Document Detail

Organochlorine concentrations declined during 1987-2002 in western Mediterranean bottlenose dolphins, a coastal top predator.
MedLine Citation:
PMID:  16766014     Owner:  NLM     Status:  MEDLINE    
We collected blubber samples from bottlenose dolphins stranded on Spain's Mediterranean coasts over a 25-year period (1978-2002). Samples were analyzed to determine time trends in levels of: HCB (hexachlorobenzene), PCB (polychlorinated biphenyls) and tDDT (dichlorodiphenyltrichloroethane and its metabolites). Overall, levels were high relative to other areas. This reflects both the ubiquity of organochlorine pollution in the western Mediterranean and the sampled species' coastal habit. There was a significant decline over the study period in the concentrations of all the compounds analyzed. However, the DDE/tDDT, which is indicative of DDT ageing, significantly increased. This suggests there has been no significant use of HCB, DDT or PCB in the region for a long time. It also indicates that the pollutant loads in the environment are gradually being reduced; either by degradation or by migration of the compounds to other regions. A comparison with dolphin species that have an oceanic distribution suggests that PCB decline at a comparable pace in coastal and offshore water bodies. However, the decline of tDDT is faster near the coast.
A Borrell; A Aguilar
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2006-06-12
Journal Detail:
Title:  Chemosphere     Volume:  66     ISSN:  0045-6535     ISO Abbreviation:  Chemosphere     Publication Date:  2007 Jan 
Date Detail:
Created Date:  2006-11-27     Completed Date:  2007-04-02     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0320657     Medline TA:  Chemosphere     Country:  England    
Other Details:
Languages:  eng     Pagination:  347-52     Citation Subset:  IM    
Department of Animal Biology, University of Barcelona, C/Diagonal 645 6a planta, 08071 Barcelona, Spain.
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MeSH Terms
Bottle-Nosed Dolphin / metabolism*
DDT / analysis,  metabolism
Dichlorodiphenyl Dichloroethylene / analysis,  metabolism
Environmental Monitoring / methods
Hexachlorobenzene / analysis,  metabolism
Hydrocarbons, Chlorinated / analysis*,  metabolism
Mediterranean Sea
Polychlorinated Biphenyls / analysis,  metabolism
Water Pollutants, Chemical / analysis,  metabolism
Water Pollution / analysis*
Reg. No./Substance:
0/Hydrocarbons, Chlorinated; 0/Polychlorinated Biphenyls; 0/Water Pollutants, Chemical; 118-74-1/Hexachlorobenzene; 50-29-3/DDT; 72-55-9/Dichlorodiphenyl Dichloroethylene

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