Early development of Astronotus ocellatus under stereomicroscopy and scanning electron microscopy

dc.contributor.authorFaria Paes, Maria do Carmo [UNESP]
dc.contributor.authorMakino, Lilian Cristina [UNESP]
dc.contributor.authorVasquez, Leonardo Avendano
dc.contributor.authorKochenborger Fernandes, Joao Batista [UNESP]
dc.contributor.authorOkada Nakaghi, Laura Satiko [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniv Nacl Colombia
dc.date.accessioned2014-05-20T13:15:47Z
dc.date.available2014-05-20T13:15:47Z
dc.date.issued2012-08-01
dc.description.abstractAstronotus ocellatus, popularly known as Oscar, is a cichlid fish from the Amazon basin (Brazil) with a great potential for fish farming. The aim of this research is to describe the morphology of eggs and larvae of A. ocellatus under stereomicroscopy and scanning electron microscopy. Eggs from natural spawnings were taken to hatcheries, collected at previously established time periods and then analysed. Oscar's eggs are demersal, adhesive and fragile to touch, with a slightly oval shape. The fertile eggs are yellowish in colour and when unfertilized are a white opaque colour. In the initial collection (IC), the majority of eggs were found to be at the gastrula phase with 30% epiboly. At 12 h after the IC, the formation of the embrionary axis and somites was observed, followed by differentiation of the tail and of the head. Fifteen hours after the IC, the emergence of the optic and otic vesicles, and of adhesive glands and the yolk pigmentation was observed. Larval hatching took place between 46 and 58 h after the first collection, at an average temperature of 27.45 +/- 2.13 degrees C. The larval stage was characterized by the development of the heart, fins, branchial apparatus, neuromasts, taste buds and adhesive glands on the head. Larval development to yolk absorption took a period of 257 h. These results provide important information for reproduction, rearing and preservation of A. ocellatus.en
dc.description.affiliationUNESP, CAUNESP, Aquaculture Ctr, BR-14884900 Jaboticabal, SP, Brazil
dc.description.affiliationUniv Nacl Colombia, Bogota, Colombia
dc.description.affiliationUnespUNESP, CAUNESP, Aquaculture Ctr, BR-14884900 Jaboticabal, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdFAPESP: 06/54048-0
dc.description.sponsorshipIdCNPq: 134265/2006-8
dc.format.extent269-276
dc.identifierhttp://dx.doi.org/10.1017/S0967199411000116
dc.identifier.citationZygote. New York: Cambridge Univ Press, v. 20, n. 3, p. 269-276, 2012.
dc.identifier.doi10.1017/S0967199411000116
dc.identifier.fileWOS000306457000008.pdf
dc.identifier.issn0967-1994
dc.identifier.lattes5806334978007732
dc.identifier.urihttp://hdl.handle.net/11449/2824
dc.identifier.wosWOS:000306457000008
dc.language.isoeng
dc.publisherCambridge University Press
dc.relation.ispartofZygote
dc.relation.ispartofjcr1.114
dc.relation.ispartofsjr0,387
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectEmbryoen
dc.subjectLarvaeen
dc.subjectMorphologyen
dc.subjectOntogenyen
dc.subjectOscaren
dc.subjectReproductionen
dc.titleEarly development of Astronotus ocellatus under stereomicroscopy and scanning electron microscopyen
dc.typeArtigo
dcterms.licensehttp://journals.cambridge.org/action/displaySpecialPage?pageId=4676#
dcterms.rightsHolderCambridge Univ Press
unesp.author.lattes5806334978007732
unesp.author.orcid0000-0002-4689-6928[1]

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