The use of mGnRHa provokes ovulation but not viable embryos in Leporinus macrocephalus

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dc.contributor.authorPereira, T. S.B. [UNESP]
dc.contributor.authorBoscolo, C. N.P. [UNESP]
dc.contributor.authorMoreira, R. G.
dc.contributor.authorBatlouni, S. R. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2018-12-11T17:04:46Z
dc.date.available2018-12-11T17:04:46Z
dc.date.issued2017-04-01
dc.description.abstractIn rheophilic tropical fish, the use of carp pituitary extract (CPE) is still the main protocol since the use of gonadotropin-releasing hormone (GnRH) induces ovulation, but usually does not provide viable embryos. Thus, in order to generate knowledge to support the establishment of a successful protocol using GnRH, we compared the ovulatory process and reproductive performance of Leporinus macrocephalus using CPE (0.5 and 5.0 mg kg−1) and mGnRHa (7 µg kg−1) associated with metoclopramide. Females of both treatments ovulated, but the mGnRHa treatment did not provide viable embryos, which was associated with a more potent ovulation, lower latency period and less intense hydration of eggs, suggesting a possible treatment overstimulation. This is the first report associating a less intense egg hydration process to a failure in obtaining viable eggs in induced fish spawning. Considering that the mGnRHa doses applied here were quite low, it is possible that L. macrocephalus as well as other rheophilic tropical species present a higher sensibility to mGnRHa and/or metoclopramide (or derived substances) and future approaches must consider using even lower doses of these substances as well as testing different types of GnRH and dopamine inhibitors.en
dc.description.affiliationCentro de Aquicultura Universidade Estadual Paulista (UNESP), Campus de Jaboticabal
dc.description.affiliationInstituto de Biociências Universidade de São Paulo (USP), Campus de São Paulo
dc.description.affiliationUnespCentro de Aquicultura Universidade Estadual Paulista (UNESP), Campus de Jaboticabal
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de Goiás
dc.description.sponsorshipIdFundação de Amparo à Pesquisa do Estado de Goiás: 2010/08334-7
dc.format.extent515-529
dc.identifierhttp://dx.doi.org/10.1007/s10499-016-0049-2
dc.identifier.citationAquaculture International, v. 25, n. 2, p. 515-529, 2017.
dc.identifier.doi10.1007/s10499-016-0049-2
dc.identifier.file2-s2.0-84982171349.pdf
dc.identifier.issn1573-143X
dc.identifier.issn0967-6120
dc.identifier.scopus2-s2.0-84982171349
dc.identifier.urihttp://hdl.handle.net/11449/173346
dc.language.isoeng
dc.relation.ispartofAquaculture International
dc.relation.ispartofsjr0,591
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectFinal maturation
dc.subjectGonadal steroids
dc.subjectHormonal treatment
dc.subjectOvulation
dc.subjectSpawning performance
dc.titleThe use of mGnRHa provokes ovulation but not viable embryos in Leporinus macrocephalusen
dc.typeArtigo
unesp.author.orcid0000-0003-3579-2530[4]

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