Levels and distribution pattern of polychlorinated biphenyl (PCB) congeners in razor clams Ensis siliqua (Linnaeus, 1758) from Galicia (north-west Spain) in relation to biometric parameters.
To establish polychlorinated biphenyl (PCB) levels and distribution as well as their relationship to biometric parameters in the razor clam Ensis siliqua (Linnaeus, 1758), 15 individual samples collected from two points sited in the Islas Cies, Ría de Vigo in Galicia, Spain, collected monthly between February 2003 and April 2004, were analysed. PCBs (IUPAC No. 31, 28, 52, 101, 118, 153, 105, 138, 156 and 180) were isolated by Soxhlet extraction. Identification and quantification were performed by gas chromatography-mass spectrometry (GC/MS) and gas chromatography (electron capture detector), respectively. The isomer concentrations in E. siliqua were in the order hexachlorobiphenyls > pentachlorobiphenyls > heptachlorobiphenyls > trichlorobiphenyls > tetrachlorbiphenyls. No correlation was observed between the E. siliqua shell length and PCBs levels. The PCBs 31, 101, 105 and 153 levels were statistically related with some biometric parameters (p < 0.05). Multivariate techniques such as principal component analysis (PCA) show clear seasonal differences between samples.
Carro
N
N
INTECMAR (Instituto Tecnológico para el Control del Medio Marino de Galicia), Consellería de Pesca e Asuntos Marítimos, Xunta de Galicia Pierao de Vilaxoán s/n, 36611, Vilagarcía de Arousa, Spain. ncarro@intecmar.org
García
I
I
Ignacio
M
M
Mouteira
A
A
D000818:Animals; D049872:Bivalvia; D004785:Environmental Pollutants / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry; D015999:Multivariate Analysis; D011078:Polychlorinated Biphenyls / Q000032:analysis*; D012621:Seasons; D012758:Shellfish / Q000032:analysis*; D013030:Spain
D004785:Environmental Pollutants; D011078:Polychlorinated Biphenyls