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Distribution and Spatial Trends of PCBs in Commercial Scallops from Galician Littoral (NW, Spain). Possible Influence of Biometric Parameters

Authors

  • N. Carro,

    1. Authors are with Inst. Tecnolóxico para o Control do Medio Mariño de Galicia, INTECMAR, Consellería do Mar, Xunta de Galicia, Peirao de Vilaxoán s/n, 36611 Vilagarcía de Arousa, Spain.Direct inquiries to author Carro (E-mail: ncarro@intecmar.org).
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  • I. García,

    1. Authors are with Inst. Tecnolóxico para o Control do Medio Mariño de Galicia, INTECMAR, Consellería do Mar, Xunta de Galicia, Peirao de Vilaxoán s/n, 36611 Vilagarcía de Arousa, Spain.Direct inquiries to author Carro (E-mail: ncarro@intecmar.org).
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  • M. Ignacio,

    1. Authors are with Inst. Tecnolóxico para o Control do Medio Mariño de Galicia, INTECMAR, Consellería do Mar, Xunta de Galicia, Peirao de Vilaxoán s/n, 36611 Vilagarcía de Arousa, Spain.Direct inquiries to author Carro (E-mail: ncarro@intecmar.org).
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  • A. Mouteira

    1. Authors are with Inst. Tecnolóxico para o Control do Medio Mariño de Galicia, INTECMAR, Consellería do Mar, Xunta de Galicia, Peirao de Vilaxoán s/n, 36611 Vilagarcía de Arousa, Spain.Direct inquiries to author Carro (E-mail: ncarro@intecmar.org).
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Abstract

Abstract:  Levels and profiles of 10 individual congeners of polychlorinated biphenyls (PCBs) were studied in 3 species of commercial scallops (Pecten maximus, Chlamys varia, and Chlamys opercularis) from several Rías in Galician littoral (NW, Spain). ΣPCBs levels ranged from 2.21 to 41.0 ng/g wet weight for P. maximus, from 13.9 to 24.9 ng/g wet weight for C. varia, and from 1.58 to 24.3 ng/g wet weight for C. opercularis. The possible influence between biometric parameters (lipid content, condition index, and shell size) and PCBs levels were studied using statistical analysis (ANOVA). No relationship between biometric parameters could be established in the studied samples. Multivariate analysis showed there were differences in bioaccumulation of some PCBs congeners. Principal component analysis classifies clearly the 3 studied Rías (Ría de Ferrol, Ría de Arousa, and Ría de Vigo) taking into account PCBs levels found in the shellfish.

Practical Applications:  We investigated levels and profiles of 10 congeners of PCBs in 3 commercial scallop species from the Galician littoral zone. The influence of 3 biometric parameters on polychlorinated biphenyls (PCBs) levels was also studied in order to assess results from the monitoring programs of production areas. According to PCBs levels, geographical differences were observed in commercial scallops from the 3 studied estuarine bays (Ría de Ferrol, Ría de Arousa, and Ría de Vigo).

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