Dietary uptake of dioxins (PCDD/PCDFs) and dioxin-like PCBs in Spanish aquacultured turbot (Psetta maxima)

• Published in: Food Additives and Contaminants
• Language: English
• Published: Taylor & Francis 2011
• Subjects: Life Sciences; Blanco; Gonzalez; Sonia; Chini; Porro; Turbot
• Online Access: http://hdl.handle.net/2262/53569; https://doi.org/10.1080/02652030601064821

Abstract Human population is exposed to dioxins (PCDD/Fs) and dioxin-like polychlorinated biphenyls (dl-PCBs) mainly through diet; bioaccumulation and biomagnification in aquatic environment results in fishery products and by-products being an important vector to humans. Determinations of PCDD/Fs and dl-PCBs in fillets of young turbots (Psetta maxima) (0 ? 2 years) from aquaculture plant (Galicia, Spain) (N = 21) and in feeding stuffs were carried out, and dietary accumulation values and lipid-normalized biomagnification factors (BMF) relating concentration in fish and in feed were calculated. Levels found in feeding stuffs (0.5 pg TEQ-PCDD/F / g and 1.6 pg TEQ-dl-PCB / g), and turbots (0.13 - 0.27 pg TEQ-PCDD/F / g fresh weight and 0.35 - 1.2 pg TEQ-dl-PCB / g fresh weight) were below maximum permitted levels set by EC. Levels of toxic compounds in feeding stuff are reflected in fish fillets; predominant isomers are 2,3,7,8-TCDF, OCDD, 1,2,3,7,8-PeCDF, 2,3,4,7,8-PeCDF and 1,2,3,4,6,7,8-HpCDD, and PCBs 118, 105, 156 and 167. Relevant compounds accounting for total toxicity are the same congeners in feeding stuff and turbots: 2,3,4,7,8- PeCDF; 2,3,7,8-TCDF; 2,3,7,8-TCDD and 1,2,3,7,8-PeCDD, and PCB 126. Higher accumulation efficiency values were obtained for dl-PCBs (30 - 46%); tetra- and penta-chloro substituted PCDD/Fs showed the highest values (27 - 34%) of the PCDD/F group. Biomagnification was shown for these compounds (BMF around 1.5). : Vieites, Juan Manuel, [e-mail] merged with this user on 08-May-2008 by Haire, Lynsey (Vieites, Juan Manuel) [e-mail] (Blanco, Sonia Lucia) [e-mail] (Sobrado, Cristina) [e-mail] (Porro, Corina) [e-mail] (Cabaleiro, Santiago) [e-mail] (Gonzalez, Jose Carlos) [e-mail] (Vieites, Juan Manuel) Centro Tecnico Nacional de Conservacion de Productos de la Pesca (ANFACO-CECOPESCA), Calidad y Seguridad Alimentaria - Vigo - SPAIN (Blanco, Sonia Lucia) Centro Tecnico Nacional de Conservacion de Productos de la Pesca (ANFACO-CECOPESCA), Calidad y Seguridad Alimentaria - Vigo - SPAIN (Sobrado, Cristina) ANFACO-CECOPESCA, Quality and Food Safety Area - Vigo - SPAIN (Porro, Corina) Centro Tecnico Nacional de Conservacion de Productos de la Pesca (ANFACO-CECOPESCA), Calidad y Seguridad Alimentaria - Vigo - SPAIN (Porro, Corina) Centro Tecnologico de la Acuicultura de Galicia (CETGA) - Agui?o - SPAIN (Cabaleiro, Santiago) Centro Tecnico Nacional de Conservacion de Productos de la Pesca (ANFACO-CECOPESCA), Calidad y Seguridad Alimentaria - Vigo - SPAIN (Gonzalez, Jose Carlos) Centro Tecnico Nacional de Conservacion de Productos de la Pesca (ANFACO-CECOPESCA), Calidad y Seguridad Alimentaria - Vigo - SPAIN (Vieites, Juan Manuel) Vigo - SPAIN (Vieites, Juan Manuel) SPAIN