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Title: | Trace elements and microbiological parameters in farmed Nile tilapia with emphasis on muscle, water, sediment and feed |
Authors: | Steckert, Lilian Dordete Furtado, William Eduardo Jerônimo, Gabriela Tomas Pereira, Scheila Anelise Jesus, G. F.A. Mouriño, José Luiz Pedreira Martins, Maurício Laterça |
Keywords: | Arsenic Bacteria Benchmarking Contamination Energy Dispersive Spectroscopy Fish Health Risks Inductively Coupled Plasma Lakes Laws And Legislation Mass Spectrometers Microbiology Muscle Quality Control Radioactive Elements Risk Assessment Sediments Tanks (containers) Trace Elements Water Atomic Absorption Spectrometers Energy Dispersion X-ray Fluorescence Fish Farming Inductively Coupled Plasma Mass Spectrometer Micro-biological Parameters Optical Emission Spectrometer Potentially Toxic Elements Trace Elements Concentration Water Pollution Arsenic Benchmarking Bioaccumulation Bioindicator Cichlid Concentration (composition) Fecal Coliform Fish Culture Food Chain Mass Spectrometry Microbiology Muscle Parameter Estimation Sediment Pollution Trace Element Water Pollution X ray fluorescence Animalsia Oreochromis Niloticus Pseudomonas Tilapia Vibrio Arsenic Mercury Trace Element Analysis Animals Animals Food Aquaculture Atomic Absorption Spectrometry Chemistry Cichlid Fish Product Microbiology Pond Sediment Muscle, Skeletal Water Pollutant Animals Feed Animal Aquaculture Arsenic Cichlids Fish Products Geologic Sediments Mercury Muscle, Skeletal Ponds Spectrophotometry, Atomic Trace Elements Water Pollutants, Chemical |
Issue Date: | 2019 |
metadata.dc.publisher.journal: | Journal of Environmental Science and Health - Part B Pesticides, Food Contaminants, and Agricultural Wastes |
metadata.dc.relation.ispartof: | Volume 54, Número 4, Pags. 237-246 |
Abstract: | Fish may bioaccumulate contaminants from the aquatic environment and extend them to the food chain provoking risks to human health. This study evaluated the microbiological parameters of the pond´s water and trace elements concentrations in samples of water, sediment, feed and muscle of farmed Nile tilapia used for human consumption in southern Brazil. A total of 240 fish were collected from 12 tilapia farms. Sediment, tank water and dry ration used in the animals' diet were collected for analysis. Analysis were performed by Energy Dispersion X-ray Fluorescence (EDXRF), Inductively Coupled Plasma Mass Spectrometer (ICP-MS), Induced Coupled Plasma Optical Emission Spectrometer (ICP-OES), and Atomic Absorption Spectrometer (AAS-VGA). In addition, the microbiological analysis of the water was carried out. The concentrations of Se, I, Fe, Cu and Zn in fish muscle were higher than the recommended by the Brazilian legislation, considering the advised daily intake for adults. The arsenic element had concentrations above the limit stipulated by the present Brazilian legislation, observed in all samples of muscle, sediment and tank water highlighting a possible environmental and fish contamination by the toxic element. Moreover, the arsenic concentration in the water presented a positive correlation (ρ = 0.33) with arsenic in the muscle, suggesting that tilapia is a good environmental bioindicator, once they properly reflect the levels of arsenic in the water. It is suggested to perform an arsenic speciation for quantification of the inorganic form and accurate assessment of the degree of toxicity in the muscle samples and risks it can bring to human health. Regarding the other potentially toxic elements (Hg, Pb and Cd), and microbiological analysis of water it was verified that the consumption of the fish in question does not raise risks, since the values are within a quality benchmark established by law. The concentration of total and fecal coliforms in pond´s water in the facilities was in agreement with the microbiological indexes required by the legislation of CONAMA class II. Western region presented the lowest concentrations of fecal coliforms when compared to the other regions. There was no significant difference in the microbiological counts of total heterotrophic bacteria, Vibrio spp. and Pseudomonas spp. among the regions. © 2018, © 2018 Taylor & Francis Group, LLC. |
metadata.dc.identifier.doi: | 10.1080/03601234.2018.1550308 |
Appears in Collections: | Artigos |
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