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| Registros recuperados: 154 | |
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| Bancon-montigny, Chrystelle; Gonzalez, Catherine; Delpoux, Sophie; Avenzac, Muriel; Spinelli, Sylvie; Mhadhbi, Takoua; Mejri, Kaouther; Hlaili, Asma Sakka; Pringault, Olivier. |
| The potential of remobilization of pollutants is a major problem for anthropogenic ecosystems, because even when the anthropogenic source of pollution is identified and removed, pollutants stored in sediments can be released into the water column and impact pelagic communities during sediment resuspension provoked by dredging, storms or bottom trawling. The objectives of the present study were to assess the changes observed in the chemical composition of the water column following resuspension of a polluted marine sediment and the consequences for the chemical composition of adjacent marine waters according to season. For that purpose, an experimental sediment resuspension protocol was performed on four distinct occasions, spring, summer, fall and winter,... |
| Tipo: Text |
Palavras-chave: Lagoon; Offshore; Trace metal elements; Pesticides; PAHs; Enrichment factor; Elutriate. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00505/61620/65644.pdf |
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| Moreau, Pierrick. |
| The thesis work is part of the very current issue on mass mortality outbreaks affecting Pacific oyster, C. gigas, spat and juveniles and questions about the involvement of pesticides in this phenomenon. The first part of this thesis was devoted to study the effects of pesticides on hemocyte parameters in the Pacific oyster (in vitro and in vivo). The immunomodulator effect of selected pesticides (alone or in mixture) has been explored principally through flow cytometry. The second part concerned the study of the effects of a pesticides mixture on OsHV-1 itself. No direct effects have been reported on the viral particles in presence of the pollutants. Moreover, pesticide effects on Pacific oysters were also explored through experimental pathology assays... |
| Tipo: Text |
Palavras-chave: Pacific oyster; Pesticides; OsHV-1; Autophagy; Immunity; Hemocyte; Pathology. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00226/33740/32149.pdf |
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| Akcha, Farida; Spagnol, Charlene; Rouxel, Julien. |
| We investigated the effects of genotoxicant exposure in gametes and embryos to find a possible link between genotoxicity and reproduction/developmental impairment, and explore the impact of chemical genotoxicity on population dynamics. Our study focused on the genotoxic effects of two herbicides on oyster gametes and embryos: glyphosate (both as an active substance and in the Roundup formulation) and diuron. France is Europe's leading consumer of agrochemical substances and as such, contamination of France's coastal waters by pesticides is a major concern. Glyphosate and diuron are among the most frequently detected herbicides in oyster production areas; as oyster is a specie with external reproduction, its gametes and embryos are in direct contact with... |
| Tipo: Text |
Palavras-chave: Genotoxicity; Embryotoxicity; Oyster; Gametes; Pesticides; Diuron; Glyphosate. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00070/18128/15783.pdf |
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| Gagnaire, Beatrice; Renault, Tristan; Thomas Guyon, Hélène; Burgeot, Thierry. |
| Bay of Marennes-Oleron is an important French area of reproduction for sea bass, Dicentrarchus labrax. This area is often subjected to many pollutions due to anthropic activities, including pesticides and polycyclic aromatic hydrocarbons (PAH) which cause adverse effects in aquatic organisms. The harmful effects of such contaminants on fish immune system leading to a decreased resistance against pathogens begin to be described, but remain poorly known. In this context, influence of micropolluants, like PAH, on the defense mechanisms developed by sea bass was tested. Fish were exposed five days to a soluble fraction of PAH with environmental concentration (760 ng/L). At the end of the contamination, fish were transferred to non contaminated sea water and... |
| Tipo: Text |
Palavras-chave: Phagocytosis; Vibrio; Pesticides; Pollutant; Crasssotrea gigas; Oysters. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/acte-3317.pdf |
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| Portier, R; Meyers, S. |
| The environmental effect and fate of several agricultural and industrial source toxicants were evaluated in controlled laboratory microcosm systems in the presence of the aminopolysaccharide polymer, chitin. Toxicants examined included methyl parathion, phenol, pentachlorophenol, 2,4 dichlorophenol, 1,2 dichloroethane and Kepone. Microcosm operating parameters, including pH/Eh, salinity, temperature, flow rate and sediment/water interface conditions, were based on comparable in situ measurements. Fate analysis predictions were based on mineralization of the parent toxicant compound as measured by chromatographic analysis or super(14)CO sub(2) expiration. Chitin, amended to continuous flow microcosms, promoted either cometabolic or cooxidative... |
| Tipo: Text |
Palavras-chave: Controlled conditions; Chemical pollutants; Industrial wastes; Pesticides; Metabolism; Food webs; Biodegradation; Ecosystems; Microorganisms; Environmental effects; Brackishwater pollution; Estuaries; Toxicants; Chitin. |
| Ano: 1984 |
URL: http://archimer.ifremer.fr/doc/1984/acte-1011.pdf |
