ABSTRACT
No complexo estuarino lagunar de Cananéia, estado de São Paulo, região sudeste, há o consumo in natura da ostra invasora Saccostrea cucullata, principalmente no verão, alta temporada. Trata-se de um molusco filtrador que apresenta riscos de graves patologias do sistema gastrointestinal devido ao risco de armazenamento de agentes microbiológicos que afetam o ser humano. A falta de monitoramento, boas práticas de fabricação, qualidade da água e medidas de controle para garantir a segurança e qualidade do consumo de ostras é necessária para a prevenção de patógenos na saúde pública. Este estudo realizou análises microbiológicas de amostras de ostras, com foco em bactérias mesófilas, bactérias psicrotróficas e fungos/leveduras. Além disso, investigou-se as concentrações sazonais de coliformes totais e termotolerantes em amostras de ostras coletadas ao longo de um ano. As contagens de bactérias mesófilas nas ostras variaram de 1,45±0,22 a 3,32±0,28 log UFC g1, com valores médios de 2,24±0,86 log UFC g1. Para bactérias psicrotróficas nas amostras de ostras variou entre 1,34±0,29 e 3,12±0,45 log UFC g1. Os dados revelaram que as contagens de fungos e leveduras variaram de 2,65±0,23 a 3,57±0,22 log UFC g1. A contagem máxima de S. aureus foi de 1,24 log UFC g1, e 83,5% das amostras apresentaram resultado negativo para este microrganismo. Não foi detectada presença de Salmonella spp. nas amostras analisadas. Esses resultados fornecem insights importantes sobre a variação sazonal e as contagens microbiológicas em amostras de ostras, destacando a relevância da monitorização e controle microbiológico em produtos alimentícios marinhos.
In the estuarine lagoon complex of Cananéia, state of São Paulo, southeast region, there is fresh consumption of the invasive oyster Saccostrea cucullata, mainly in summer, high season. It is a filter-feeding mollusk that presents a risk of serious pathologies of the gastrointestinal system due to the risk of storing microbiological agents that affect humans. The lack of monitoring, good manufacturing practices, water quality and control measures to ensure the safety and quality of oyster consumption is necessary for the prevention of pathogens in public health. This study carried out microbiological analyzes of oyster samples, focusing on mesophilic bacteria, psychrotrophic bacteria and fungi/yeasts. Furthermore, seasonal concentrations of total and thermotolerant coliforms were investigated in oyster samples collected over a year. Counts of mesophilic bacteria in oysters ranged from 1.45±0.22 to 3.32±0.28 log CFU g1, with average values of 2.24±0.86 log CFU g1. For psychrotrophic bacteria in oyster samples it ranged between 1.34±0.29 and 3.12±0.45 log CFU g1. The data revealed that fungal and yeast counts ranged from 2.65±0.23 to 3.57±0.22 log CFU g1. The maximum S. aureus count was 1.24 log CFU g1, and 83.5% of the samples tested negative for this microorganism. No presence of Salmonella spp. was detected in the analyzed data. These results provide important insights into seasonal variation and microbiological counts in oyster samples, highlighting the relevance of microbiological monitoring and control in marine food products.
ABSTRACT
The present work aimed to record the first presence of abnormal age rings in Cathorops spixii lapillusotoliths from Cananeia-Iguape Estuarine-Lagoon Complex (CIELC), Southern region of Brazilian coast. In August 2018, 59 specimens of C. spixii (Siluriformes, Ariidae) were collected during one station sampling in the northern (n = 25) and another in the southern sector (n = 33) of CIELC. In general, among the otoliths that presented age ring alterations, this divergent zone was observed in opaque and translucent layers, on the right side, between the fifth and seventh age rings.
