MARCOS ANTONIO HORTELLANI
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Artigo IPEN-doc 25809 Organotropism of total mercury (THg) in Cichla pinima, ecological aspects and human consumption in fish from Amazon region, Brazil2019 - AZEVEDO, JULIANA de S.; HORTELLANI, MARCOS A.; SARKIS, JORGE E. de S.Specimens of the Cichla pinima are of ecological and economic importance in the Amazon region and are a good bioindicator species of Hg bioaccumulation. Adult specimens of Cichla pinima were obtained by fisheries in the Tapajós river region’s impacted gold mining area. Tissues such as muscle, liver, skin, and gill were submitted for total mercury (THg) analysis. For hepatic bioavailability, assays were carried out in the whole liver and in the sub-cellular hepatic fraction. The weight–length relationship showed an equation ofW= 2E− 06L3.3002 (R2 = 0.856) indicating an allometric growth. The mean THg values found in the muscle tissue of 676 ± 258 μg kg−1 were below the maximum limit established for human consumption, but were similar to Cichla fish from other areas impacted by Hg in the Amazon region. The trends of levels in the tissues were as follows: liver>muscle>gonads>skin>gill, with no significant differences between the gills and skin. A significant and positive correlation as rs = 0.65 was obtained between the THg contents in cytosolic fraction and the total hepatic THg (liver homogenate). However, only 7% of the THg were found and were available to the sub-cellular hepatic fraction. This profile can be an indicative of a hepatic cellular transference in fish exposed to high Hg levels in the Amazon region now that low concentrations of Hg have been found in the sub-cellular fraction. However, data of differential THg partition in the subcellular compartments should be considered, since others’ hepatic fractions can act in the Hg linkage into the cell.Artigo IPEN-doc 23182 Effects of harbor activities on sediment quality in a semi-arid region in Brazil2017 - MOREIRA, LUCAS B.; CASTRO, ITALO B.; HORTELLANI, MARCOS A.; SASAKI, SILVIO T.; TANIGUCHI, SATIE; PETTI, MONICA A.V.; FILLMANN, GILBERTO; SARKIS, JORGE E.S.; BICEGO, MARCIA C.; COSTA-LOTUFO, LETICIA V.; ABESSA, DENIS M.S.Tropical marine environments are rich in biodiversity and the presence of harbor activities in these areas can harm the coastal ecosystems. In this study, we assessed sediment quality of two harbors from a tropical region in Brazil by applying multiple lines-of-evidence approach. This approach included the integration of results on: (1) grain size, organic matter, organic carbon, nitrogen, phosphorus, trace metals, polycyclic aromatic hydrocarbons, linear alkylbenzenes, and tributyltin; (2) acute toxicity of whole sediments and chronic toxicity of liquid phases; and (3) benthic community descriptors. Our results revealed that the main contaminants detected in sediments from Mucuripe and Pecém Harbors were chromium, copper, nitrogen, zinc, and tributyltin. These toxicants arise from typical harbor activities. However, the changes in benthic composition and structure appear to depend on a combination of physical impacts, such as the deposition of fine sediments and the toxic potential of contaminants, especially in Mucuripe. Thus, apart from toxicants physical processes are important in describing risks. This information may assist in management and conservation of marine coastal areas.Artigo IPEN-doc 21220 An environmental forensic approach for tropical estuaries base on metal bioaccumulation in tissues of Callinectes danae2016 - BORDON, ISABELLA C.A.C.; SARKIS, JORGE E.S.; ANDRADE, NATHALIA P.; HORTELLANI, M.A.; FAVARO, DEBORAH I.T.; KAKAZU, MAURICIO H.; COTRIM, MARYCEL E.B.; LAVRADAS, RAQUEL T.; MOREIRA, ISABEL; SAINT'PIERRE, TATIANA D.; HAUSER-DAVIS, RACHEL A.The blue crab Callinectes danae is distributed throughout the Atlantic coast and this study aimed to evaluate a environmental forensics approach that could be applied at tropical estuarine systems where this species is distributed, based on the metal concentrations in its tissues. For this purpose, blue crab samples were collected in 9 sites (distributed in 3 areas) along the Santos Estuarine System, state of Sa˜o Paulo, Brazil. The concentrations of Al, Cd, Co, Cr, Cu, Fe, Hg, Mn, Ni, Pb and Zn were determined in gills, hepatopancreas and muscle tissues. Sediment samples were collected and analyzed in these same sites. A data distribution pattern was identified during both sampling periods (August and December 2011). In order to validate this model, a new sampling campaign was performed in March 2013 at the Santos Estuarine System and also at Ilha Grande (state of Rio de Janeiro). These data were added to the previous database (composed of the August and December 2011 samples) and a discriminant analysis was applied. The results confirmed an environmental fingerprint for the Santos Estuarine System.