SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Influence of Crassostrea gigas (Thunberg) sexual maturation stage and ploidy on uptake of paralytic phycotoxins

Grizel, Henri; Michel, Pierre; Abarnou, Alain; Guegan, B..

Oyster contamination present on Oyster-beds in Abers-Morlaix bay when stranding arrives, decontamination of this oysters in others clean rivers an clean oyster stocks in oyster-beds, submersible and insubmersible thanks in pollute rivers are described. Pratical implication of this result in given.

Tipo: Text

Palavras-chave: Amoco Cadiz; Croissance; Mortalités; Décontamination; Marée noire; Contamination; Pollution; Huîtres.

Ano: 1979

URL: http://archimer.ifremer.fr/doc/1979/acte-6247.PDF

Influence of effluents from a Wastewater Treatment Plant on nutrient distribution in a coastal creek from southern Brazil

Gueguen, Marielle; Baron, Regis; Bardouil, Michele; Haberkorn, Hansy; Soudant, Philippe; Truquet, Philippe; Lassus, Patrick.

The purpose of this study was to assess paralytic phycotoxin uptake in diploid and triploid oysters at two stages of their sexual cycle corresponding to their status in early summer (June) and winter (November). Samples of diploid and triploid oysters were exposed to a toxic culture of Alexandrium minutum for 4 days in each season. No significant differences in filtration or clearance rates were observed during either November or June experiments. When diploid oysters were at resting stage (November), toxin uptake showed no significant difference between the ploidy classes. In contrast, when the diploid oysters were at the peak of their sexual maturation (June), the triploid oysters were seen to accumulate almost double the amount of paralytic toxins as...

Tipo: Text

Palavras-chave: Paralytic shellfish poisoning; Crassostrea gigas; Diploid; Triploid; Contamination.

Ano: 2012

URL: http://archimer.ifremer.fr/doc/00087/19796/17487.pdf

BABT

Santos,Isaac Rodrigues; Costa,Ronaldo Cataldo; Freitas,Ubiratan; Fillmann,Gilberto.

The hypothesis that effluents treated through activated sludge process cause changes in nutrient biogeochemistry of receiving water bodies was investigated in Vieira creek, southern Brazil. Dissolved oxygen, suspended matter, and pH did not vary among the sampling stations. Nutrient, biochemical oxygen demand, and conductivity values were significantly higher downstream from the Wastewater Treatment Plant (WWTP) effluents. Further downstream, nitrate concentrations were higher due to ammonium nitrification, organic matter remineralization and/or the occurrence of unidentified sources. Per capita nutrient emission factors were estimated to be 0.16 kg P.yr-1 and 4.14 kg N.yr-1. Under pristine conditions, low N:P ratios were observed, which were significantly...

Interacción simbiótica Rhizobium-leguminosas arbóreas en sistemas contaminados con hidrocarburos policíclicos aromáticos.

Palavras-chave: Activated sludge; Nutrients; Contamination; Coastal zone; Biogeochemistry; Eutrophication.

Ano: 2008

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000100019

Isolation of Mucorales from processed maize (Zea mays L.) and screening for protease activity

López Ortiz, Carlos.

En este estudio se evaluó el establecimiento de la simbiosis entre Rhizobium tropici CIAT899 y las leguminosas arbóreas Leucaena leucocephala (Lam.) y Acaciella angustissima (Mill.) en sistemas contaminados con naftaleno (NAF) y fenantreno (FEN), y contempló dos fases experimentales. En la primera fase se evaluó el efecto de NAF y FEN en la dinámica de formación de nódulos, así como la respuesta de la planta en el contenido de compuestos fenólicos totales, actividad antioxidante total y contenido total de clorofilas y carotenos. En la segunda fase se evaluó la degradación de 60 mg FEN kg-1 de arena, así como la actividad de la enzima nitrogenasa en las rizosfera de las plantas. La contaminación con NAF y/o FEN tuvo efectos tóxicos para la formación de...

