Journal of The Brazilian Society of Ecotoxicology最新文献_第2页

Toxicity of Glyphosate on Physalaemus albonotatus (Steindachner, 1864) from Western Brazil 草甘膦对巴西西部albonotatus (Steindachner, 1864)的毒性

Journal of The Brazilian Society of Ecotoxicology Pub Date : 2013-06-19 DOI: 10.5132/EEC.2013.01.008

F. Simioni, Débora Guimarães da Silva, T. Mott

{"title":"Toxicity of Glyphosate on Physalaemus albonotatus (Steindachner, 1864) from Western Brazil","authors":"F. Simioni, Débora Guimarães da Silva, T. Mott","doi":"10.5132/EEC.2013.01.008","DOIUrl":"https://doi.org/10.5132/EEC.2013.01.008","url":null,"abstract":"Amphibian declines have been reported worldwide and pesticides can negatively impact this taxonomic group. Brazil is the world’s largest consumer of pesticides, and Mato Grosso is the leader in pesticide consumption among Brazilian states. However, the effects of these chemicals on the biota are still poorly explored. The main goals of this study were to determine the acute toxicity (CL50) of the herbicide glyphosate on Physalaemus albonotatus, and to assess survivorship rates when tadpoles are kept under sub-lethal concentrations. Three egg masses of P. albonotatus were collected in Cuiaba, Mato Grosso, Brazil. Tadpoles were exposed for 96 h to varying concentrations of glyphosate to determine the CL50 and survivorship. The CL50 was 5.38 mg L-1 and there were statistically significant differences in mortality rates and the number of days that P. albonotatus tadpoles survived when exposed in different sub-lethal concentrations of glyphosate. Different sensibilities among amphibian species may be related with their historical contact with pesticides and/or specific tolerances. Further studies are required to determine the degree to which this taxonomic group is threatened by chemical contaminants.","PeriodicalId":163251,"journal":{"name":"Journal of The Brazilian Society of Ecotoxicology","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125512036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Respuesta de biomarcadores bioquímicos, morfológicos y comportamentales de la carpa común, Cyprinus carpio, por exposición a muestras ambientales 鲤鱼(Cyprinus carpio)暴露于环境样本后的生化、形态和行为生物标志物的反应

Journal of The Brazilian Society of Ecotoxicology Pub Date : 2013-06-19 DOI: 10.5132/EEC.2013.01.006

Patricia M. Castañé, B. L. Eissa, Natalia Alejandra Ossana

{"title":"Respuesta de biomarcadores bioquímicos, morfológicos y comportamentales de la carpa común, Cyprinus carpio, por exposición a muestras ambientales","authors":"Patricia M. Castañé, B. L. Eissa, Natalia Alejandra Ossana","doi":"10.5132/EEC.2013.01.006","DOIUrl":"https://doi.org/10.5132/EEC.2013.01.006","url":null,"abstract":"Se caracterizo la calidad ecotoxicologica del agua del rio Lujan, en 3 sitios de su trayecto con grado dispar de estres, mediante bioensayos semi-estaticos utilizando la carpa comun, Cyprinus carpio. Con un dispositivo y software especial se registro diariamente la ubicacion espacial de los peces durante el periodo control (agua potable) y el de exposicion (agua del rio), y se calculo el Indice de Actividad Relativa (Ia). Se calculo el Factor de Condicion (FC), y en cerebro se midio la actividad acetilcolinesterasica (AChE) y el contenido de proteinas totales. La morfologia de las branquias se analizo por microscopia electronica de barrido (MEB). En las muestras de agua se midieron: conductividad, pH, dureza, oxigeno disuelto, nitratos, cloruros, solidos totales y metales pesados. Se observo en los peces expuestos al agua del rio: a) un incremento significativo del Ia, y de AChE, b) la MEB revelo hipertrofia celular y ligera fusion de las lamelas secundarias. En algunos casos los metales excedieron los limites maximos para proteccion de la vida acuatica. En todas las muestras del rio se observo una mezcla compleja de metales pesados y algunos cationes y aniones, que produjeron efectos subletales en los organismos, puestos de manifiesto por la respuesta de los biomarcadores determinados.","PeriodicalId":163251,"journal":{"name":"Journal of The Brazilian Society of Ecotoxicology","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131531903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Multixenobiotic resistance mechanism monitoring: standardization of fluorescence emmited by Rhodamine B 多外源耐药机制监测:罗丹明B荧光标准化