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| Gamain, Perrine; Feurtet-mazel, Agnes; Maury-brachet, Regine; Auby, Isabelle; Pierron, Fabien; Belles, Angel; Budzinski, Helene; Daffe, Guillemine; Gonzalez, Patrice. |
| Dwarf eelgrasses (Zostera noltei) populations have decreased since 2005 in Arcachon Bay (southwest France). Various stressors have been pointed out, however the role of xenobiotics like pesticides or copper (Cu) and of parameters like water temperature warming have not yet been explored. To determine their impact, Z. noltei individuals were collected in a pollution-free site and transferred to the laboratory in seawater microcosms. This dwarf eelgrass was exposed to a pesticide cocktail and copper, alone or simultaneously, at temperatures (10 °C, 20 °C, 28 °C) representative of different seasons. After a two-week contamination, leaf growth, leaf bioaccumulation of Cu, and differential expression of target genes were studied. Eelgrasses bioaccumulated Cu... |
| Tipo: Text |
Palavras-chave: Zostera noltei; Arcachon Bay; Pesticides; Copper; Cellular impacts. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00407/51831/58536.pdf |
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| Fauvelle, Vincent; Belles, Angel; Budzinski, Helene; Mazzella, Nicolas; Plus, Martin. |
| The work presented here aims at comparing monitoring of S-metolachlor, the major pesticide in use in the Arcachon Bay (South West of France, transitional coastal area), by chemical analysis (monthly passive sampling) and contaminant dissipation modeling from sources (Mars-2D model). The global strategy consisted in i) identifying the major sources of S-metolachlor to the Bay, ii) monitoring these sources for 12 months, and iii) comparing modeled data in the Bay based on measured inputs, to chemical measurements made inside the Bay along with the 12-month source monitoring. Results first showed that the major S-metolachlor surface inputs to the Arcachon Bay are mainly from one single source. Modeled and measured data were in good agreement at 5 sites in the... |
| Tipo: Text |
Palavras-chave: Passive sampling; POCIS; Mars-2D; Contaminant; Monitoring; Coastal area; Pesticides; S-metolachlor. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00445/55627/57334.pdf |
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| Menet-nedelec, Florence; Halm-lemeille, Marie-pierre; Maheux, Frank; Pierre-duplessix, Olivier; Simon, Benjamin; Gonzalez, Jean-louis; Repecaud, Michel; Facq, Jean-valery. |
| L’étude ECUME était une opération destinée à tester localement dans les eaux côtières du littoral normand, des outils développés nationalement lors de nombreux travaux, et pressentis pour être utilisés lors des prochaines campagnes d’évaluation de la qualité chimique des masses d’eau littorales pour la DCE. Ceci afin de déterminer la méthode la plus adaptée et opérationnelle de les déployer, et comparer leurs résultats entre eux et par rapport aux connaissances actuelles des niveaux de contamination. Trois sites ont été choisis : Chausey, baie des Veys et estuaire de Seine. Les résultats des analyses chimiques dans l’eau de mer grâce aux DGT, POCIS, SBSE, et dans les moules ont permis de confirmer le contraste du niveau de contamination en éléments traces... |
| Tipo: Text |
Palavras-chave: Contamination chimique; Chausey; Baie des Veys; Estuaire de Seine; DGT; POCIS; SBSE; Biomarqueurs; Stabilité lysosomale; Micronoyaux; Activité catalase; Métaux; Pesticides; Substances pharmaceutiques; HAP; PCB; Phtalates; Alkylphénols. |
| Ano: 2018 |
URL: http://archimer.ifremer.fr/doc/00434/54582/55966.pdf |
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| Moreau, Pierrick; Burgeot, Thierry; Renault, Tristan. |
| Pesticides are frequently detected in estuaries among the pollutants found in estuarine and coastal areas and may have major ecological consequences. They could endanger organism growth, reproduction or survival. In the context of high mortality outbreaks affecting Pacific oysters, Crassostrea gigas, in France since 2008, it appears of importance to determine the putative effects of pesticides on oyster susceptibility to infectious agents. Massive mortality outbreaks reported in this species, mainly in spring and summer, may suggest an important role played by the seasonal use of pesticides and freshwater input in estuarine areas where oyster farms are frequently located. To understand the impact of some pesticides detected in French waters, their effects... |
| Tipo: Text |
Palavras-chave: Immunity; Hemocytes; Pesticides; Pacific oyster; Crassostrea gigas; Flow cytometry; Bivalve. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00144/25555/23700.pdf |
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| Forget, Joelle; Beliaeff, Benoit; Bocquene, Gilles. |
| From April 1997 to June 1998, 14 measurements of acetylcholinesterase (AChE) enzymatic activity were performed with the copepod, Tigriopus brevicornis, collected at five stations in the Vilaine River estuary (South Brittany, France). Simultaneously, four chemical analyses of triazines and one analysis of total pesticides in water were undertaken. AChE activity levels in T brevicornis were compared to the levels measured at a reference site not exposed to effluents from Vilaine River. Results reveal significant differences between AChE activity levels depending on location of stations in the plume of the river with an increasing gradient of activity from the upstream to the downstream stations, thus indicating that neurotoxic contaminants are mainly brought... |
| Tipo: Text |
