Change search
ReferencesLink to record
Permanent link

Direct link
Bioaccumulation of chemical elements in grey seals (Halichoerus grypus) from the Baltic Sea
Norwegian University of Science and Technology, Faculty of Natural Sciences and Technology, Department of Biology.
2011 (Norwegian)MasteroppgaveStudent thesisAlternative title
Bioaccumulation of chemical elements in grey seals (Halichoerus grypus) from the Baltic Sea (English)
Abstract [no]

Concentrations of Ag, As, B, Ba, Bi, Ca, Cd, Ce, Co, Cs, Cu, Dy, Er, Fe, Ga, Ge, Hg, Ho, K, La, Li, Lu, Mg, Mn, Mo, Na, Nd, Ni, P, Pb, Pr, Rb, S, Sb, Se, Si, Sm, Sn, Sr, Tb, Th, Tl, V, W, Y, Yb and Zn in the livers of grey seals obtained from stranded, hunted and by-caught animals from the Swedish and Polish Baltic coasts were determined by ICP-MS. Stable isotope analysis of &#948;13C and &#948;15N was applied to link chemical element concentrations to feeding preferences (pelagic vs. benthic) and trophic position of the seals, respectively. Isotopic ratios in the seals increased in seals from the north towards the southern Baltic Sea, with markedly higher isotopic signatures in seals inhabiting the Polish coast . Analysis of covariance revealed differences in chemical element concentrations between areas for As, B, Cu, Ni, Rb, Sr, Tl with most of these elements exhibiting higher concentrations in seals from the southern Baltic Sea. Additionally age related differences in concentrations of several trace elements were found. Silver, B, Bi, Cd, Co, Hg, Mo, Sb, Se, Sn, V and Zn and the rare earth elements (REE) were found to increase with age. The role of Se in detoxification of Hg was confirmed by high correlation between these two elements (r = 0.99, p < 0.0001). Significantly higher Se:Hg molar ratio were observed in yearlings compared to juvenile and adult seals . Several other elements also revealed statistically significant interrelationships, especially pronounced for the REEs.

Place, publisher, year, edition, pages
Institutt for biologi , 2011. , 73 p.
Keyword [no]
ntnudaim:6775, MSENVITOX Environmental Toxicology and Chemistry, Environmental Toxicology
URN: urn:nbn:no:ntnu:diva-14591Local ID: ntnudaim:6775OAI: diva2:456228
Available from: 2011-11-14 Created: 2011-11-14

Open Access in DiVA

fulltext(2129 kB)398 downloads
File information
File name FULLTEXT01.pdfFile size 2129 kBChecksum SHA-512
Type fulltextMimetype application/pdf
cover(642 kB)46 downloads
File information
File name COVER01.pdfFile size 642 kBChecksum SHA-512
Type coverMimetype application/pdf

By organisation
Department of Biology

Search outside of DiVA

GoogleGoogle Scholar
Total: 398 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 113 hits
ReferencesLink to record
Permanent link

Direct link