Protein diets promote the maturation of oocytes and spawning of Piaractus mesopotamicus kept in cages

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dc.contributor.authorBittencourt, F. [UNESP]
dc.contributor.authorde Souza, B. E. [UNESP]
dc.contributor.authorLui, T. A.
dc.contributor.authorBorella, M. I.
dc.contributor.authorBoscolo, W. R.
dc.contributor.authorFeiden, A.
dc.contributor.authorRomagosa, E.
dc.contributor.institutionAgência Paulista de Tecnologia dos Agronegócios (APTA)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual do Oeste do Paraná (UNIOESTE)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:31:44Z
dc.date.available2014-05-20T15:31:44Z
dc.date.issued2012-12-01
dc.description.abstractThe objective of this study was to evaluate the effects of balanced diets on the maturation of oocytes and the reproductive performance of P. mesopotamicus in cages. A completely random design with 224 fish in 16 cages measuring 5 m(3) was employed for this purpose. The treatments consisted of diets containing 18, 24, 30, and 36% crude protein (CP) provided ad libitum. The external and internal morphological characteristics of the specimens were examined, as well as: the position of the germinal vesicle, the distribution of oocyte diameters, the fertilization and hatching rates, the number of oocytes released, the total number of oocytes, the remaining weight and total weight of the ovaries, the gonadosomatic index, the condition factor (K), and the histology of the oocytes and ovaries post-spawning and during ovarian regression. The diameters of the oocytes collected before the first hormonal application displayed a unimodal distribution for the lowest protein content and a polymodal distribution for the other treatments. A similar situation was seen during spawning. The lowest fertilization and hatching rates were found as a consequence of the treatment with 30% CP (P < 0.05). The greatest hatching rate occurred in the females fed 18% CP. The greatest total oocyte weight was found in the specimens that received between 30 and 36% CP. The lowest K index was found in the females fed 36% CP. In conclusion, a diet containing 18% CP satisfies the reproductive requirements of females adapted to this system.en
dc.description.affiliationAPTA, Inst Pesca, São Paulo, Brazil
dc.description.affiliationUniv São Paulo, BR-09500900 São Paulo, Brazil
dc.description.affiliationUniversidade Estadual do Oeste do Paraná (UNIOESTE), Toledo, Parana, Brazil
dc.description.affiliationUniv Estadual Paulista, CAUNESP, Ctr Aquicultura, São Paulo, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, CAUNESP, Ctr Aquicultura, São Paulo, Brazil
dc.format.extent886-893
dc.identifierhttp://dx.doi.org/10.1111/jai.12060
dc.identifier.citationJournal of Applied Ichthyology. Hoboken: Wiley-blackwell, v. 28, n. 6, p. 886-893, 2012.
dc.identifier.doi10.1111/jai.12060
dc.identifier.issn0175-8659
dc.identifier.urihttp://hdl.handle.net/11449/40793
dc.identifier.wosWOS:000310976600006
dc.language.isoeng
dc.publisherWiley-Blackwell
dc.relation.ispartofJournal of Applied Ichthyology
dc.relation.ispartofjcr0.774
dc.relation.ispartofsjr0,532
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleProtein diets promote the maturation of oocytes and spawning of Piaractus mesopotamicus kept in cagesen
dc.typeArtigo
dcterms.licensehttp://olabout.wiley.com/WileyCDA/Section/id-406071.html
dcterms.rightsHolderWiley-blackwell

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Jaboticabal - CAUNESP - Centro de Aquicultura da Unesp