Journal of The Brazilian Society of Ecotoxicology Pub Date : 2013-06-19 DOI: 10.5132/EEC.2013.01.014

M. L. Pessatti, J. D. Fontana

引用次数: 2

Avaliação de metais em pescado da região do Pontal da Barra, Laguna dos Patos, Pelotas-RS 蓬塔尔达巴拉，拉古纳多斯帕托斯，佩洛塔斯-RS地区鱼类中的金属评价

Journal of The Brazilian Society of Ecotoxicology Pub Date : 2013-06-19 DOI: 10.5132/EEC.2013.01.015

P. J. S. Filho, Vanice Koschier da Fonseca, Luciane Holbig

{"title":"Avaliação de metais em pescado da região do Pontal da Barra, Laguna dos Patos, Pelotas-RS","authors":"P. J. S. Filho, Vanice Koschier da Fonseca, Luciane Holbig","doi":"10.5132/EEC.2013.01.015","DOIUrl":"https://doi.org/10.5132/EEC.2013.01.015","url":null,"abstract":"Os metais pesados tem a capacidade de acumular-se em tecidos vivos ao longo da cadeia alimentar. Peixes podem se tornar a principal forma de transferir para a populacao esses elementos, uma vez que eles sao capazes de bioacumulacao e bioconcentracao. Com o objetivo de investigar a bioacumulacao nos peixes no Pontal da Barra-Laguna dos Patos, em Pelotas, foram escolhidas tres especies abundantes na regiao, Micropogonias furnieri (Corvina), Mugil platanus (Tainha) e Netuma barba (Bagre). Amostras da sua musculatura foram analisados para verificar o conteudo de Al, Cd, Cr, Cu, Fe, Mn, Ni, Pb e Zn. Amostras em quintuplicata sofreram digestao acida HNO3/HCIO4, sendo os extratos analisados por plasma indutivamente acoplado - espectrometria de emissao optica (ICP-OES). Os niveis de cromo encontrados nas tres especies estavam acima dos estabelecidos pela legislacao brasileira (Decreto-Lei 55,871-65), que determinam como um nivel maximo tolerado para o cromo 0,1 mg kg-1. Os 82,46 ± 4,69% mg kg-1 de zinco na especie, Netuma barba, tambem excedeu o limite permitido. As concentracoes de cadmio encontrada na especie Micropogonias furnieri, 0,92 ± 8,16% mg kg-1 ficaram proximas ao limite permitido. Os demais analitos, encontraram-se em niveis inferiores aos estabelecidos pelo Ministerio da Saude e Anvisa.","PeriodicalId":163251,"journal":{"name":"Journal of The Brazilian Society of Ecotoxicology","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114782613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Cholinestarase activity in methylmercury and mercury chloride exposure fish 甲基汞和氯化汞暴露鱼的胆碱酯酶活性

Journal of The Brazilian Society of Ecotoxicology Pub Date : 2013-06-19 DOI: 10.5132/EEC.2013.01.022

T. B. Jesus, J. Colombi, C. Ribeiro, H. Assis, C. Carvalho

引用次数: 9

Toxicity assessment of an effluent derived from an inactivated uranium mine: the Poços de Caldas (Brazil) example 对一个灭活铀矿流出物的毒性评估:poos de Caldas(巴西)的例子

Journal of The Brazilian Society of Ecotoxicology Pub Date : 2013-06-19 DOI: 10.5132/EEC.2013.01.005