O presente trabalho teve por objetivo apresentar o primeiro relato de anéis etários anormais nos otólitos lapillus de Cathorops spixii do Complexo estuarino-lagunar de Cananéia-Iguape (CELCI), região sul do litoral brasileiro. Em agosto de 2018, 59 espécimes de C. spixii (Siluriformes, Ariidae) foram coletados durante uma estação de amostragem no setor norte (n = 25) e outra no setor sul (n = 33) do (CELCI). Em geral, entre os otólitos que apresentavam alterações nos anéis de idade, essa zona divergente foi observada em camadas opacas e translúcidas, do lado direito, entre o quinto e o sétimo anéis de idade.
Subject(s)
Animals , Otolithic Membrane/abnormalities , Catfishes/abnormalitiesABSTRACT
The present work aimed to record the first presence of abnormal age rings in Cathorops spixii lapillusotoliths from Cananeia-Iguape Estuarine-Lagoon Complex (CIELC), Southern region of Brazilian coast. In August 2018, 59 specimens of C. spixii (Siluriformes, Ariidae) were collected during one station sampling in the northern (n = 25) and another in the southern sector (n = 33) of CIELC. In general, among the otoliths that presented age ring alterations, this divergent zone was observed in opaque and translucent layers, on the right side, between the fifth and seventh age rings.(AU)
O presente trabalho teve por objetivo apresentar o primeiro relato de anéis etários anormais nos otólitos lapillus de Cathorops spixii do Complexo estuarino-lagunar de Cananéia-Iguape (CELCI), região sul do litoral brasileiro. Em agosto de 2018, 59 espécimes de C. spixii (Siluriformes, Ariidae) foram coletados durante uma estação de amostragem no setor norte (n = 25) e outra no setor sul (n = 33) do (CELCI). Em geral, entre os otólitos que apresentavam alterações nos anéis de idade, essa zona divergente foi observada em camadas opacas e translúcidas, do lado direito, entre o quinto e o sétimo anéis de idade.(AU)
Subject(s)
Animals , Catfishes/abnormalities , Otolithic Membrane/abnormalitiesABSTRACT
An evaluation of the concentrations, bioavailability and sources of polycyclic aromatic hydrocarbons (PAHs) and persistent organic pollutants (POPs) was performed in the industrialized estuary of Santos-São Vicente and in the Cananéia-Iguape estuarine lagoon system, considered an Atlantic forest biosphere reserve, using different approaches. Semipermeable membrane devices (SPMDs) and bivalves (Crassostrea brasiliana) were deployed in both estuarine systems. Samples of water, suspended particulate material (PM), and sediments were also collected in these regions. The concentrations of PAHs in the water and in the PM from both estuarine systems were similar. In the sediment, the concentrations of PAHs and POPs were higher in the estuary of Santos-São Vicente than in the Cananéia-Iguape estuarine lagoon system. The accumulation of PAHs and POPs by the SPMD and C. brasiliana revealed that in both regions the bioavailability of contaminants was similar. Because of the hydrophobicity of the organic compounds, each matrix responded in a different manner to the source of the contaminants; C. brasiliana and sediment were primarily associated with 4-5 ring-PAHs that represent pyrolytic sources of hydrocarbons, whereas water and the SPMDs were correlated with the 2-3 ring-PAHs, which represent petrogenic sources. The PM produced an intermediated concentration among these compartments and was related to the concentration of POPs. Because no significant differences between the mean concentrations of contaminants in both studied regions were observed, anthropogenic effects currently impact the Cananéia-Iguape lagoon system, which was initially considered a pristine area.
