Document Detail


Concentrations of heavy metals in Sotalia fluviatilis (Cetacea: Delphinidae) off the coast of Ceará, northeast Brazil.
MedLine Citation:
PMID:  12628211     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Lead (Pb), cadmium (Cd) and mercury (Hg) concentrations on liver and kidney of Sotalia fluviatilis (Cetacea: Delphinidae) stranded in the coast of Ceará, Brazil, were studied from 1996 to 1999. Pb levels were usually lower than the detection limit (0.1 microg/g). Concentrations of Cd were significantly higher in kidney than liver, averaging 0.8 microg/g. Mercury accumulation took place mainly in liver with an average concentration of 4.6 microg/g. Both metals were significantly higher in larger mature individuals, but differences between sexes were not significant. The detection of Cd, Hg and Pb in tissue samples of S. fluviatilis off the coast of Ceará indicated that heavy metals are locally available in the water, and bioaccumulation may be occurring through the food web. Contamination levels were not considered critical, but could be related to Ceará's growing industrial development. The associated risks of pollution outfalls may pose a threat to marine organisms in a near future, especially for top predators such as S. fluviatilis.
Authors:
Cassiano Monteiro-Neto; Renata Vinhas Itavo; Luiz Eduardo de Souza Moraes
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Environmental pollution (Barking, Essex : 1987)     Volume:  123     ISSN:  0269-7491     ISO Abbreviation:  Environ. Pollut.     Publication Date:  2003  
Date Detail:
Created Date:  2003-03-11     Completed Date:  2003-07-29     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8804476     Medline TA:  Environ Pollut     Country:  England    
Other Details:
Languages:  eng     Pagination:  319-24     Citation Subset:  IM    
Affiliation:
Departamento de Biologia Marinha, Universidade Federal Fluminense, Caixa Postal 100644, 24001-970, Niterói, RJ, Brazil. monteiro@vm.uff.br
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MeSH Terms
Descriptor/Qualifier:
Animals
Brazil
Dolphins / metabolism*
Environmental Monitoring / methods
Female
Food Chain
Kidney / metabolism
Linear Models
Liver / metabolism
Male
Metals, Heavy / pharmacokinetics*
Seawater / chemistry
Water Pollutants, Chemical / pharmacokinetics*
Chemical
Reg. No./Substance:
0/Metals, Heavy; 0/Water Pollutants, Chemical

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