M. Artal, G. Almeida, A. Caloto-Oliveira, Maria Alice Santos, G. Umbuzeiro, Cassiana Maria Reganhan Coneglian

{"title":"Toxicity assessment of an effluent derived from an inactivated uranium mine: the Poços de Caldas (Brazil) example","authors":"M. Artal, G. Almeida, A. Caloto-Oliveira, Maria Alice Santos, G. Umbuzeiro, Cassiana Maria Reganhan Coneglian","doi":"10.5132/EEC.2013.01.005","DOIUrl":"https://doi.org/10.5132/EEC.2013.01.005","url":null,"abstract":"Uranium mines can cause environmental impact because of acid mine drainages can reaches the surrounding water bodies. In this work we tested effluent samples from an inactivated uranium mine located in Pocos de Caldas city (Minas Gerais, Brazil) for acute and chronic toxicity. Untreated effluents were acutely toxic to Daphnia similis, with EC50 (48 h) varying from <0.01% to 38%. Both treated and untreated effluent samples presented chronic toxicity to Ceriodaphnia dubia. Vibrio fischeri acute toxicity tests were negative for all tested samples. Adjustment of pH performed in samples was not sufficient to remove acute toxicity indicating that not only pH was responsible for the observed effect. The physical-chemical treatment applied was not able to remove the chronic toxicity to C. dubia. V. fischeri, although a rapid test and easy to handle, was not sensitive to the level of toxicants present in the effluent from the mine. To determine the actual impact of the discharge of effluent into receiving waters, both the flow of the effluent and river should be considered. Nevertheless chronic toxicity tests with C. dubia could be included in the monitoring program of this facility to provide more information about the impact of this discharge.","PeriodicalId":163251,"journal":{"name":"Journal of The Brazilian Society of Ecotoxicology","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117328703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Effects on DNA and cell viability of treated water contaminated with Cylindrospermopsis raciborskii extract including cylindrospermopsin 含柱精子素的柱精子提取物污染水后对DNA和细胞活力的影响

Journal of The Brazilian Society of Ecotoxicology Pub Date : 2013-06-19 DOI: 10.5132/EEC.2013.01.020

A. Fonseca, A. Lankoff, S. Azevedo, R. M. Soares

{"title":"Effects on DNA and cell viability of treated water contaminated with Cylindrospermopsis raciborskii extract including cylindrospermopsin","authors":"A. Fonseca, A. Lankoff, S. Azevedo, R. M. Soares","doi":"10.5132/EEC.2013.01.020","DOIUrl":"https://doi.org/10.5132/EEC.2013.01.020","url":null,"abstract":"It is well known that chlorine can oxidize cyanotoxins, thus increasing water potability. Considering that the first steps of conventional treatment do not remove the toxins, the aim of this study was to investigate the toxicity of treated water containing cylindrospermopsin after chlorine addiction. It was analyzed DNA damage and viability of HepG2 cells exposed to the following treatments: cylindrospermopsin (CYN) containing extract of Cylindrospermopsis raciborskii; this same extract added to treated water; non toxic C. raciborskii (all extracts at concentration of 0.1, 0.5 and 1 μg of dry material mL-1), and treated water only. Cells were exposed for 24, 48 and 72 hours. A decrease in cell viability of HepG2 cells was observed after the treatment with toxic C. raciborskii extract (at 0.5 and 1 μg mL-1 for all times of exposure) and the toxic extract with treated water at the two higher concentrations at 48 and 72 hours. Comet assays also revealed DNA damage in HepG2 cells under toxic C. raciborskii extract. Data indicated that chlorine can prevent damage to DNA and to cell viability in most of conditions. In conclusion, chlorine addiction in conventional water treatment has a potential to provide protection or reduce toxic effects of CYN.","PeriodicalId":163251,"journal":{"name":"Journal of The Brazilian Society of Ecotoxicology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129874951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Bioensaios para avaliação da toxicidade aguda, reprodução e ganho de biomassa de minhocas (Eisenia fetida) ambientadas em lodo de esgoto doméstico 评价生活污水污泥中蚯蚓(爱森菌)的急性毒性、繁殖和生物量增益的生物测定

Journal of The Brazilian Society of Ecotoxicology Pub Date : 2013-06-19 DOI: 10.5132/EEC.2013.01.021

Paulo R. Dores-Silva, M. D. Landgraf, M. Rezende

引用次数: 3

Population Approach in Ecotoxicology (Stress Ecology) 生态毒理学中的种群方法(应激生态学)

Journal of The Brazilian Society of Ecotoxicology Pub Date : 2013-06-19 DOI: 10.5132/EEC.2013.01.011

M. N. Flynn, W. R. Pereira

引用次数: 0

Riscos à biota aquática pelo uso de tintas anti-incrustantes nos cascos de embarcações 在船体上使用防污涂料对水生生物造成的风险

Journal of The Brazilian Society of Ecotoxicology Pub Date : 2013-06-18 DOI: 10.5132/EEC.2013.01.001

T. L. Martins, V.M.F. Vargas

引用次数: 3