Subject(s)
Environmental Monitoring , Estuaries , Water Pollutants, Chemical/analysis , Environmental Pollutants , Forests , Geologic Sediments , Hydrocarbons , Industrial Development , Organic Chemicals , Polycyclic Aromatic Hydrocarbons/analysis , Surveys and Questionnaires , WaterABSTRACT
In order to understand environmental health by the use of a bioindicator species in estuaries, biochemical responses observed in the catfish Cathorops spixii such as catalase (CAT), glutathione-S-transferase (GST), lipid peroxidation (LPO) and acetylcholinesterase (AChE) were evaluated in liver and muscle. Furthermore, histological changes were also verified in liver and gills preparations. Fish were collected in three sites of the Santos-São Vicente estuary located at São Paulo (Brazil), subjected to varying levels of inputs of pollutants. For a reference site, specimens were sampled at Cananéia estuary at southern coast of São Paulo, a region with low anthropogenic influence. In general, no significant seasonal differences in antioxidant enzymes and lipid peroxidation responses were found in the organisms from the Cananéia estuary. However, in the polluted estuary (Santos-São Vicente), biochemical responses were observed by increases in GST hydroperoxides and decreases in AChE activities in the summer. Inhibition of AChE expression in fish from different areas of the Santos-São Vicente estuary in the summer was also found and can indicate neurotoxic effects in these organisms. Histopathological observation of gill and liver showed severe lesions, such as lamellar fusion and necrosis.
Subject(s)
Catfishes/physiology , Environmental Monitoring , Estuaries , Gills/drug effects , Liver/drug effects , Seasons , Water Pollutants, Chemical/toxicity , Animals , Brazil , Catalase/metabolism , Gills/metabolism , Glutathione Transferase/metabolism , Lipid Peroxidation/drug effects , Liver/metabolismABSTRACT
Many Neartic seabirds migrate to South America for the non-breeding season, using several key stopover and wintering sites along the Atlantic coast. The Stercorarius pomarinus is a widely distributed seabird found in every Ocean. It is a migratory bird from northern North America that flies southwards. However, there is little information about the occurrence of Stercorarius pomarinus along the São Paulo State coast. Former publications concerning the birds of Iguape- Cananéia- Ilha Comprida estuary have made no mention of the presence of this bird in the region. Thus it is important that forthcoming appearances be recorded. Throughout the bird-sample selection stage, undertaken since 1998 in the Cananéia estuary (25° 02' 44.71" S and 47° 55' 14.58" W) - 272 km from the city of São Paulo -, the bird was seen for the first time, resting in the Cananéia estuary, in January (2012). This note reports the occurrence of Stercorarius pomarinus in the Cananéia estuary, on the southern coast of São Paulo State, Brazil.
Muitas aves marinhas Neárticas migram para as regiões de invernadas localizadas na América do Sul, utilizando várias rotas e pontos de paradas ao longo da costa do Oceano Atlântico. O mandrião-pomarino é uma ave marinha que migra após a reprodução e pode ser encontrada no Atlântico Sul, entretanto, há poucas informações sobre a ocorrência desta ave o longo da Costa do Estado de São Paulo. Publicações anteriores a respeito da avifauna do estuário de Iguape, Cananéia, Ilha Comprida não fazem menção à presença da Stercorarius pomarinus na área, o que justifica a importância de relatar novos registros desta ocorrência. O registro aqui relatado foi obtido a partir de atividade de monitoramento conduzido desde 1998, no estuário de Cananéia (25° 02' 44.71" S e 47° 55'14.58" W), onde foi realizada a avistagem de dois espécimes de Stercorarius pomarinus em apenas uma oportunidade, no mês de janeiro de 2012, pousadas num banco de areia no meio do estuário.