Palavras-chave: Nódulo; HPA's; Compuestos fenólicos; Contaminación; Nodule; Phenolic compounds; Contamination; Maestría; Edafología.

Ano: 2011

URL: http://hdl.handle.net/10521/379

BJM

Santiago,André Luiz Cabral Monteiro de Azevedo; Motta,Cristina Maria de Souza.

Mucoraleswere isolated from maize flour, corn meal and cooked cornflakes using surface and depth plate methods. Rhizopus oryzae, Circinella muscae, Mucor subtilissimus,Mucor hiemalis f. hiemalis, Syncephalastrum racemosum, Rhizopus microsporus var. chinensis and Absidia cylindrospora showed protease activity.

La qualité marchande des moules. Méthodologie pour la maîtrise du risque sanitaire

Palavras-chave: Zygomycetes; Food; Contamination; Isolation.

Ano: 2008

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000400019

L'arsenic en milieu marin. Biogeochimie et ecotoxicologie

Fradet, Alain.

L'augmentation récente de la production mytilicole nationale et l'application de la directive 91/492 CEE relative aux conditions sanitaires de la production et de la mise sur le marché des mollusques bivalves vivants sont venues perturber les habitudes de mise sur le marché des moules en France. La concurrence entre bassins mytilicoles et dans une moindre mesure avec les produits d'importation conduit les professionnels à vouloir différencier la qualité de leurs produits pour éviter la baisse généralisée des cours observée depuis la fin des années 1980. Par ailleurs, la nouvelle réglementation en place impose aux mytiliculteurs de s'assurer de la qualité sanitaire des moules qu'ils mettent sur le marché par des autocontrôles obligatoires. Les difficultés...

Tipo: Text

Palavras-chave: Bivalves; Mytiliculture; Production; Contamination; Normes; Qualité; Établissements mytilicoles; Autocontrôles; HACCP.

Ano: 1997

URL: http://archimer.ifremer.fr/doc/00103/21441/19022.pdf

Le cadmium en milieu marin. Biogéochimie et écotoxicologie.

Michel, Pierre.

Arsenic levels of in the marine environment are high in comparison with other contaminants. Over the past twenty years, a large number of arsenic organic compounds have been identified in the water, sediments and living species. This document constitutes a synthesis of current knowledge on arsenic sources, and contamination levels, on its biogeochemical cycle as well as its toxic effects on human and marine fauna. This paper highlights in particular the effects of phosynthesis on arsenic speciation and its distribution throughout the marine environment. Problems of toxicity in the case of certain phyto- and zooplankton species are identified. Bioaccumulation in seaweeds, molluscs and fishes is documented as well, with special attention to the species...

Tipo: Text

Palavras-chave: Ecotoxicology; Contamination; Biogeochemistry; Arsenic; Ecotoxicologie; Contamination; Biogéochimie; Arsenic.

Ano: 1993

URL: http://archimer.ifremer.fr/doc/1993/rapport-1448.pdf

Cossa, Daniel; Lassus, Patrick.

This report synthesizes the knowledge on the biogeochemical cycle, bioconcentration processes and ecotoxicity of cadmium in the marine environment. Man induced changes on the cadmium cycle, especially along the French coasts are reviewed. Concentration levels, mechanisms and fluxes between geochemical reservoirs are assessed. Emphasis is given on sublethal effects and toxicity mechanisms. Quality standards used in European Community countries are listed. Conclusions and recommendations for environmental management and research are given.

Tipo: Text

Palavras-chave: Cadmium; Biogéochimie; Contamination; Écotoxicologie.; Cadmium; Biogeoclzemistry; Contamination; Ecotoxicology.

Ano: 1989

URL: http://archimer.ifremer.fr/doc/00332/44312/43866.pdf

Le mercure en milieu marin. Biogéochimie et écotoxicologie

Cossa, Daniel; Thibaud, Yves; Roméo, Michèle; Gnassia-barelli, Mauricette.

