A systematic literature review of the major factors causing yield gap by affecting growth, feed conversion ratio and survival in Nile tilapia (Oreochromis niloticus)

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dc.contributor.authorMengistu, Samuel Bekele
dc.contributor.authorMulder, Han A.
dc.contributor.authorBenzie, John A. H.
dc.contributor.authorKomen, Hans
dc.contributor.funderKoepon Foundationen
dc.contributor.funderInternational Fund for Agricultural Developmenten
dc.contributor.funderEuropean Commissionen
dc.contributor.funderConsultative Group on International Agricultural Research (CGIAR)en
dc.date.accessioned2019-11-19T10:15:23Z
dc.date.available2019-11-19T10:15:23Z
dc.date.issued2019-03-18
dc.description.abstractAbstract Productivity among small- and medium-scale tilapia farms varies considerably. The difference between the best performers and lower ones (yield gap), is affected by differences in growth rate and feed conversion ratio (FCR). FCR at the farm level is strongly influenced by survival of fish. In this study a systematic literature review of two databases (ASFA and CAB-Abstracts) identified 1973 potentially relevant articles. Data from 32 articles that met the inclusion criteria were analysed using linear mixed models for the most important factors with significant contributions to growth [investigated through analysis of the thermal growth coefficient (TGC)], survival and FCR of Nile tilapia. Increasing crude protein (CP), dissolved oxygen (DO) and pH significantly decreased FCR and increased TGC. Increasing stocking weight (SW) significantly improved both FCR and survival. Temperature had the largest effect on FCR followed by DO, pH and CP. DO had the largest effect on TGC followed by CP and pH. This study confirms that the optimal rearing temperature for Nile tilapia is between 27 and 32°C. Improving management to optimize DO (> 5 mg/L), stocking density (3–5 fish/m2), SW (> 10 g) and CP (25 − 30%) will improve performance and survival in small- and medium-scale tilapia farming. However, it is hard to influence temperature in ponds and cages while DO is largely influenced by aeration. Since many small- and medium-sized farms do not have aeration, these major tilapia farming systems could benefit from genetically improved strains selected for resilience to highly fluctuating diurnal temperature and DO levels.en
dc.description.sponsorship200000153en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationMengistu, S.B., Mulder, H.A., Benzie, J.A. and Komen, H., 2019. A systematic literature review of the major factors causing yield gap by affecting growth, feed conversion ratio and survival in Nile tilapia (Oreochromis niloticus). Reviews in Aquaculture. (18pp). DOI:10.1111/raq.12331en
dc.identifier.doi10.1111/raq.12331en
dc.identifier.eissn1753-5131
dc.identifier.endpage18en
dc.identifier.issn1753-5123
dc.identifier.journaltitleReviews in Aquacultureen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/9050
dc.language.isoenen
dc.publisherJohn Wiley & Sonsen
dc.relation.urihttps://onlinelibrary.wiley.com/doi/full/10.1111/raq.12331
dc.rights© 2019 The Authors. Reviews in Aquaculture Published by John Wiley & Sons Australia, Ltden
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subjectFeed conversion efficiencyen
dc.subjectGrowthen
dc.subjectSurvivalen
dc.subjectTilapiaen
dc.subjectYield gapen
dc.titleA systematic literature review of the major factors causing yield gap by affecting growth, feed conversion ratio and survival in Nile tilapia (Oreochromis niloticus)en
dc.typeArticle (peer-reviewed)en
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