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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
16/02/2016 |
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Data da última atualização: |
16/02/2016 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
GIGLIO, E.; DELCORSO, M. C.; QUEIROZ, S. C. do N. de; ARANA, S. |
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Afiliação: |
E. GIGLIO, Unicamp; M. C. DELCORSO, Unicamp; SONIA CLAUDIA DO N DE QUEIROZ, CNPMA; S. ARANA, Unicamp. |
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Título: |
Effects of atrazine on neotropical fish kidney, Piaractus mesopotamicus: a subchronical exposition and recovery assays. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
In: INTERNATIONAL CONFERENCE ON DISEASES OF FISH AND SHELLFISH, 17., 2015, Las Palmas. Book of Abstract? Las Palmas: European Association of Fish Pathologists (EAFP), 2015. Ref. P-166. |
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Páginas: |
390 |
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Idioma: |
Inglês |
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Conteúdo: |
Environmental and human health risks that atrazine may cause justified its prohibition in European Union countries since 2005, but it is widely used in Brazil and often found above permitted levels (2.0 ?g/l-1) in river basins. The aim of this study was to evaluate the effects of atrazine by toxicity and recovery assays on trunk kidney, the main target organ of this herbicide, on Piaractus mesopotamicus (pacu) to sublethal concentration (3.57 mg / l-1) and non-lethal realistic concentration (3.0 ?g/l-1). For the exposure assay 12 pacu fingerlings were kept for 30 days in glass tanks with test concentrations presented above, including the control group (0.0 ?g/l-1). The partial replacement of atrazine occurred every 72 hours with the renovation of 1/3 of the water volume. For the recovery assay, other tanks with 12 samples by group were maintained similarly, after 30 days gradually the contaminated water was substituted by clean water and the fingerlings were maintained for another 14 days under these conditions. At the end of each assay, kidney samples were obtained and processed to histopathological and ultrastructural analysis. The kidney samples from all treatments showed Myxobolus sp. infection, which is common in Brazilian teleosts from natural environment or from fish farm, inducing degeneration of collecting tubule with massive reaction of melanomacrophages. Granulomas were also seen. The kidneys from sublethal exposition group showed also degenerative changes in proximal tubules, where no parasites or melanomacrophage reaction were identified. In nonlethal exposition group just few samples presented degenerative changes in proximal tubule cells. The recovery assay of sublethal group indicated that the degenerative alterations in proximal tubule were maintained. The recovery of nonlethal group showed no changes in proximal tubules. All groups from exposition and recovery assay presented renal tubular hyperplasia. These results indicated that the sublethal concentration of atrazine tested can induce serious damage to tubular renal function and those damages were not recovered when the fish were kept for 14 days in cleaner water and that the realistic non lethal concentration tested (found in Brazilian river basins) seems did not affect at all the function of the nephron. MenosEnvironmental and human health risks that atrazine may cause justified its prohibition in European Union countries since 2005, but it is widely used in Brazil and often found above permitted levels (2.0 ?g/l-1) in river basins. The aim of this study was to evaluate the effects of atrazine by toxicity and recovery assays on trunk kidney, the main target organ of this herbicide, on Piaractus mesopotamicus (pacu) to sublethal concentration (3.57 mg / l-1) and non-lethal realistic concentration (3.0 ?g/l-1). For the exposure assay 12 pacu fingerlings were kept for 30 days in glass tanks with test concentrations presented above, including the control group (0.0 ?g/l-1). The partial replacement of atrazine occurred every 72 hours with the renovation of 1/3 of the water volume. For the recovery assay, other tanks with 12 samples by group were maintained similarly, after 30 days gradually the contaminated water was substituted by clean water and the fingerlings were maintained for another 14 days under these conditions. At the end of each assay, kidney samples were obtained and processed to histopathological and ultrastructural analysis. The kidney samples from all treatments showed Myxobolus sp. infection, which is common in Brazilian teleosts from natural environment or from fish farm, inducing degeneration of collecting tubule with massive reaction of melanomacrophages. Granulomas were also seen. The kidneys from sublethal exposition group showed also degenerative changes in prox... Mostrar Tudo |
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Thesagro: |
Atrazina. |
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Thesaurus Nal: |
Piaractus mesopotamicus. |
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Categoria do assunto: |
W Química e Física |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/139083/1/2015RA-057.pdf
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Marc: |
LEADER 03032nam a2200181 a 4500
001 2037087
005 2016-02-16
008 2015 bl uuuu u00u1 u #d
100 1 $aGIGLIO, E.