This report synthesizes the knowledge on the biogeochemical cycle, bioconcentration processes and ecotoxicity of mercury in the marine environment. Man induced changes on the mercury cycle, especially along the French coasts are reviewed. Concentration levels, mechanisms and fluxes between geochemical reservoirs are assessed. Emphasis is given on sublethal effects and toxicity mechanisms. Quality standards used in European Community countries are listed. Conclusions and recommendations for environmental management and research are given.

Tipo: Text

Palavras-chave: Mercure; Biogéochimie; Contamination; Écotoxicologie; Mercury; Biogeochemistry; Contamination; Ecotoxicology.

Ano: 1990

URL: http://archimer.ifremer.fr/doc/00332/44319/43890.pdf

Le plomb en milieu marin. Biogeochimie et ecotoxicologie

Cossa, Daniel; Elbaz-poulichet, Françoise; Gnassia-barelli, Mauricette; Romeo, Michèle.

This report synthesises the knowledge on the biogeochemical cycle, bioconcentration processes and ecotoxicity of lead in the marine environment. Man induced changes on the lead cycle, especially along the French coasts are reviewed. Concentration levels, mechanisms and fluxes between geochemical reservoirs are assessed. Emphasis is given on sublethal effects and toxicity mechanisms. Quality standards used in European Community countries are listed. Conclusions and recommendations for environmental management and research are given.

Tipo: Text

Palavras-chave: Ecotoxicology; Contamination; Biogeochemistry; Lead; Ecotoxicologie; Contamination; Biogeochimie; Plomb.

Ano: 1993

URL: http://archimer.ifremer.fr/doc/1993/rapport-1449.pdf

Leaching and residual activity of imidazolinone herbicides in lowland soils

Ciência Rural

Refatti,João Paulo; Avila,Luis Antonio de; Noldin,José Alberto; Pacheco,Igor; Pestana,Rodrigo Ribeiro.

ABSTRACT: Herbicides used in the Clearfield® rice (Oryza sativa L.) production system have a potential for leaching. This can result in contamination of underground water resources and cause injury to not tolerant crops that are sown in a succession and/or crop rotation. The objective of this study was to determine the leaching potential and the residual activity of the herbicides used in the Clearfield® rice system. The experiment was conducted over a period of two years and consisted of conducting a field test to be followed by two bioassays with a year of difference between their implementation. Initially an experiment was conducted in lowland area where it was planted the cultivar of rice ‘PUITA INTA CL’. Approximately one and two years thereafter,...

Les polychlorobiphényles (PCB) en milieu marin : biogéochimie et écotoxicologie

Palavras-chave: Imazethapyr; Imazapic; Imazapyr; Contamination; Groundwater.

Ano: 2017

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000500154

Marchand, Michel; Abarnou, Alain; Marcaillou-le Baut, Claire.

This report synthesizes the knowledge on the behaviour, bioconcentration processes and ecotoxicity ofPCB in the marine environment. Contamination levels of the French coasts are examined. Concentration levels, mechanisms andfluxes between geochemicai reservoirs are assessed. Emphasis is given on subiethai effects and toxicity mechanisms. Quality standards used in European Community countries are listed. Conclusions and recommendations for environmentai management and research are given.

Tipo: Text

Palavras-chave: PCB; Biogéochimie; Contamination; Écotoxicologie; PCBs; Biogeochemistry; Contamination; Ecotoxicology.

Ano: 1990

URL: http://archimer.ifremer.fr/doc/00148/25954/24045.pdf

L'étain et les organoétains en milieu marin. Biogéochimie et écotoxicologie.

Lime and phosphate effects on atrazine sorption, leaching and runoff in soil

Alzieu, Claude.

This report synthesizes the knowledge on the biogeochemical cycle, bioconcentration processes and ecotoxicity of tin and organotins in the marine environment. Concentrations levels, biomethylation mechanisms and exchanges between sediments and water are assessed. Emphasis is given on tributyltin sublethal effects, toxicity mechanisms and no effect levels for the most sensitive organisms. Regulations on the use of organotins as antifoulants in paints are examined. Conclusions and recommendations for environmental management and research are given.

