Biochemical performance of native and introduced clam species living in sympatry: The role of elements accumulation and partitioning.
Mar Environ Res
; 109: 81-94, 2015 Aug.
Article
in En
| MEDLINE
| ID: mdl-26112075
ABSTRACT
The present study reports metal and arsenic contamination in sediments, as well as element accumulation and partitioning in native (Ruditapes decussatus and Venerupis corrugata) and introduced (Ruditapes philippinarum) clam species living in sympatry at the Óbidos lagoon (Portugal). The biochemical performance and the human health risks derived from the consumption of these species are also discussed. The results obtained showed that R. decussatus was the most abundant species in all the sampling sites, revealing that the introduced clam has not yet supplanted the native species. The concentration of elements was higher in areas with higher Total Organic Matter (TOM) and fines content, being Chromium (Cr), Copper (Cu) and Lead (Pb) the most abundant metals. Clams from these areas showed the highest concentration of elements but the lowest bioaccumulation levels. Furthermore, except for As, higher concentration of elements was found in clams insoluble fraction, the less toxic fraction to the organisms. Due to the low contamination levels and because elements, except As, were mainly allocated to the insoluble fraction, clams presented similar biochemical parameters among distinct areas, with no significant oxidative stress induced. Furthermore, clams from the Óbidos lagoon represent a low health risk to human consumption since, except for As, their contamination levels were below the maximum permissible limits defined by international organizations.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Shellfish
/
Water Pollutants, Chemical
/
Bivalvia
/
Geologic Sediments
/
Introduced Species
Type of study:
Etiology_studies
/
Risk_factors_studies
Aspects:
Patient_preference
Limits:
Animals
/
Humans
Country/Region as subject:
Europa
Language:
En
Journal:
Mar Environ Res
Journal subject:
BIOLOGIA
/
SAUDE AMBIENTAL
/
TOXICOLOGIA
Year:
2015
Document type:
Article
Affiliation country:
Portugal