245 $aEffects of atrazine on neotropical fish kidney, Piaractus mesopotamicus$ba subchronical exposition and recovery assays.$h[electronic resource]
260 $aIn: INTERNATIONAL CONFERENCE ON DISEASES OF FISH AND SHELLFISH, 17., 2015, Las Palmas. Book of Abstract? Las Palmas: European Association of Fish Pathologists (EAFP), 2015. Ref. P-166.$c2015
300 $a390
520 $aEnvironmental and human health risks that atrazine may cause justified its prohibition in European Union countries since 2005, but it is widely used in Brazil and often found above permitted levels (2.0 ?g/l-1) in river basins. The aim of this study was to evaluate the effects of atrazine by toxicity and recovery assays on trunk kidney, the main target organ of this herbicide, on Piaractus mesopotamicus (pacu) to sublethal concentration (3.57 mg / l-1) and non-lethal realistic concentration (3.0 ?g/l-1). For the exposure assay 12 pacu fingerlings were kept for 30 days in glass tanks with test concentrations presented above, including the control group (0.0 ?g/l-1). The partial replacement of atrazine occurred every 72 hours with the renovation of 1/3 of the water volume. For the recovery assay, other tanks with 12 samples by group were maintained similarly, after 30 days gradually the contaminated water was substituted by clean water and the fingerlings were maintained for another 14 days under these conditions. At the end of each assay, kidney samples were obtained and processed to histopathological and ultrastructural analysis. The kidney samples from all treatments showed Myxobolus sp. infection, which is common in Brazilian teleosts from natural environment or from fish farm, inducing degeneration of collecting tubule with massive reaction of melanomacrophages. Granulomas were also seen. The kidneys from sublethal exposition group showed also degenerative changes in proximal tubules, where no parasites or melanomacrophage reaction were identified. In nonlethal exposition group just few samples presented degenerative changes in proximal tubule cells. The recovery assay of sublethal group indicated that the degenerative alterations in proximal tubule were maintained. The recovery of nonlethal group showed no changes in proximal tubules. All groups from exposition and recovery assay presented renal tubular hyperplasia. These results indicated that the sublethal concentration of atrazine tested can induce serious damage to tubular renal function and those damages were not recovered when the fish were kept for 14 days in cleaner water and that the realistic non lethal concentration tested (found in Brazilian river basins) seems did not affect at all the function of the nephron.
650 $aPiaractus mesopotamicus
650 $aAtrazina
700 1 $aDELCORSO, M. C.
700 1 $aQUEIROZ, S. C. do N. de
700 1 $aARANA, S.
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Registro original: |
Embrapa Meio Ambiente (CNPMA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
08/03/2010 |
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Data da última atualização: |
15/02/2013 |
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Tipo da produção científica: |
Boletim de Pesquisa e Desenvolvimento |
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Autoria: |
RISSO, I. A. M.; GUERRA, J. G. M.; RIBEIRO, R. de L. D.; SOUZA, C. G.; ESPINDOLA, J. A. A.; POLIDORO, J. C. |
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Afiliação: |
ILZO ARTUR MOREIRA RISSO, CNPAB; JOSE GUILHERME MARINHO GUERRA, CNPAB; Raul de Lucena Duarte Ribeiro, UFRRJ; Camila Guimarães Souza, UFRRJ; JOSE ANTONIO AZEVEDO ESPINDOLA, CNPAB; JOSE CARLOS POLIDORO, CNPS. |
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Título: |
Cultivo orgânico do milho consorciado com leguminosas para fins de adubação verde. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
Seropédica: Embrapa Agrobiologia, 2009. |
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Série: |
(Embrapa Agrobiologia, Boletim de Pesquisa e Desenvolvimento, 42). |
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ISSN: |
1676-6709 |
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Idioma: |
Português |
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Conteúdo: |
O presente trabalho teve como objetivo avaliar o potencial do uso de leguminoas e milho consorciados para adubação verde no campo experimental da Embrapa Agrobiologia. O delineamento experimental foi de blocos ao acaso, num esquema de parcela subdividdia, com quatro repetições. O consórico de mucuna pruriens não reduz o desempenho do milho. Da mesma forma, o desempenho do milho não é influenciado pela utilização do arranjo espacial em linhas duplas. A introdução da leguminosas consorciadas com o milho mostra-se um prática capaz de produzir elevadas quantidades de biomassa e de acumulação de nitrogênio para adubação verde. |
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Palavras-Chave: |
Cultivo orgânico. |
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Thesagro: |
Consorciação de Cultura; Crotalária Juncea. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/76434/1/bot042-092013.pdf
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Marc: |
LEADER 01363nam a2200229 a 4500
001 1660133
005 2013-02-15
008 2009 bl uuuu u0uu1 u #d
022 $a1676-6709
100 1 $aRISSO, I. A. M.
245 $aCultivo orgânico do milho consorciado com leguminosas para fins de adubação verde.
260 $aSeropédica: Embrapa Agrobiologia$c2009
490 $a(Embrapa Agrobiologia, Boletim de Pesquisa e Desenvolvimento, 42).
520 $aO presente trabalho teve como objetivo avaliar o potencial do uso de leguminoas e milho consorciados para adubação verde no campo experimental da Embrapa Agrobiologia. O delineamento experimental foi de blocos ao acaso, num esquema de parcela subdividdia, com quatro repetições. O consórico de mucuna pruriens não reduz o desempenho do milho. Da mesma forma, o desempenho do milho não é influenciado pela utilização do arranjo espacial em linhas duplas. A introdução da leguminosas consorciadas com o milho mostra-se um prática capaz de produzir elevadas quantidades de biomassa e de acumulação de nitrogênio para adubação verde.
650 $aConsorciação de Cultura
650 $aCrotalária Juncea
653 $aCultivo orgânico
700 1 $aGUERRA, J. G. M.
700 1 $aRIBEIRO, R. de L. D.
700 1 $aSOUZA, C. G.
700 1 $aESPINDOLA, J. A. A.
700 1 $aPOLIDORO, J. C.
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Embrapa Agrobiologia (CNPAB) |
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