Tipo: Text

Palavras-chave: Étain; Biogéochimie; Contamination; Écotoxicologie.; Tin; Biogeochemistry; Contamination; Ecotoxicology.

Ano: 1989

URL: http://archimer.ifremer.fr/doc/00332/44314/43883.pdf

Ciência e Agrotecnologia

Lima,José Maria de; Aquino,Regimeire Freitas; Magalhães,Ciro Augusto de Souza; Gonçalves,Raissa Homem; Nóbrega,Júlio Cesar Azevedo; Mello,Carlos Rogério.

ABSTRACT Atrazine still is a widely used herbicide in tropical soils to control annual broad-leaved weeds and annual grasses mainly in maize and sorghum plantations. Sorption and desorption in such soils are important processes that affect transport, ending with soil and water contamination, not only in these soils, but in other soils around the world. Lime and phosphate are important amendments in tropical soils to mitigate low fertility. These treatments can affect interaction among soil particles and between soil and atrazine. The objectives here were to evaluate the effect of lime, phosphate, and lime + phosphate treatments on sorption and transport of atrazine in a Typic Hapludult, using soil-erosion-plots at field conditions in a 3%-slope landscape...

Lixiviación de atrazina en un vertisol del Bajío de Guanajuato, México

Palavras-chave: Contamination; Pesticide; Argisol; Soil erosion plots..

Ano: 2020

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100204

Macroplastic and microplastic contamination assessment of a tropical river (Saigon River, Vietnam) transversed by a developing megacity

Hernández Vargas, Juan.

La aplicación de plaguicidas en las áreas agrícolas puede causar contaminación ambiental. Por lo general los estudios sobre migración de plaguicidas en los terrenos agrícolas se realizan a través del muestreo periódico del suelo, agua y plantas. Tal enfoque es caro (150.00 USD solamente por análisis de un grupo químico de plaguicidas) y frecuentemente no permite pronosticar el nivel de contaminación potencial a futuro. Existen métodos para minimizar el costo de las investigaciones en campo a través de simulación matemática de los procesos de migración de plaguicidas ante todo en el suelo. Para aplicar estos métodos es necesario conocer algunos parámetros de transporte de plaguicidas en perfil del suelo. En el presente trabajo se realizaron experimentos...

Tipo: Tesis

Palavras-chave: Herbicida; Dispersividad; Velocidad; Degradación; Contaminación; Maestría; Hidrociencias; Herbicide; Dispersivity; Velocity; Degradation; Contamination.

Ano: 2008

URL: http://hdl.handle.net/10521/1633

Manejo y uso de biosólidos en suelos agrícolas

Lahens, Lisa; Strady, Emilie; Kieu-le, Thuy-chung; Dris, Rachid; Boukerma, Kada; Rinnert, Emmanuel; Gasperi, Johnny; Tassin, Bruno.

Both macroplastic and microplastic contamination levels were assessed for the first time in a tropical river estuary system, i.e. the Saigon River, that traverses a developing South East Asian megacity, i.e. Ho Chi Minh City, Vietnam. The analysis of floating debris collected daily on the Nhieu Loc - Thi Nghe canal by the municipal waste management service shows that the plastic mass percentage represents 11-43%, and the land-based plastic debris entering the river was estimated from 0.96 to 19.91 g inhabitant-1 d-1, namely 350 to 7270 g inhabitant-1 yr-1. Microplastics were assessed in the Saigon River and in four urban canals by sampling bulk water for anthropogenic fiber analysis and 300 μm mesh size plankton net exposition for fragment analysis. Fibers...

Tipo: Text

Palavras-chave: Microplastic; Macroplastic; Urban river; Contamination; Anthropogenic fibers.

