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Franciscana dolphins as PCBs marine biomonitors in Argentina, south-west Atlantic Ocean

Published online by Cambridge University Press:  22 June 2015

Andrés H. Arias ,
María V. Panebianco ,
Sopheak Net ,
David Dumoulin ,
Sami Souissi ,
Baghdad Ouddane ,
Humberto L. Cappozzo  and
Jorge E. Marcovecchio
Andrés H. Arias*
Affiliation:
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. Rivadavia 1917 (C1033AAJ), Ciudad de Buenos Aires, Argentina Área de Oceanografía Química, Instituto Argentino de Oceanografía (IADO-CONICET-UNS), Florida 8000 (Camino La Carrindanga km 7.5), B8000FWB, Bahía Blanca, Argentina Universidad Nacional del Sur, Alem 1253, CP 8000, Bahia Blanca, Argentina
María V. Panebianco
Affiliation:
Museo Argentino de Ciencias Naturales “Bernardino Rivadavia” (MACN-CONICET), División Mastozoología, Av. Ángel Gallardo 479 (C1405DJR), Cuidad de Buenos Aires, Argentina Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimonides, Hidalgo 775 (C1405BDB), 7mo piso, Cuidad de Buenos Aires, Argentina Fundación de Historia Natural Félix de Azara, Universidad Maimonides, Hidalgo 775 (C1405BDB), 7mo piso, Cuidad de Buenos Aires, Argentina
Sopheak Net
Affiliation:
Laboratory of Analytical and Marine Chemistry, University of Sciences and Technology of Lille 1, Bât. C8, 59650 Villeneuve d'Ascq Cedex, France
David Dumoulin
Affiliation:
Laboratory of Analytical and Marine Chemistry, University of Sciences and Technology of Lille 1, Bât. C8, 59650 Villeneuve d'Ascq Cedex, France
Sami Souissi
Affiliation:
Station Marine, 28 avenue Foch, BP 80, 62930 Wimereux, France
Baghdad Ouddane
Affiliation:
Laboratory of Analytical and Marine Chemistry, University of Sciences and Technology of Lille 1, Bât. C8, 59650 Villeneuve d'Ascq Cedex, France
Humberto L. Cappozzo
Affiliation:
Universidad Nacional del Sur, Alem 1253, CP 8000, Bahia Blanca, Argentina Museo Argentino de Ciencias Naturales “Bernardino Rivadavia” (MACN-CONICET), División Mastozoología, Av. Ángel Gallardo 479 (C1405DJR), Cuidad de Buenos Aires, Argentina Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimonides, Hidalgo 775 (C1405BDB), 7mo piso, Cuidad de Buenos Aires, Argentina
Jorge E. Marcovecchio
Affiliation:
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. Rivadavia 1917 (C1033AAJ), Ciudad de Buenos Aires, Argentina Área de Oceanografía Química, Instituto Argentino de Oceanografía (IADO-CONICET-UNS), Florida 8000 (Camino La Carrindanga km 7.5), B8000FWB, Bahía Blanca, Argentina Universidad de la Fraternidad de Agrupaciones Santo Tomás de Aquino (FASTA), Gascón 3145, (7600), Mar del Plata, Argentina
*
Correspondence should be addressed to:A.H. Arias, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. Rivadavia 1917 (C1033AAJ), Ciudad de Buenos Aires, Argentina email: aharias@iado-conicet.gov.ar
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Abstract

Including a multi-year collection of samples (2004–2011) the present research fills 20 years of an information gap regarding the PCB burden in south-west Atlantic franciscana dolphins (Pontoporia blainvillei) while aiming to test the null hypothesis that PCBs congeners are increasingly bioaccumulating in south-west Atlantic specimens in relation to northern hemisphere records. In addition, the present survey analyses indicators of potential biological impairment associated to PCBs tissue burden. The results could associate each sampling area group of dolphins to one or two Aroclor® patterns and point to dominant regional diffuse sources entering PCBs mixtures to the marine environment with a possible regional/long-range atmospheric contribution. In addition, total PCB levels were from four to seven times lower than the closer precedents for the area (18–26 years ago) indicating a progress in the environmental release and biota exposure of PCBs and posing an objective indicator of success of the present international elimination programme. Further, when compared with regional and global bioaccumulation patterns, PCBs congeners in Argentinean specimens appeared to occur in a decreasing tendency. Finally, calculated TEQs TCDD levels raised a concern in regards to environmental safety, showing guideline values to be widely exceeded and the occasional occurrence of positive correlations between PCBs bioaccumulation vs. sexual immaturity.

Keywords

Franciscanasdolphinssouth-western AtlanticArgentinaPCBsbiomonitors
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 96 , Issue 4: Marine Mammals , June 2016 , pp. 979 - 992
Copyright
Copyright © Marine Biological Association of the United Kingdom 2015 

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