Effects of fish oil replacement and re-feeding on the bioaccumulation of organochlorine compounds in gilthead sea bream ( Sparus aurata L.) of market size

• Published in: Chemosphere (Oxford) Vol. 76; no. 6; pp. 811 - 817
• Main Authors: Nácher-Mestre, Jaime, Serrano, Roque, Benedito-Palos, Laura, Navarro, Juan C., López, Francisco J., Pérez-Sánchez, Jaume
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.08.2009; Elsevier
• Subjects: Animals; Applied sciences; Aquaculture; Bioaccumulation; biodegradation; brominated phenols; bromophenols; Contaminants; Coriolus versicolor; Diets; enzyme activity; Exact sciences and technology; feed contamination; Fillets; Fish; Fish feed; fish feeding; fish fillets; fish oils; Fish Oils - analysis; Fish Oils - chemistry; food contamination; Food Contamination - analysis; human food chain; Hydrocarbons, Chlorinated - analysis; Hydrocarbons, Chlorinated - chemistry; laccase; Marine aquaculture; organobromine compounds; Organochlorine compounds; organochlorine pesticides; pesticide residues; Pesticides - analysis; Pesticides - chemistry; phenols; Pollution; polychlorinated biphenyls; Polychlorinated Biphenyls - analysis; Polychlorinated Biphenyls - chemistry; Raw materials; Sea Bream; Sparus aurata; vegetable oil; Vegetable oils; Sparus aurata; Marine aquaculture; Organochlorine compounds; Bioaccumulation; Fish feed; Edible species; Pesticides; Polychlorobiphenyls; Raw materials; Optimization; Persistent organic pollutant; Trophic chain; Pollution; Halogenated hydrocarbon; Chlorine Organic compounds; Chlorocarbon; Biological accumulation; Organic compounds; Aquaculture
• ISSN: 0045-6535; 1879-1298
• DOI: 10.1016/j.chemosphere.2009.04.046

Organochlorine pesticide residues and polychlorinated biphenyls were determined in raw materials, fish feeds and fillets from fish exposed through the productive cycle (14 months) to experimental diets with different percentages of fish oil replacement with vegetable oils. Detectable amounts of organochlorine compounds were found in raw materials derived from fish sources with none being detected in vegetable ingredients. Fish feeds presented trace concentrations of contaminants at the ng/g level, which varied according to the contribution of the different resources used in their manufacture. Contaminants did not accumulate during the first 11 months of exposure, and low concentrations of organochlorine compounds were found both at the start and at the end of this feeding period. Fillets from fish fed the fish oil diet presented the highest concentrations of organochlorine compounds, with these decreasing in proportion to fish oil replacement. Three months of fish oil re-feeding during the finishing phase only produced significant bioaccumulation over the course of the first month. By optimizing fish meal and fish oil replacement with vegetable oils alternative feeds can contribute to significantly reduce the risk of organochlorine uptake by consumers.