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dc.contributor.authorSalgado-Ismodes, Andrés
dc.contributor.authorTaipale, Sami
dc.contributor.authorPirhonen, Juhani
dc.date.accessioned2020-01-14T11:15:54Z
dc.date.available2020-01-14T11:15:54Z
dc.date.issued2020
dc.identifier.citationSalgado-Ismodes, A., Taipale, S., & Pirhonen, J. (2020). Effects of progressive decrease of feeding frequency and re-feeding on production parameters, stomach capacity and muscle nutritional value in rainbow trout (Oncorhynchus mykiss). <i>Aquaculture</i>, <i>519</i>, Article 734919. <a href="https://doi.org/10.1016/j.aquaculture.2019.734919" target="_blank">https://doi.org/10.1016/j.aquaculture.2019.734919</a>
dc.identifier.otherCONVID_34034881
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/67275
dc.description.abstractFeeds and feeding constitute the major part of costs in intensive aquaculture. Any action to reduce feeding costs without negatively affecting fish production parameters and flesh quality would improve profitability of farming. Therefore, we studied the effects of feeding frequency on production parameters, stomach capacity and nutritional value of muscle in juvenile rainbow trout (Oncorhynchus mykiss) in an experiment with two stages. First, during the nine-week “starvation period” we fed rainbow trout (initial weight c. 40 g) with four different feeding protocols in an attempt to adapt the fish to a progressive decrease in the number of feeding days. During the second stage, a four-week “re-feeding period”, all fish were fed in excess on weekdays. Fish growth, feed intake, stomach size, and biomolecule content of muscle were monitored as response variables. During the starvation period, feed intake and growth decreased along with the number of feeding days. Compensatory growth during the refeeding was either only modest or absent. The fish in the starved groups were unable to significantly increase their stomach capacities. Starvation and re-feeding had only a slight effect on muscle fatty acid and amino acid composition. The used feeding protocols did not affect important production parameters (e.g. feed conversion or size variation). Our results suggest that despite differences in fish growth starvation and re-feeding hardly affect the nutritional value of fish. It is possible that several decades in captivity have made rainbow trout incapable to adjust their stomach size in respect to feeding frequency.en
dc.format.mimetypeapplication/pdf
dc.languageeng
dc.language.isoeng
dc.publisherElsevier
dc.relation.ispartofseriesAquaculture
dc.rightsCC BY-NC-ND 4.0
dc.subject.othercompensatory growth
dc.subject.otherstomach volume
dc.subject.othersalmonids
dc.subject.otherfatty acids
dc.subject.otheramino acids
dc.subject.otherfeed conversion ratio
dc.titleEffects of progressive decrease of feeding frequency and re-feeding on production parameters, stomach capacity and muscle nutritional value in rainbow trout (Oncorhynchus mykiss)
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-202001141228
dc.contributor.laitosBio- ja ympäristötieteiden laitosfi
dc.contributor.laitosDepartment of Biological and Environmental Scienceen
dc.contributor.oppiaineAkvaattiset tieteetfi
dc.contributor.oppiaineAquatic Sciencesen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.description.reviewstatuspeerReviewed
dc.relation.issn0044-8486
dc.relation.volume519
dc.type.versionacceptedVersion
dc.rights.copyright© 2019 Elsevier B.V.
dc.rights.accesslevelopenAccessfi
dc.subject.ysokasvu
dc.subject.ysorehut
dc.subject.ysolohikalat
dc.subject.ysoruokinta
dc.subject.ysoaminohapot
dc.subject.ysorasvahapot
dc.format.contentfulltext
jyx.subject.urihttp://www.yso.fi/onto/yso/p5789
jyx.subject.urihttp://www.yso.fi/onto/yso/p3267
jyx.subject.urihttp://www.yso.fi/onto/yso/p4245
jyx.subject.urihttp://www.yso.fi/onto/yso/p2295
jyx.subject.urihttp://www.yso.fi/onto/yso/p9530
jyx.subject.urihttp://www.yso.fi/onto/yso/p4800
dc.rights.urlhttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.relation.doi10.1016/j.aquaculture.2019.734919
jyx.fundinginformationThe authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.


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