Palavras-chave: Monitoring; Estuary; Pollution; Pesticides; Tigriopus brevicornis; Acetylcholinesterase activity. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/2003/publication-737.pdf |
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| Mañas,F; Peralta,L; Ugnia,L; Weyers,A; García Ovando,H; Gorla,N. |
| Excessive amounts of the herbicide glyphosate are incorporated daily to the soil and the ecosystems. AMPA is its major environmental breakdown product. In this study we determined the levels of thiobarbituric acid reactive substances (TBARs); quantified superoxide dismutase (SOD) and catalase (CAT) activity in liver, kidney, lung and heart, and performed the comet assay in blood and liver of mice administered glyphosate (40 or 400 mg/kg/day) or AMPA (100 mg/kg/day) in drinking water for 14 days. Exposure to glyphosate 400 mg/kg induced a statistically significant (p <0.05) decrease of SOD activity in heart and an increase in CAT activity in kidney. In the comet assay there were statistically significant differences in all the treatments and tissues... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pesticides; Mice; Genotoxicity. |
| Ano: 2013 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1852-62332013000300007 |
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| Diez,M.C. |
| Worldwide use of pesticide has increased dramatically during the last two decades. As a consequence, pesticide residues and their transformation products are frequently found in groundwater and surface waters. This review summarizes information about polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), some chlorophenols; it mainly empathizes on pesticides, their incorporation into the environment, microorganisms involved in their degradation and, some physico-chemical aspects of pesticides behavior in soils. Details about residues of pesticides in groundwater and superficial water found in some foreign countries and in Chile are reported, as well. The fungal degradation of organic pollutants (xenobiotics) is considered as an... |
| Tipo: Journal article |
Palavras-chave: Biodegradation; White-rot fungi; Pesticides; Biobeds. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162010000100004 |
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| Loro,Vania Lucia; Murussi,Camila; Menezes,Charlene; Leitemperger,Jossiele; Severo,Eduardo; Guerra,Luciana; Costa,Maiara; Perazzo,Giselle Xavier; Zanella,Renato. |
| Due to intense agricultural activity in the rio Uruguai (South Brazil), there is the potential for aquatic contamination by agrochemicals. In this region, there are many reservoirs to meet the water demand for rice fields, forming lentic environments. In line with this information, the aim of this study was to show a comparative analysis of some biomarkers, such as lipid peroxidation (TBARS), gluthatione S-transferase (GST), non-protein thiols (NPSH), amino acids (AA) and piscine micronucleus tests (MNE) in Astyanax jacuhiensis from lentic and lotic environments in the middle rio Uruguai region, comparing warm and cold seasons. Eight pesticides were found in water samples, with propoxur having the highest concentration found in both environments and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomonitoring; Lotic and lentic environments; Pampa; Pesticides. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000300569 |
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| Arencibia, G.; Capetillo, N.; Castro, M.; Ortega, A.. |
| Las redes de estaciones de monitoreo o muestreos empleadas en estudios ambientales dentro de amplios ecosistemas marinos, como extensas bahías de bolsa, ocasionan enormes gastos económicos y de tiempo en las campañas de muestreo, además de imprecisiones estadísticas que no las hacen representativas. En este trabajo se emplean una serie de criterios que dan basamento para la recomendación de una nueva red de estaciones a partir de estudios previos de metales pesados, hidrocarburos, pesticidas y del bentos, los cuales permiten elaborar una red de monitoreo óptima. Se tuvieron en cuenta criterios diferentes y pruebas estadísticas de análisis multivariado. La red propuesta para estudios de indicadores biológicos del bentos y contaminantes en sedimentos queda... |
| Tipo: Journal Contribution |
Palavras-chave: Multivariate analysis; Sediments; Benthos; Heavy metals; Hydrocarbon analysis; Pesticides. |
| Ano: 2011 |
URL: http://hdl.handle.net/1834/4649 |
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| Madadi, O.V; Wandiga, S. O; Jumba, I. O.. |
| The use of most organochlorine pesticides has been banned or restricted in the republic of Kenya under the Rotterdam and Stockholm convention due to high levels of persistence in the environment and toxicity to nontarget organisms. Studies conducted in some parts of the country have revealed that residue levels of these compounds are still in the environment. However, the residues of these compounds have not been exhaustively studied in the Lake Victoria catchment area. This study was set to investigate the residues levels of p,p-DDT, o,p’- DDE, p,p-DDD, g-HCH, D-HCH, a-HCH, Aldrin, and Dieldrin, in water samples from Lake Victoria catchment. Samples were collected during the short rain, dry and wet seasons and analysed using gas chromatography equipped... |
| Tipo: Proceedings Paper |
Palavras-chave: Pollutants; Catchment area; Pesticides; Chemical pollutants; Toxicity; Freshwater lakes; Pollution effects; Environmental impact; Inland water environment; Pollutant persistence. |
| Ano: 2006 |
URL: http://hdl.handle.net/1834/1475 |
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| Registros recuperados: 154 | |
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