipid content, in a growth performance trial with greater amberjack post-larvae from 33 to 78 days after hatching. Moreover, histological preparations of liver, anterior and posterior intestine were assessed for hepatic and intestinal lipid inclusions quantification and gut epithelial brush height measurement. Activities of the digestive enzymes: pepsin, trypsin, chymotrypsin, lipase and amylase were also analyzed. Post-larvae fed HIGH microdiet exhibited higher final weight and lower feed conversion ratio that those fed on MOD microdiet. Liver displayed a higher level of lipid inclusions for the MOD diet than for HIGH diet. Moreover, enterocytes of posterior intestine presented a much higher level of supranuclear vacuoles for the HIGH diet compared to MOD diet. The lower Trypsin/Chymotrypsin ratio observed at the end of the experiment in larvae fed on MOD diet may indicate a deficiency in protein of this diet. Together, these results support that larvae of greater amberjack, and likely other fast-growing marine fish species, require high protein-high lipid microdiets. The use of microdiets developed targeting slower growing marine species may lead to sub-optimal performances in fast-growing larvae.
dc.description.sponsorshipEurostars [E! 7994]
dc.description.sponsorshipFEDER through PO Algarve 21 [30200]
dc.identifier.doi10.1016/j.aquaculture.2018.09.037
dc.identifier.issn0044-8486
dc.identifier.issn1873-5622
dc.identifier.urihttp://hdl.handle.net/10400.1/14433
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier Science Bv
dc.subjectBass Dicentrarchus-Labrax
dc.subjectSeriola-lalandi larvae
dc.subjectSeabream Sparus-Aurata
dc.subjectSalmo-lalar L.
dc.subjectDigestive enzymes
dc.subjectOntogenic development
dc.subjectGrowth-performance
dc.subjectSoybean-meal
dc.subjectLipid-levels
dc.subjectDumerili
dc.titleFast growing greater amberjack post-larvae require a high energy-high protein weaning diet
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage202
oaire.citation.startPage195
oaire.citation.titleAquaculture
oaire.citation.volume499
person.familyNameNavarro-Guillén
person.givenNameCarmen
person.identifier.ciencia-id281B-5543-D0F3
person.identifier.orcid0000-0001-5490-0328
person.identifier.scopus-author-id55901593400
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublication84423569-1ee0-4ed5-8e95-d5ae51008cd3
relation.isAuthorOfPublication.latestForDiscovery84423569-1ee0-4ed5-8e95-d5ae51008cd3

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