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Registro Completo |
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Biblioteca(s): |
Embrapa Tabuleiros Costeiros. |
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Data corrente: |
10/12/2014 |
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Data da última atualização: |
10/12/2014 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
CASTRO, M. P.; MORAES, F. R. de; FUJIMOTO, R. Y.; CRUZ, C. da; BELO, M. A. de A.; MORAES, J. R. E. de. |
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Afiliação: |
RODRIGO YUDI FUJIMOTO, CPATC. |
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Título: |
Acute Toxicity by Water Containing Hexavalent or Trivalent Chromium in Native Brazilian Fish, Piaractus mesopotamicus: Anatomopathological Alterations and Mortality. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Bulletin of Environmental Contamination and Toxicology, California, v. 92, p. 213-219, 2014. |
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DOI: |
10.1007/s00128-013-1174-5 |
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Idioma: |
Inglês |
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Conteúdo: |
This study evaluated the toxicity of hexavalent and trivalent compounds of chromium to the pacu, Piaractus mesopotamicus, in acute exposures of 96 h through mortality and histopathological responses. Hexavalent otassium dichromate was more toxic than trivalent compounds of chromium chloride, chromium oxide and chromium carbochelate. Sufficient mortalities occurred only with potassium dichromate to yield an LC50 value at 124.2 mg L-1. Hexavalent chromium caused reversible and irreversible lesions, which may affect organ functionality. Histopathological evaluation showed that trivalent chromium caused lesions of lower severity. Pacu subjected to different concentrations of chromium carbochelate showed no histopathological changes in the kidneys, liver, skin and gills, being similar to those of the control fish. Among the three sources of Cr3?, only chromium chloride at 200 mg L-1 resulted in mortality, which reached 100 % within the first 18 h. These findings confirm that trivalent chromium, when administered within recommended levels, may be used safely in aquaculture. |
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Thesaurus Nal: |
chromium; histopathology; Piaractus mesopotamicus; toxicity. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/113507/1/art-10.1007-s00128-013-1174-5-buletim-contamination.pdf
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Marc: |
LEADER 01919naa a2200241 a 4500
001 2002178
005 2014-12-10
008 2014 bl uuuu u00u1 u #d
024 7 $a10.1007/s00128-013-1174-5$2DOI
100 1 $aCASTRO, M. P.
245 $aAcute Toxicity by Water Containing Hexavalent or Trivalent Chromium in Native Brazilian Fish, Piaractus mesopotamicus$bAnatomopathological Alterations and Mortality.$h[electronic resource]
260 $c2014
520 $aThis study evaluated the toxicity of hexavalent and trivalent compounds of chromium to the pacu, Piaractus mesopotamicus, in acute exposures of 96 h through mortality and histopathological responses. Hexavalent otassium dichromate was more toxic than trivalent compounds of chromium chloride, chromium oxide and chromium carbochelate. Sufficient mortalities occurred only with potassium dichromate to yield an LC50 value at 124.2 mg L-1. Hexavalent chromium caused reversible and irreversible lesions, which may affect organ functionality. Histopathological evaluation showed that trivalent chromium caused lesions of lower severity. Pacu subjected to different concentrations of chromium carbochelate showed no histopathological changes in the kidneys, liver, skin and gills, being similar to those of the control fish. Among the three sources of Cr3?, only chromium chloride at 200 mg L-1 resulted in mortality, which reached 100 % within the first 18 h. These findings confirm that trivalent chromium, when administered within recommended levels, may be used safely in aquaculture.
650 $achromium
650 $ahistopathology
650 $aPiaractus mesopotamicus
650 $atoxicity
700 1 $aMORAES, F. R. de
700 1 $aFUJIMOTO, R. Y.
700 1 $aCRUZ, C. da
700 1 $aBELO, M. A. de A.
700 1 $aMORAES, J. R. E. de
773 $tBulletin of Environmental Contamination and Toxicology, California$gv. 92, p. 213-219, 2014.
