title: Geographical distribution and time trends of polychlorinated biphenyls in raft mussel from Galician coast (1998-2013).
abstract: PCBs were analyzed in raft mussels cultured in several polygons from Galician Rías (Rías of Ares-Betanzos, Muros-Noia, Arousa, Pontevedra and Vigo) during the period 1998-2013. The main aim of this work is study the quality of culture marine environment in relation to PCBs compounds. We report the results of a monitoring. The mean levels of ΣPCBs (ten congeners) ranged from 7.41 to 59.50ngg(-1)dw. The isomer concentrations in the Mytilus galloprovincialis cultured in raft were in the order hexachlorobiphenyls>pentachlorobiphenyls>tetrachlorbiphenyls>trichlorobiphenyls. Some biological parameters of mussel were also investigated (shell length, lipid content and condition index) in order to know their influence on ability of PCBs accumulation. ANOVA analysis confirms that levels of most of congeners had a significant relation (p<0.05) with shell length. The geographical patterns and temporal variations of PCBs were also investigated. Principal Component Analysis (PCA) showed differences between geographic areas (Rías) in the distribution of PCBs levels. Samples coming from Rías of Vigo and Ares-Betanzos presented the highest levels of PCBs and samples from Rías of Arousa and Muros-Noia had the lowest levels of these compounds. Time trends (linear regressions) showed a decline of levels of PCB congeners along the period 1998-2013.
authors: Instituto Tecnolóxico para o Control do Medio Mariño de Galicia, INTECMAR, Consellería do Medio Rural e do Mar, Xunta de Galicia, Peirao de Vilaxoán s/n, 36611 Vilagarcía de Arousa, Spain. Electronic address: ncarro@intecmar.org.
authors: Nieves
authors: N
authors: Carro
authors: Instituto Tecnolóxico para o Control do Medio Mariño de Galicia, INTECMAR, Consellería do Medio Rural e do Mar, Xunta de Galicia, Peirao de Vilaxoán s/n, 36611 Vilagarcía de Arousa, Spain.
authors: Isabel
authors: I
authors: García
authors: Instituto Tecnolóxico para o Control do Medio Mariño de Galicia, INTECMAR, Consellería do Medio Rural e do Mar, Xunta de Galicia, Peirao de Vilaxoán s/n, 36611 Vilagarcía de Arousa, Spain.
authors: María
authors: M
authors: Ignacio
authors: Instituto Tecnolóxico para o Control do Medio Mariño de Galicia, INTECMAR, Consellería do Medio Rural e do Mar, Xunta de Galicia, Peirao de Vilaxoán s/n, 36611 Vilagarcía de Arousa, Spain.
authors: Ana
authors: A
authors: Mouteira
mesh_terms: D000818:Animals; D004784:Environmental Monitoring; D049878:Mytilus / Q000378:metabolism*; D011078:Polychlorinated Biphenyls / Q000378:metabolism*; D025341:Principal Component Analysis; D013030:Spain; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D014874:Water Pollutants, Chemical; D011078:Polychlorinated Biphenyls
keywords: Galician Rías; Geographical distribution; PCBs; Raft mussel; Time trends