Ano: 2018

URL: https://archimer.ifremer.fr/doc/00427/53815/55460.pdf

Robledo Santoyo, Edmundo.

Como subproducto del tratamiento de las aguas residuales de la ciudad de Aguascalientes, Ags., en la Planta de Tratamiento “El Niágara”, se generan diariamente de 150 a 170 m3 de biosólidos. Estos materiales son aplicados a suelos agrícolas de áreas cercanas a la planta, sin regulación alguna, por lo que se han obtenido buenos resultados o causado quemaduras en plántulas o endurecimiento de suelos. El objetivo de este proyecto fue generar estrategias para la disposición y aprovechamiento de los biosólidos para mejorar suelos agrícolas y la calidad y rendimiento de los cultivos, sin perjuicio para el ambiente. Para determinar el efecto de los biosólidos sobre suelos y plantas, se colectaron muestras de los biosólidos y se tomaron muestras de tres tipos de...

Palavras-chave: Aguas residuales; Metales pesados; Contaminación; Mejoradores del suelo; Wastewater; Heavy metals; Contamination; Soil amendments; Edafología; Doctorado.

Ano: 2012

URL: http://hdl.handle.net/10521/1733

Mecanismos de tolerancia del simbiosistema Azolla-Anabaena azollae ante arsénico y cobre.

Sánchez Viveros, Gabriela.

Esta investigación evaluó algunos mecanismos de tolerancia del simbiosistema Azolla-Anabaena azollae ante agua contaminada con arsénico (As+5) y/o cobre (Cu2+). Para lo anterior, se plantearon seis fases experimentales: 1) identificar molecularmente a nivel de especie a diez colectas de Azolla, 2) evaluar la capacidad de acumulación de As+5 y los efectos tóxicos del metaloide en el simbiosistema Azolla-Anabaena azollae, 3) determinar la influencia del As+5 en la concentración de nueve elementos en las frondas de Azolla filiculoides, 4) evaluar el efecto del Cu2+ sobre la actividad fotosintética y permeabilidad de la membrana de Azolla filiculoides y Azolla caroliniana, 5) comparar la capacidad de acumulación de Cu2+ en dos especies de Azolla y, 6) conocer...

Palavras-chave: Contaminación; Fitorremediación; Helechos; Metales pesados; Metaloides; Contamination; Ferns; Heavy metals; Metalloids; Phytoremediation; Edafología; Doctorado.

Ano: 2012

URL: http://hdl.handle.net/10521/632

Mercury in seabird feathers: Insight on dietary habits and evidence for exposure levels in the western Indian Ocean

Kojadinovic, Jessica; Bustamante, Paco; Churlaud, Carine; Cosson, Richard P.; Le Corre, Matthieu.

Breast feathers were used to estimate mercury levels in six marine birds nesting in the tropical western Indian Ocean, i.e. Sooty Tern (Sterna fuscata), Brown Noddy (Anous stolidus), Lesser Noddy (Anous tenuirostris), Audubon Shearwater (Puffinus lherminieri bailloni), Barau's Petrel (Pterodroma baraui) and the White-tailed Tropicbird (Phaethon lepturus). Juveniles consistently showed lower plumage mercury than adults. The lowest mean level was noted in juvenile Sooty Terns from the Glorioso Archipelago (0.05 mu g g(-1)). The highest levels were obtained for adult Barau's Petrels from Reunion Island (0.96 mu g g(-1)). An inter-site analysis of Sooty Tern showed higher mercury levels in birds nesting on Juan de Nova Island. Levels were low in comparison...

Tipo: Text

Palavras-chave: Tropical islands; Contamination; Bioaccumulation; Mercury; Trophic ecology; Marine birds.

Ano: 2007

URL: http://archimer.ifremer.fr/doc/2007/publication-3416.pdf

Metal and metalloid bioaccumulation in the Pacific blue shrimp Litopenaeus stylirostris (Stimpson) from New Caledonia: Laboratory and field studies