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Title: Levels and profiles of POPs (organochlorine pesticides, PCBs, and PAHs) in free-ranging common bottlenose dolphins of the Canary Islands, Spain
Authors: García Álvarez, Natalia 
Martel Martín, Vidal
Fernández Rodríguez, Antonio Jesús 
Almunia Portolés, Javier 
Xuriach, Aina
Arbelo Hernández, Manuel Antonio 
Tejedor, Marisa
Domínguez Boada, Luis María 
Zumbado Peña, Manuel Luis 
Pérez Luzardo, Octavio Luis 
UNESCO Clasification: 3214 Toxicología
240111 Patología animal
310907 Patología
240118 Mamíferos
Keywords: Polycyclic Aromatic-Hydrocarbons
Persistent Organic Pollutants
Polychlorinated Biphenyl Exposure
Inorganic Pollutants, et al
Issue Date: 2014
Publisher: 0048-9697
Journal: Science of the Total Environment 
Abstract: The effect of anthropogenic pollution in marine mammals worldwide has become an important issue due to the high concentrations found in many areas. The present study represents the first report of pollutants in free-ranging cetaceans from the Canary Islands, where there are 12 marine Special Areas of Conservation (SACs), because of the presence of bottlenose dolphins (Tursiops truncatus). We selected this resident population of dolphins as a bioindicator to gain knowledge concerning the toxicological status of the cetaceans of this protected area. In 64 biopsy samples of live free-ranging animals sampled from 2003 to 2011, we determined the concentrations of 18 polychlorinated biphenyls (PCBs), 23 organochlorine pesticides (OCPs) and 16 polycyclic aromatic hydrocarbons (PAHs). We found high levels of many of these pollutants, and some of them were detectable in 100% of the samples. The median value for Sigma OCPs was 57,104 ng g(-1) lipid weight (1w), and the dichlorodiphenyldichloroethylene (p,p'-DDE) accounted for 70% of this amount. Among PCBs, congeners 180, 153 and 138 were predominant (82% of Sigma PCBs; median = 30,783 ng g(-1) lw). Concerning the analyzed PAHs, the total median burden was 13,598 ng g(-1) lw, and phenanthrene was the compound measured at the highest concentration followed by pyrene and by naphthalene. Surprisingly, we have found that organohalogen pollutants exhibit an upward trend in recent years of sampling. Thus, according to the guidelines outlined in the EU's Marine Strategy Framework Directive, further monitoring studies in Canary Islands are required to contribute to the conservation of the resident populations of marine mammals in this region.
ISSN: 0048-9697
DOI: 10.1016/j.scitotenv.2014.05.125
Source: Science of the Total Environment [ISSN 0048-9697], v. 493, p. 22-31
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