ABSTRACT
Modeling the distribution patterns of the estuarine macrobenthic community has revealed itself as a difficult task due to spatio-temporal heterogeneity. This study uses ordinary kriging and Poisson modeling to generate distribution maps of the subtidal benthic macrofauna in the Trapandé Bay (southeastern Brazil). Samples were taken in duplicate from 36 locations distributed along nine transects perpendicular to the main estuarine axis in October 2006 and March 2007. One-hundred and seventy taxa belonging to 12 phyla, were identified, with dominance of Annelida Polychaeta. Distribution maps were prepared to illustrate the total density, the number of species and the six most numerous taxa, as well as abiotic parameters. The general distribution pattern has revealed that the greatest number of species and the highest densities are at the estuary mouth, decreasing towards its inner areas. However the temporal and spatial changes observed at the estuary mouth have clearly shown the impact of environmental variations such as nutrients and freshwater input, attributed to increased rainfall in March. The increased flow in the Cananeia Sea, coming from the drainage basin, produces major changes in sediment and faunal composition. Ordinary kriging associated with Poisson modeling has proved to be a powerful and promising tool for modeling the macrofauna, despite the fact that it is not frequently used due to the scarcity of appropriate software.(AU)
Subject(s)
Animals , Benthic Fauna/analysis , Environmental Statistics , Geography/instrumentationABSTRACT
Modeling the distribution patterns of the estuarine macrobenthic community has revealed itself as a difficult task due to spatio-temporal heterogeneity. This study uses ordinary kriging and Poisson modeling to generate distribution maps of the subtidal benthic macrofauna in the Trapandé Bay (southeastern Brazil). Samples were taken in duplicate from 36 locations distributed along nine transects perpendicular to the main estuarine axis in October 2006 and March 2007. One-hundred and seventy taxa belonging to 12 phyla, were identified, with dominance of Annelida Polychaeta. Distribution maps were prepared to illustrate the total density, the number of species and the six most numerous taxa, as well as abiotic parameters. The general distribution pattern has revealed that the greatest number of species and the highest densities are at the estuary mouth, decreasing towards its inner areas. However the temporal and spatial changes observed at the estuary mouth have clearly shown the impact of environmental variations such as nutrients and freshwater input, attributed to increased rainfall in March. The increased flow in the Cananeia Sea, coming from the drainage basin, produces major changes in sediment and faunal composition. Ordinary kriging associated with Poisson modeling has proved to be a powerful and promising tool for modeling the macrofauna, despite the fact that it is not frequently used due to the scarcity of appropriate software.
Subject(s)
Animals , Environmental Statistics , Benthic Fauna/analysis , Geography/instrumentationABSTRACT
Modeling the distribution patterns of the estuarine macrobenthic community has revealed itself as a difficult task due to spatio-temporal heterogeneity. This study uses ordinary kriging and Poisson modeling to generate distribution maps of the subtidal benthic macrofauna in the Trapandé Bay (southeastern Brazil). Samples were taken in duplicate from 36 locations distributed along nine transects perpendicular to the main estuarine axis in October 2006 and March 2007. One-hundred and seventy taxa belonging to 12 phyla, were identified, with dominance of Annelida Polychaeta. Distribution maps were prepared to illustrate the total density, the number of species and the six most numerous taxa, as well as abiotic parameters. The general distribution pattern has revealed that the greatest number of species and the highest densities are at the estuary mouth, decreasing towards its inner areas. However the temporal and spatial changes observed at the estuary mouth have clearly shown the impact of environmental variations such as nutrients and freshwater input, attributed to increased rainfall in March. The increased flow in the Cananeia Sea, coming from the drainage basin, produces major changes in sediment and faunal composition. Ordinary kriging associated with Poisson modeling has proved to be a powerful and promising tool for modeling the macrofauna, despite the fact that it is not frequently used due to the scarcity of appropriate software.
ABSTRACT
Bivalves representam as condições do ambiente em que são cultivadas ostras, sendo portanto vital que esses organismos não estejam contaminados, pois podem representar um risco grave para a saúde pública. Este estudo teve como objetivo avaliar a qualidade microbiológica da água para o cultivo de ostras da Cooperostra (cooperativa de produtor), em Cananeia-SP, Brasil. Os coliformes totais e fecais foram analisados . Os resultados mostraram que a qualidade da água não foi satisfatória, de acordo com a legislação brasileira, exceto por alguns meses. A interferência sazonal foi analisada e uma alta correlação positiva foi verificada, estando a concentração de coliformes baixa no inverno. O índice pluviométrico apresentou correlação alta e positiva para os microrganismos analisados.
