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Registro Completo |
Biblioteca(s): |
Embrapa Cerrados. |
Data corrente: |
15/12/2014 |
Data da última atualização: |
15/12/2014 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
RIVERO-WENDT, C. L. G.; BORGES, A. C.; OLIVEIRA FILHO, E. C. de; MIRANDA-VILELA, A. L.; FERREIRA, M. F. N.; GRISOLIA, C. K. |
Afiliação: |
UNB; UNB; EDUARDO CYRINO DE OLIVEIRA FILHO, CPAC; UNB; UNB; UNB. |
Título: |
Effects of 17α-methyltestosterone on the reproduction of the freshwater snail Biomphalaria glabrata. |
Ano de publicação: |
2014 |
Fonte/Imprenta: |
Genetics and Molecular Research, v. 13, n. 1, p. 605-615, 2014. |
ISSN: |
1676-5680 |
DOI: |
http://dx.doi.org/10.4238/2014.January.28.6 |
Idioma: |
Inglês |
Conteúdo: |
17-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. Menos17-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 com... Mostrar Tudo |
Palavras-Chave: |
Desreguladores endócrinos; Hormônio sintético; Performance reprodutiva. |
Thesagro: |
Biomphalaria Glabrata; Histopatologia. |
Thesaurus Nal: |
Endocrine-disrupting chemicals; Histopathology; Methyltestosterone; Reproductive performance; Synthetic hormones. |
Categoria do assunto: |
S Ciências Biológicas |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/113741/1/34253.pdf
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Marc: |
LEADER 02596naa a2200325 a 4500 001 2002535 005 2014-12-15 008 2014 bl uuuu u00u1 u #d 022 $a1676-5680 024 7 $ahttp://dx.doi.org/10.4238/2014.January.28.6$2DOI 100 1 $aRIVERO-WENDT, C. L. G. 245 $aEffects of 17α-methyltestosterone on the reproduction of the freshwater snail Biomphalaria glabrata. 260 $c2014 520 $a17-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. 650 $aEndocrine-disrupting chemicals 650 $aHistopathology 650 $aMethyltestosterone 650 $aReproductive performance 650 $aSynthetic hormones 650 $aBiomphalaria Glabrata 650 $aHistopatologia 653 $aDesreguladores endócrinos 653 $aHormônio sintético 653 $aPerformance reprodutiva 700 1 $aBORGES, A. C. 700 1 $aOLIVEIRA FILHO, E. C. de 700 1 $aMIRANDA-VILELA, A. L. 700 1 $aFERREIRA, M. F. N. 700 1 $aGRISOLIA, C. K. 773 $tGenetics and Molecular Research$gv. 13, n. 1, p. 605-615, 2014.
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Registro original: |
Embrapa Cerrados (CPAC) |
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Biblioteca(s): |
Embrapa Semiárido. |
Data corrente: |
06/05/2019 |
Data da última atualização: |
29/11/2023 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
ALENCAR, S. de S.; FREIRE, J. N. T.; GOMES, R. A.; PORTO, D. D.; DANTAS, B. F. |
Afiliação: |
Sara de Souza Alencar; Jasmine Novaes Tavares Freire; Raquel Araujo Gomes; DIOGO DENARDI PORTO, CPATSA; BARBARA FRANCA DANTAS, CPATSA. |
Título: |
Impacto do aquecimento global no recrutamento dos bancos de sementes em solos da Caatinga preservada e degradada. |
Ano de publicação: |
2019 |
Fonte/Imprenta: |
In: SIMPÓSIO DO BIOMA CAATINGA, 2., 2018, Petrolina. Anais... Petrolina: Embrapa Semiárido, 2019. |
Páginas: |
p. 330. |
Série: |
(Embrapa Semiárido. Documentos, 287). |
Idioma: |
Português |
Conteúdo: |
O presente trabalho tem como objetivo avaliar a emergência de plântulas em solos de área preservada (AP) e área degradada (AD) da Caatinga, em temperatura atual e futura. |
Palavras-Chave: |
Emergência de plântulas. |
Thesagro: |
Caatinga; Mudança Climática; Semente. |
Thesaurus NAL: |
Climate change; Seeds. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/197182/1/Barbara-7.pdf
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Marc: |
LEADER 00995nam a2200253 a 4500 001 2108753 005 2023-11-29 008 2019 bl uuuu u00u1 u #d 100 1 $aALENCAR, S. de S. 245 $aImpacto do aquecimento global no recrutamento dos bancos de sementes em solos da Caatinga preservada e degradada.$h[electronic resource] 260 $aIn: SIMPÓSIO DO BIOMA CAATINGA, 2., 2018, Petrolina. Anais... Petrolina: Embrapa Semiárido$c2019 300 $ap. 330. 490 $a(Embrapa Semiárido. Documentos, 287). 520 $aO presente trabalho tem como objetivo avaliar a emergência de plântulas em solos de área preservada (AP) e área degradada (AD) da Caatinga, em temperatura atual e futura. 650 $aClimate change 650 $aSeeds 650 $aCaatinga 650 $aMudança Climática 650 $aSemente 653 $aEmergência de plântulas 700 1 $aFREIRE, J. N. T. 700 1 $aGOMES, R. A. 700 1 $aPORTO, D. D. 700 1 $aDANTAS, B. F.
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