Organochlorine pesticides residues and PCBs in benthic organisms of the inner shelf of the São Sebastião Channel, São Paulo, Brazil

Abstract

Thirty seven benthic samples of the inner shelf area of São Sebastião, Brazil, were collected between April 1994 and August 1998 and analysed for seventeen chlorinated pesticide residues and PCBs congeners. Pesticide residues and PCBs congeners levels were low (ng/g) and predominantly found in the crustacean samples. DDE was the most frequently residue with a maximum of 9,7 ng/g followed by HCHs with maximum of 17,1ng/g. As for the PCBs, the heavier congeners predominate: CB 138,153,170, 180 and 183. Maximum total PCBs was 17,4 ug/g in a crab sample. Higher levels of PCBs are related to feeding habits and local inputs of raw sewage or land runoff. Although EPA and FDA (U.S.A) below the guidelines for human consumption propose these levels, they do show that even in marine areas without intense agricultural or industrial activities these compounds are present at detectable levels.<br>Trinta e sete amostras de bentos da área interna do Canal de São Sebastião, Brasil, foram coletadas entre Abril de 1994 e Agosto de 1998 e analisadas quanto aos níveis de resíduos de 17 pesticidas organoclorados os congêneres dos PCBs. Os níveis de resíduos de organoclorados e PCBs foram baixos( ng/g) e encontrados com maior freqüência nas amostras de crustáceos. DDE foi o resíduo de pesticida encontrado com mais freqüência apresentado um máximo de 9,7 ng/g seguido dos isômeros de HCHs com um máximo de 17,1 ng/g. No caso dos PCBs os congêneres mais pesados foram os predominantes: CB 138, 153, 170, 180 e 183. O valor máximo de PCBs totais foi de 17,4 ug/g numa amostra de crustáceo. Níveis maiores de PCBs estão associados aos hábitos alimentares e introduções pontuais de esgotos e água de drenagem urbana. Apesar dos níveis observados estarem abaixo dos recomendados para consumo humano pela EPA e da FDA( U.S.A) ,eles demonstram que mesmo em área marinhas costeiras sem agricultura intensiva ou atividades industriais de porte , estes compostos orgânicos persistentes sintéticos ( POPS) estão presentes em níveis mensuráveis

Organochlorine pesticides (OCs) and polychlorinated biphenyls (PCBs) in sediments and crabs (Chasmagnathus granulata, Dana, 1851) from mangroves of Guanabara Bay, Rio de Janeiro State, Brazil

“…Thus, the eggs may be viewed as a unique form of excretion of these contaminants from the crab's body. Other available study with benthic organisms (decapod crustaceans) along the Sao Paulo coastal area, showed that the total PCB and DDT levels were lower than 20 ppb (dry weight), one order of magnitude lower than the present results (Gorni & Weber, 2004). These results agree with that found by There seems to have no direct correspondence between soil concentration and egg concentration of organochlorines in the study area ( Figure 5), especially for PCBs.…”

Distribution and Spatial Trends of PCBs in Commercial Scallops from Galician Littoral (NW, Spain). Possible Influence of Biometric Parameters

“…PCB profiles of scallops were similar to the profile of other bivalve or cephalopod mollusks, crustaceans, such as mussel, cockle, clam, octopus, crabs collected in other marine or estuarine systems (Carro and others 2004; Gorni and Weber 2004; Storelli and others 2006; Denton and others 2006). The PCB profile was dominated by the higher chlorinated congeners, the lower chlorinated congeners were present in very low concentrations.…”

Araçá: biodiversidade, impactos e ameaças

“…Kihara & Rocha, 1993-Callinectes danae Smith, 1869Lacerda, 1981Mossolin, 1994;Caprara & Freitas, 1996;Lowenthal et al 1996;Nucci, 1998;Genofre et al 2000;Nucci et al 2001;Turra & Leite, 2005;Padovanni, 2009-Callinectes ornatus Ordway, 1863Nucci, 1998Nucci et al 2001;Gorni & Weber, 2004-Clibanarius antillensis Stimpson, 1862Garcia, 1979Brossi-Garcia & Hebling, 1983;Arantes & Leite, 1991bJacobi, 1992;Leite et al 1995Leite et al , 1996Nalesso et al 1995;, 20022004Turra et al , 1999Turra et al , 2000Barata et al 1996;Castelo-Branco et al 1996;Jacobucci & Leite, 1996;Turra & Denadai, 2001, 2002, 2004Souza, 2003;Turra, 2003Turra, , 2004Turra, , 2005 Clibanarius sclopetarius (Herbst,1796) Brossi- Garcia, 1987;Arantes & Leite, 1991bJacobi, 1992;Leite et al 1995...…”