Female germ cell renewal during the annual reproductive cycle in Ostariophysians fish

dc.creatorWildner, DD
dc.creatorGrier, H
dc.creatorQuagio-Grassiotto, I
dc.date2013
dc.date36951
dc.date2014-07-30T17:34:45Z
dc.date2015-11-26T17:04:02Z
dc.date2014-07-30T17:34:45Z
dc.date2015-11-26T17:04:02Z
dc.date.accessioned2018-03-28T23:52:15Z
dc.date.available2018-03-28T23:52:15Z
dc.identifierTheriogenology. Elsevier Science Inc, v. 79, n. 4, n. 709, n. 724, 2013.
dc.identifier0093-691X
dc.identifierWOS:000315017500019
dc.identifier10.1016/j.theriogenology.2012.11.028
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/66848
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/66848
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1279250
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionThe objective was to characterize female germ cell renewal during the annual reproductive cycle in two species of ostariophysian fish with distinct reproductive strategies: a siluri-form, Pimelodus maculatus, in which oocyte development is group synchronous and the annual reproductive period is short; and a characiform, Serrasalmus maculatus, with asynchronous oocyte development and a prolonged reproductive period. These reproductive strategies result in fish determinate and indeterminate fecundity, respectively. Annual reproductive phases were determined by biometric and histologic analysis of gonads and interpreted according to new proposals for phase classification and stages of oocyte development (with special attention to germinal epithelium activity). Histologically, there were two types of oogonia in the germinal epithelium: single oogonia and those in mitotic proliferation. Oogonial proliferation and their entry into meiosis resulted in formation of cell nests (clusters of cells in the ovarian lamellae). Morphometric analysis was used to estimate germ cell renewal. Based on numbers of single oogonia in the lamellar epithelium, and nests with proliferating oogonia or early prophase oocytes throughout the annual reproductive cycle, oogonial proliferation and entrance into meiosis were more intense during the regenerating phase and developing phase, but decreased sharply (P < 0.05) during the spawning-capable phase. Oogonial proliferation gradually recovered during the regressing phase. We concluded that, independent of species or features of the reproductive cycle, germ cell renewal occurred during the regenerating phase, ensuring availability of eggs for the spawning event. (c) 2013 Elsevier Inc. All rights reserved.
dc.description79
dc.description4
dc.description709
dc.description724
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.languageen
dc.publisherElsevier Science Inc
dc.publisherNew York
dc.publisherEUA
dc.relationTheriogenology
dc.relationTheriogenology
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectReproductive phase
dc.subjectReproductive cycle
dc.subjectCell renewal
dc.subjectOogonia
dc.subjectEarly prophase oocyte
dc.subjectStem-cells
dc.subjectOocyte Development
dc.subjectCysts
dc.subjectEpithelium
dc.subjectTeleostei
dc.subjectFollicle
dc.subjectMaturity
dc.subjectMedaka
dc.titleFemale germ cell renewal during the annual reproductive cycle in Ostariophysians fish
dc.typeArtículos de revistas


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