Bivalves represent the environment conditions where oysters are farmed, thus is vital that these organisms are not contaminated because they can represent a serious risk to the public health. This study aimed to assess the microbiological quality of water for the cultivation of oysters of Cooperostra (cooperative of producer) in Cananeia-SP, Brazil. The total and fecal coliforms were analyzed. The results showed that water quality were not satisfactory, according to Brazilian legislation, except for some months. The seasonal interference was analysed and a high positive correlation was verified, with low coliforms concentration in winter. The pluviometric index showed a high positive correlation to the microorganisms analysed.
Subject(s)
Humans , Coliforms , Microbiology , Ostreidae , Water , BrazilABSTRACT
Population density in cetaceans can be estimated through photo-identification, mark-recapture, land-based observations and visual estimative. We the aim to contribute with conservation strategies, we used line transects (distance method) to estimate the population density of the river dolphin, S. guianensis, in the estuarine region of Cananéia, Southeastern Brazil. The study, developed from May 2003 until April 2004, during dry and rainy seasons and different times of the day, included a sampling area divided into three sectors according to their proximity to the open sea: Sector I (the closest to the open sea); Sector II (with a large flow of fresh water and a salient declivity); and Sector III (with a large flow of fresh water and non salient declivity). Onboard random sampling was carried out in all three sectors, and dolphins seen from the bow to 90° on both port and starboard sides, were registered along with their position and distance from the boat. The total density found was 12.41ind/km² (CV=25.53%) with an average of 2.2 individuals per group for both periods of the day, morning and afternoon. Densities also varied between dry and rainy seasons, being lower in the first with 5.77ind/km² (CV=27.87%) than in the second 20.28ind/km² (CV=31.95%), respectively. Regarding the three sectors, a non-causal heterogeneous distribution was found: Sector I was the most populated (D=33.10ind/km², CV=13.34%), followed by Sector II (D=7.8ind/km², CV=21.07%) and Sector III (D=3.04ind/km², CV=34.04%). The aforementioned area, due to its proximity to the open sea, has the highest salinity level and therefore has the greatest chance of holding most of the marine fish schools which can be cornered by dolphins on high declivity areas during fishing activities. This suggests that food availability may be the most important factor on the river dolphin’s distribution in the estuary. Similar studies will contribute to a better understanding of these populations and are essential for future conservation strategies. Rev. Biol. Trop. 59 (3): 1275-1284. Epub 2011 September 01.
El delfín estuarino S. guianensis, habita en aguas tropicales costeras y estuarinas. A pesar de su amplia distribución no se conoce suficiente, por lo tanto, recientemente se han intensificado sus estudios poblacionales. Transectos de línea (Método Distancia) fueron utilizados para estimar la densidad de población de S. guianensis en la Bahía Trapandé, región de estuario de Cananéia, Sudeste de Brasil. El muestreo aleatorio se realizó en tres sectores de la bahía desde mayo 2003 hasta abril 2004. La densidad total fue de 12.41ind/km2. Considerando los tres sectores de forma individual, se observó una distribución heterogénea no ocasional: Sector I (más cerca del mar abierto) D=33.10ind/km2; Sector II (que recibe un gran flujo de agua dulce, con un declive más destacado) D=7.80ind/km2; Sector III (que recibe un gran flujo de agua dulce, sin declives salientes) D=3.04ind/km2. Las condiciones ambientales como la estación de lluvias y la estacionalidad diaria, también se observaron en esta bahía. Los resultados mostraron un uso heterogéneo de la zona por los delfines.
