Effects of environmental colour on growth of Nile tilapia, Oreochromis niloticus (Linnaeus, 1758), maintained individually or in groups

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dc.contributor.authorLuchiari, A. C. [UNESP]
dc.contributor.authorFreire, F. A. M. [UNESP]
dc.contributor.institutionUniversidade Federal da Paraíba (UFPB)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal Rural do Semi-Árido (UFERSA)
dc.date.accessioned2014-05-20T15:32:55Z
dc.date.available2014-05-20T15:32:55Z
dc.date.issued2009-04-01
dc.description.abstractExamined was the influence of different colours of light on the growth of adult Nile tilapia (Oreochromis niloticus) held either individually (initial size 12.8 +/- 1.1 cm; 62.9 +/- 15.6 g) or in groups (initial size 7.8 +/- 0.8 cm; 17.2 +/- 6.4 g). Various colours (blue 434.5 nm, violet 430.0 nm, red 609.7 nm, green 525.2 nm and yellow 545.2 nm) did not affect weight gain of fish held individually (initial to final weights: blue 62.5 +/- 18.4 to 72.9 +/- 16.0 g, violet 63.5 +/- 17.8 to 78.0 +/- 19.1 g, green 62.1 +/- 13.0 to 72.9 +/- 15.7 g, and yellow 60.4 +/- 20.4 to 71.0 +/- 21.1 g); red seemed to restrict growth (initial to final weights: 65.8 +/- 13.3 to 71.8 +/- 10.8 g). Final weight differences were observed among individuals in groups maintained under blue, violet, red and green light (smaller and larger fish: blue 13.2 +/- 5.0 and 18.9 +/- 7.0 g, violet 17.3 +/- 5.2 and 23.8 +/- 4.7 g, red 14.7 +/- 3.3 and 23.9 +/- 4.7 g, and green 19.4 +/- 7.8 and 28.6 +/- 8.1 g); however, under the yellow light there were no differences in final weights (smaller fish 19.1 +/- 4.8 g; larger fish 26.2 +/- 5.2 g). Under the red light, heterogeneity in growth was observed earlier than with the other colours. It is therefore suggested that the red colour might have some harmful effects on Nile tilapia growth, limiting weight gain when fish are individually maintained, and with weight differences increasing when fish are held in groups. on the other hand, the yellow light seems to be positive for Nile tilapia, as it appears not to affect individually-held fish, but reduces variation in growth of group-maintained fish, promoting growth homogeneity.en
dc.description.affiliationUniversidade Federal da Paraíba (UFPB), Dept Fisiol & Patol, UFPB, BR-58059900 Joao Pessoa, Paraiba, Brazil
dc.description.affiliationUniv Estadual Paulista, Inst Biociencias, Botucatu, SP, Brazil
dc.description.affiliationUniversidade Federal Rural do Semi-Árido (UFERSA), Dept Ciencias Anim, Mossoro, RN, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Inst Biociencias, Botucatu, SP, Brazil
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.format.extent162-167
dc.identifierhttp://dx.doi.org/10.1111/j.1439-0426.2008.01203.x
dc.identifier.citationJournal of Applied Ichthyology. Malden: Wiley-blackwell Publishing, Inc, v. 25, n. 2, p. 162-167, 2009.
dc.identifier.doi10.1111/j.1439-0426.2008.01203.x
dc.identifier.issn0175-8659
dc.identifier.urihttp://hdl.handle.net/11449/41692
dc.identifier.wosWOS:000264185900005
dc.language.isoeng
dc.publisherWiley-Blackwell Publishing, Inc
dc.relation.ispartofJournal of Applied Ichthyology
dc.relation.ispartofjcr0.774
dc.relation.ispartofsjr0,532
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleEffects of environmental colour on growth of Nile tilapia, Oreochromis niloticus (Linnaeus, 1758), maintained individually or in groupsen
dc.typeArtigo
dcterms.licensehttp://olabout.wiley.com/WileyCDA/Section/id-406071.html
dcterms.rightsHolderWiley-blackwell Publishing, Inc

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