Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1002535
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dc.contributor.authorRIVERO-WENDT, C. L. G.pt_BR
dc.contributor.authorBORGES, A. C.pt_BR
dc.contributor.authorOLIVEIRA FILHO, E. C. dept_BR
dc.contributor.authorMIRANDA-VILELA, A. L.pt_BR
dc.contributor.authorFERREIRA, M. F. N.pt_BR
dc.contributor.authorGRISOLIA, C. K.pt_BR
dc.date.accessioned2014-12-15T11:11:11Zpt_BR
dc.date.available2014-12-15T11:11:11Zpt_BR
dc.date.created2014-12-15pt_BR
dc.date.issued2014pt_BR
dc.identifier.citationGenetics and Molecular Research, v. 13, n. 1, p. 605-615, 2014.pt_BR
dc.identifier.issn1676-5680pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1002535pt_BR
dc.description17-α-methyltestosterone (MT) is a synthetic hormone used in fish hatcheries to induce male monosex. Snails hold promise as possible test models to assess chemicals acting on the endocrine system. Biomphalaria glabrata is an aquatic gastropod mollusk (Pulmonata, Planorbidae) that can be easily maintained in aquaria, predisposing the species for use in ecotoxicological testing. This study evaluated the reproductive effects of MT on B. glabrata by examining histological changes and its reproductive performance. Ten snails per group were exposed for 4 weeks to different concentrations of MT (0.01, 0.1, and 1.0 mg/L). The total number of laid eggs, egg mass per group, size of type V oocytes, and production of spermatozoids were determined. Reproduction of B. glabrata was affected by MT. At the lowest concentration (0.01 mg/L), MT caused a statistically significant increase in the number of egg mass per snail compared with controls unexposed to MT. Histopathology analyses showed an increase in the sperm production at the higher MT concentrations of 0.1 and 1.0 mg/L. Chromatographic analyses of water samples showed that MT concentrations rapidly declined within a 96-h period. These results highlight the importance of giving more support to regulatory authorities, since MT is not registered for use on fish hatcheries in many countries around the world. Wastewater from fish farms discharged into aquatic ecosystems should be monitored for MT residues, since its presence could compromise the reproduction of other native snail species.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectHormônio sintéticopt_BR
dc.subjectPerformance reprodutivapt_BR
dc.subjectDesreguladores endócrinospt_BR
dc.titleEffects of 17α-methyltestosterone on the reproduction of the freshwater snail Biomphalaria glabrata.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2014-12-15T11:11:11Zpt_BR
dc.subject.thesagroHistopatologiapt_BR
dc.subject.thesagroBiomphalaria Glabratapt_BR
dc.subject.nalthesaurusMethyltestosteronept_BR
dc.subject.nalthesaurusReproductive performancept_BR
dc.subject.nalthesaurusEndocrine-disrupting chemicalspt_BR
dc.subject.nalthesaurusHistopathologypt_BR
dc.subject.nalthesaurusSynthetic hormonespt_BR
riaa.ainfo.id1002535pt_BR
riaa.ainfo.lastupdate2014-12-15pt_BR
dc.identifier.doihttp://dx.doi.org/10.4238/2014.January.28.6pt_BR
dc.contributor.institutionUNB; UNB; EDUARDO CYRINO DE OLIVEIRA FILHO, CPAC; UNB; UNB; UNB.pt_BR
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