Reference : Spatial variation in the accumulation of POPs and mercury in bottlenose dolphins of t...
Scientific journals : Article
Life sciences : Environmental sciences & ecology
Life sciences : Aquatic sciences & oceanology
http://hdl.handle.net/2268/202305
Spatial variation in the accumulation of POPs and mercury in bottlenose dolphins of the Lower Florida Keys and the coastal Everglades (South Florida)
English
Damseaux, France mailto [Université de Liège > Département de Biologie, Ecologie et Evolution > Océanographie biologique >]
Kiszka, J. [> >]
Heithaus, M.R. [> >]
Scholl, Georges mailto [Université de Liège > Département de chimie (sciences) > Center for Analytical Research and Technology (CART) >]
Eppe, Gauthier mailto [Université de Liège > Département de chimie (sciences) > Chimie analytique inorganique >]
Thomé, Jean-Pierre mailto [Université de Liège > Département de Biologie, Ecologie et Evolution > Ecologie animale et écotoxicologie >]
Lewis, J. [> >]
Hao, Wensi [> >]
Fontaine, M.C. [> >]
Das, Krishna mailto [Université de Liège > Département de Biologie, Ecologie et Evolution > Océanographie biologique >]
Jan-2017
Environmental Pollution
Elsevier Science
220
577-587
Yes (verified by ORBi)
International
0269-7491
Oxford
United Kingdom
[en] Tursiops truncatus ; mercury ; OHCs ; Dioxin-like compounds ; South Florida ; pollutants ; marine mammals
[en] The bottlenose dolphin (Tursiops truncatus) is an upper trophic level predator and the most common cetacean species found in nearshore waters of southern Florida, including the Lower Florida Keys (LFK) and the Florida Coastal Everglades (FCE). The objective of this study was to assess contamination levels of total mercury (T-Hg) in skin and persistent organic pollutants (PCBs, PBDEs, DDXs, HCHs, HCB, Σ PCDD/Fs and Σ DL-PCBs) in blubber samples of bottlenose dolphins from LFK (n = 27) and FCE (n = 24). PCBs were the major class of compounds found in bottlenose dolphin blubber and were higher in individuals from LFK (Σ 6 PCBs LFK males: 13421 ± 7730 ng.g-1 lipids, Σ 6 PCBs LFK females: 9683 ± 19007 ng.g-1 lipids) than from FCE (Σ 6 PCBs FCE males: 5638 ng.g-1 ± 3627 lipids, Σ 6 PCBs FCE females: 1427 ± 908 ng.g-1 lipids). These levels were lower than previously published data from the southeastern USA. The Σ DL-PCBs were the most prevalent pollutants of dioxin and dioxin like compounds (Σ DL-PCBs LFK: 739 ng.g-1 lipids, Σ DL-PCBs FCE: 183 ng.g-1 lipids) since PCDD/F concentrations were low for both locations (mean 0.1 ng.g-1 lipids for LFK and FCE dolphins). The toxicity equivalences of PCDD/Fs and DL-PCBs expressed as TEQ in LFK and FCE dolphins is mainly expressed by DL-PCBs (81% LFK - 65% FCE). T-Hg concentrations in skin were significantly higher in FCE (FCE median 9314 ng.g-1 dw) compared to LFK dolphins (LFK median 2941 ng.g-1 dw). These bottlenose dolphins concentrations are the highest recorded in the southeastern USA, and may be explained, at least partially, by the biogeochemistry of the Everglades and mangrove sedimentary habitats that create favourable conditions for the retention of mercury and make it available at high concentrations for aquatic predators.
Centre Interfacultaire de Recherches en Océanologie - MARE
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS ; This work was supported by the National Science Foundation to the Florida Coastal Everglades LTER Program (DBI0620409, DEB9910514, DRL0959026); and Florida International University’s Marine Sciences Program
http://hdl.handle.net/2268/202305
10.1016/j.envpol.2016.10.005
http://reflexions.ulg.ac.be/en/dolphinswhalespollution

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