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Registro original: |
Embrapa Tabuleiros Costeiros (CPATC) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Leite. Para informações adicionais entre em contato com cnpgl.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
10/11/2022 |
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Data da última atualização: |
12/12/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
FILGUEIRAS, M. D. G.; MATOS, R. S.; BARRETO, L. P.; MASCARIN, G. M.; RIZZO, P. V.; FREITAS, F. M. C.; PRATA, M. C. de A.; MONTEIRO, C.; FERNANDES, E. K. K. |
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Afiliação: |
MARCOS DANIEL GOMES FILGUEIRAS, Universidade Federal de Goiás; RENATA SILVA MATOS; LUCAS PRADO BARRETO, Universidade Federal de Goiás; GABRIEL MOURA MASCARIN, CNPMA; PRICILA VETRANO RIZZO, CNPGL; FERNANDA MARA CUNHA FREITAS, CNPGL; MARCIA CRISTINA DE AZEVEDO PRATA, CNPGL; CAIO MONTEIRO, Universidade Federal de Goiás; ÉVERTON KORT KAMP FERNANDES, Universidade Federal de Goiás. |
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Título: |
From the laboratory to the field: efficacy of entomopathogenic nematodes to control the cattle tick. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Pest Management Science, v. 79, n. 1, p. 216-225, 2023. |
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DOI: |
http://doi.org/10.1002/ps.7190 |
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Idioma: |
Inglês |
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Conteúdo: |
BACKGROUND - The control of ticks is challenged by the resistance of tick populations to chemical acaricides. In this study, we evaluated, under laboratory conditions, the efficacy of Heterorhabditis bacteriophora against Rhipicephalus (Boophilus) microplus engorged females with varying body weights (150, 200, 250, 300 or 350 mg per female) or from eight different geographical populations. We also determined the efficacy of H. bacteriophora for tick control under field conditions. RESULTS - R. microplus engorged females with varying body weights exposed to 150 juveniles of H. bacteriophora resulted in a high control efficacy (97.5% to 98.4%). Tests with females from different geographical populations comprised eight tick strains treated with H. bacteriophora and their respective control groups. The biological parameters of females exposed to nematode treatments did not differ significantly and resulted in 89% to 99% of control efficacy. Trials conducted under field conditions were performed in field plots with Megathyrsus maximus grass. Treatment groups received eight cadavers of Tenebrio molitor fully colonized with H. bacteriophora at 1 week prior to the release of female ticks, whereas control groups were untreated. On the first day of the experiment, six engorged females were distributed in each plot. On day 42 and day 63, the apical portion of the grasses with R. microplus larvae were collected and quantified. The population of R. microplus larvae was reduced up to 73.1% in plots treated with H. bacteriophora at day 63 after treatment. CONCLUSION - R. microplus engorged females with varying body weights or from different geographical populations were highly susceptible to H. bacteriophora. The field test demonstrated the efficacy of H. bacteriophora in reducing R. microplus larvae in infested pastures. MenosBACKGROUND - The control of ticks is challenged by the resistance of tick populations to chemical acaricides. In this study, we evaluated, under laboratory conditions, the efficacy of Heterorhabditis bacteriophora against Rhipicephalus (Boophilus) microplus engorged females with varying body weights (150, 200, 250, 300 or 350 mg per female) or from eight different geographical populations. We also determined the efficacy of H. bacteriophora for tick control under field conditions. RESULTS - R. microplus engorged females with varying body weights exposed to 150 juveniles of H. bacteriophora resulted in a high control efficacy (97.5% to 98.4%). Tests with females from different geographical populations comprised eight tick strains treated with H. bacteriophora and their respective control groups. The biological parameters of females exposed to nematode treatments did not differ significantly and resulted in 89% to 99% of control efficacy. Trials conducted under field conditions were performed in field plots with Megathyrsus maximus grass. Treatment groups received eight cadavers of Tenebrio molitor fully colonized with H. bacteriophora at 1 week prior to the release of female ticks, whereas control groups were untreated. On the first day of the experiment, six engorged females were distributed in each plot. On day 42 and day 63, the apical portion of the grasses with R. microplus larvae were collected and quantified. The population of R. microplus larvae was reduced up to 73.1... Mostrar Tudo |
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Palavras-Chave: |
Ensaio de campo; Field assays. |
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Thesagro: |
Bovino; Carrapato; Controle Biológico; Nematóide. |
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Thesaurus NAL: |
Biological control; Heterorhabditis bacteriophora; Rhipicephalus microplus. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02848naa a2200337 a 4500
001 2148178
005 2022-12-12
008 2023 bl uuuu u00u1 u #d
024 7 $ahttp://doi.org/10.1002/ps.7190$2DOI
100 1 $aFILGUEIRAS, M. D. G.
245 $aFrom the laboratory to the field$befficacy of entomopathogenic nematodes to control the cattle tick.$h[electronic resource]
260 $c2023
520 $aBACKGROUND - The control of ticks is challenged by the resistance of tick populations to chemical acaricides. In this study, we evaluated, under laboratory conditions, the efficacy of Heterorhabditis bacteriophora against Rhipicephalus (Boophilus) microplus engorged females with varying body weights (150, 200, 250, 300 or 350 mg per female) or from eight different geographical populations. We also determined the efficacy of H. bacteriophora for tick control under field conditions. RESULTS - R. microplus engorged females with varying body weights exposed to 150 juveniles of H. bacteriophora resulted in a high control efficacy (97.5% to 98.4%). Tests with females from different geographical populations comprised eight tick strains treated with H. bacteriophora and their respective control groups. The biological parameters of females exposed to nematode treatments did not differ significantly and resulted in 89% to 99% of control efficacy. Trials conducted under field conditions were performed in field plots with Megathyrsus maximus grass. Treatment groups received eight cadavers of Tenebrio molitor fully colonized with H. bacteriophora at 1 week prior to the release of female ticks, whereas control groups were untreated. On the first day of the experiment, six engorged females were distributed in each plot. On day 42 and day 63, the apical portion of the grasses with R. microplus larvae were collected and quantified. The population of R. microplus larvae was reduced up to 73.1% in plots treated with H. bacteriophora at day 63 after treatment. CONCLUSION - R. microplus engorged females with varying body weights or from different geographical populations were highly susceptible to H. bacteriophora. The field test demonstrated the efficacy of H. bacteriophora in reducing R. microplus larvae in infested pastures.
650 $aBiological control
650 $aHeterorhabditis bacteriophora
650 $aRhipicephalus microplus
650 $aBovino
650 $aCarrapato
650 $aControle Biológico
650 $aNematóide
653 $aEnsaio de campo
653 $aField assays
700 1 $aMATOS, R. S.
700 1 $aBARRETO, L. P.
700 1 $aMASCARIN, G. M.
700 1 $aRIZZO, P. V.
700 1 $aFREITAS, F. M. C.
700 1 $aPRATA, M. C. de A.
700 1 $aMONTEIRO, C.
700 1 $aFERNANDES, E. K. K.
773 $tPest Management Science$gv. 79, n. 1, p. 216-225, 2023.
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Embrapa Gado de Leite (CNPGL) |
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