Journal
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
Volume 89, Issue 2, Pages 412-418Publisher
SPRINGER
DOI: 10.1007/s00128-012-0663-2
Keywords
Guiana dolphins; Sotalia guianensis; Amazon shelf; Mercury; Brazil
Categories
Funding
- Fundacao Oswaldo Cruz (FIOCRUZ)
Ask authors/readers for more resources
Total mercury (Hg) was analyzed in muscle tissue of 27 accidentally captured Guiana dolphins (Sotalia guianensis) in order to evaluate Hg contamination levels present in the Amazon Continental Shelf, in Amapa state, North Brazil. The samples showed a mean concentration of 0.4 +/- A 0.16 mu g/g wet weight (ww), ranging from 0.07 to 0.79 mu g/g ww. As observed in several other cetacean species, Hg concentrations presented positive correlations to body length, related to the capacity to bioaccumulate this element throughout life. Hg concentrations were not significantly different between males (mean = 0.38 mu g/g ww; n = 15) and females (mean = 0.42 mu g/g ww; n = 12). Concentrations were low when compared to results of studies carried out with small cetaceans in the Northern Hemisphere, and with some previous studies in the south-eastern region of Brazil. In contrast with high Hg concentrations normally detected in river dolphin samples from Amazon River tributaries, our results suggest that the Amazon coast contains low levels of Hg in bioavailable form.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available