Subject(s)
Animals , Dolphins , Brazil , Population Density , SeasonsABSTRACT
Para entender o significado das dietas populacionais são adequados estudos que tratam do histórico das comunidades envolvendo aspectos econômicos, sociais e ambientais. A fim de compreender o atual panorama do sistema alimentar de uma comunidade pesqueira, e propor alternativas para a sua sustentabilidade, o objetivo deste estudo foi identificar as mudanças alimentares ocorridas na comunidade, principalmente ao longo do século XX, e confrontá-las com o histórico sócio-ecológico, identificando também os fatores políticos, econômicos e ambientais. A pesquisa foi desenvolvida junto a uma comunidade pesqueira de Cananéia, município do litoral sul de São Paulo, Brasil. Dentre as principais mudanças, observamos um declínio constante no uso de alimentos locais, acompanhado pelo aumento no consumo de alimentos industrializados. Dos produtos locais, apenas são consumidos os pescados. As carnes de caça, frutas e raízes nativas foram os principais alimentos que deixaram de ser consumidos. Foram identificados quatro principais momentos na história da comunidade que atuaram como marcos para as mudanças mais significativas. Eles são: a crise da agricultura, a intensificação da pesca e urbanização, a adoção do barco a motor na pesca e a intensificação do turismo. Em cada um desses momentos foram encontrados diversos fatores que levaram às mudanças na comunidade, e esta por sua vez, enfrentou algumas fases de transição, se readaptando, após um tempo, a cada nova situação.
In order to better understand population diets, studies that deal with the communities history considering economic, social and environmental aspects, are suitable. Aiming to understand the present food system setting in the studied community and also to put forward proposals to improve its sustainability, the objective in this paper was to identify food changes in a fishing community, mainly throughout the twentieth century, and bring them face to face to its history, identifying the relevant political, economic and environmental factors of relevance. The study was carried out in a fishing community from Cananéia, a municipality in Southern Coast of São Paulo State, Brazil. Among the main changes observed was a constant decrease in the use of local food, simultaneous to an increase in industrialized food consumption. Among the local products only seafood remains frequently consumed. Game and native fruits and roots were important items whose consumption was given up. Four principal historical moments were identified to signal the most expressive changes. They are: the agriculture crisis, intensification of urbanization and fisheries, the adoption of motor boats in fisheries, and increase of tourism. At each of these moments many factors were found that led to feeding changes in the community, and the later, in turn, met some transition stages, adapting to each new situation after some time.
Para entender el significado de las dietas poblacionales son adecuados estudios que tratan de la evolución histórica de las comunidades incluyendo aspectos económicos, sociales y ambientales. Con el fin de comprender el panorama actual de la alimentación en la comunidad estudiada y de proponer alternativas para la sustentabilidad del sistema alimentario local, el objetivo de este estudio fue identificar los cambios en la alimentación ocurridos en la comunidad, principalmente a lo largo del siglo XX, y confrontarlos con su historia, identificando los factores políticos, económicos y ambientales relevantes. El trabajo fue desarrollado en una comunidad pesquera de Cananéia, municipio del litoral Sur de São Paulo, Brasil. Entre los principales cambios se apreció un decrecimiento constante en el uso de alimentos locales, acompañado por el aumento en el consumo de alimentos industrializados. De los productos locales, apenas se consumen los pescados. Las carnes de caza, frutas y raíces nativas fueron los principales alimentos que dejaron de ser consumidos. Se identificaron cuatro momentos principales en la historia de la comunidad que actuaron como marcos para los cambios más significativos. Son ellos la crisis de la agricultura, la intensificación de la pesca y la urbanización, la adopción de la embarcación a motor en la pesca y la intensificación del turismo. En cada un de estos momentos se encontraron diversos factores que llevaron a los cambios en la comunidad, y ésta, por su parte, enfrentó fases de transición, readaptándose después de un tiempo a cada nueva situación.
ABSTRACT
Fifty three individuals of four most commonly consumed fish species by the Cananéia city population, in São Paulo, Brazil, were analyzed to determine total mercury (Total Hg) and methylmercury (MeHg) levels, as well as, proximate composition and fatty acid profile. The muscle of three carnivorous species Centropomus parallelus (Fat snook), Macrodon ancylodon (King weakfish) and Micropogonias furnieri (Whitemouth croaker), and one planktivorous species Mugil platanus (Mullet) were analyzed. MeHg and Total Hg determinations were performed by Cold Vapour Atomic Absorption Spectrometry (CV AAS). Fatty acid profile was determined by gas chromatography (GC)whilst AOAC methods were used for proximate analysis. The total Hg results (interval) in wet weight basis were: Whitemouth croaker (114442 g kg-1), Fat snook (15-178 g kg-1), King weakfish (12-100 g kg-1) and Mullet ( 1025 g kg-1), and none of the fish species exceeded the Brazilian legislation limits. MeHg values were below FAO/WHO (2007) recommendations. In nutritional terms, the results for proximate composition for all four fish species proved to be an excellent protein source with very low lipid content as was expected. Fatty acids of all fish species were adequate. Total polyunsaturated fatty acid contents varied from 21.9% (Micropogonias furnieri) to 26.4% (Mugil platanus). For the n-3 family, Macrodon ancylodon pre
Cinquenta e três amostras de músculo de pescados mais consumidos pela população de Cananéia, foram avaliados em relação aos teores de mercúrio total (HgT) e metilmercúrio (MeHg), composição centesimal e de ácidos graxos. Os músculos de três espécies carnívoras Centropomus parallelus (Robalo Peba), Macrodon ancylodon (Pescada) e Micropogonias furnieri (Corvina), e uma espécie planctívora, Mugil platanus (Tainha) foram analisadas. As determinações de Hg total e MeHg foram feitas por espectrometria de absorção atômica com geração de vapor frio (CV AAS). A composição de ácidos graxos foi determinada por cromatografia a gás (GC) e a composição centesimal, de acordo com as metodologias preconizadas pela AOAC. Os intervalos de concentração obtidos para Hg total (peso úmido)foram: Corvina (114-442 g kg-1), Robalo (15-178 g kg-1), Pescada (12-100 g kg-1) e Tainha ( 10-25 g kg-1), não excedendo os limites da legislação brasileira. Os valores de MeHg se encontraram abaixo das recomendações da FAO/WHO(2007). Em termos nutricionais, os resultados de composição centesimal para todas as espécies analisadas provaram ser uma excelente fonte de proteína com conteúdo muito baixo de lipídeos. Os teores de ácidos graxos poliinsaturados totais variaram de 21,9% (Pescada) a 26,4% (Tainha). Para a família n-3,Macrodon ancylodon apresentou o maior valor (20,9%) e Micropogonias furnieri, o menor
ABSTRACT
Foram avaliados os níveis de contaminação pelos metais pesados Cd, Hg, Pb, Cu e Zn da ostra Crassostrea brasiliana do estuário de Cananéia-SP. Foram feitas amostragens do molusco no período de dezembro de 1996 a setembro de 1997, a partir de lotes destinados à venda, perfazendo um total de 69 amostras. As medianas obtidas para o mercúrio, chumbo, cádmio, cobre e zinco, na base úmida, respectivamente: 0,02;0,08;11;2,6 e 393 mg/kg, encontram-se abaixo dos limites máximos preconizados pela legislação brasileira, exceto para o zinco. Constatou-se que o consumo do produto em questão não apresenta riscos aparentes à saúde, no tocante a este parâmetro específico de qualidade. (AU)
Samples of Mangrove oyster Crassostrea brasiliana from Cananéia estuary, São Paulo-Brazil, were analyzed for heavy metal contamination by flame atomic absorption spectrometry and inductivelycoupled plasma atomic emission spectrometry (ICP OES). 69 samples were collected, from commercialplots, from December of 1996 to September of 1997. The values of the medians, wet weight basis, obtainedfor mercury, lead, cadmium, copper and zinc were respectively: 0.02; 0.08; 0.11; 2.6 and 393 mg/kg. Nosamples analyzed were found in violation of the limits recommended by the Brazilian Food Regulations forfishery products, except for zinc. The consumption of this product can't offer risks to human health,relating to the quality parameter analyzed. (AU)