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First report of chlorinated and brominated hydrocarbon pollutants in marine bird eggs from an oceanic Indian Ocean island
North West University, South Africa .
Linköpings universitet, Institutionen för tema, Tema vatten i natur och samhälle. Linköpings universitet, Filosofiska fakulteten.ORCID-id: 0000-0002-5972-1852
Mauritian Wildlife Fdn, Mauritius .
Norwegian School Vet Science, Norway .
Vise andre og tillknytning
2012 (engelsk)Inngår i: Environmental Research, ISSN 0013-9351, E-ISSN 1096-0953, Vol. 118, s. 53-64Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We report for the first time levels of persistent organic pollutants in marine bird eggs from an oceanic island in the Indian Ocean, the worlds third largest ocean. Ten eggs each of the Common Noddy, also known as the Brown Noddy (Anous stolidus), and Sooty Tern (Sterna fuscata) were collected from Ile Cocos off the coast of the island of Rodrigues, located 560 km east of the island of Mauritius. Sigma PCBs had the highest levels (2.2 and 2.6 ng/g wm, wet mass; 20 and 19 ng/g lm, lipid mass) for common Noddy and Sooty Tern, respectively (and following), then Sigma DDT (1.9 and 3.1 ng/g wm; 17 and 23 ng/g lm), and mirex (0.96 and 0.69 ng/g wm; 8.7 and 5.0 ng/g lm). Sigma Chlordanes (0.094 and 0.15 ng/g wm; 0.48 and 0.73 ng/g lm) and Sigma toxaphenes (0.26 and 0.61 ng/g wm; 2.4 and 5.9 ng/g lm) are rare data for these compounds from this ocean. Brominated flame retardants were low (0.08 and 0.07 ng/g wm; 0.7 and 0.7 ng/g lm). Multivariate analyses indicated different contamination patterns in the prey items as Sooty Terns had significantly higher levels of mean Sigma chlordanes and Sigma toxaphenes, as well as CB105, -108 and -157. p,p-DDE had an association with thinner eggshells in the Sooty Tern. Although the contaminant levels were in all respects low, industrialisation, development on the periphery, commercial exploitation of the marine environment, and pollutants transferred over long distances by marine debris is likely to add to chemical pressure in this region. Monitoring changes in background levels of pollutants in remote regions will indicate such trends, and marine bird eggs from Rodrigues would be an excellent site.

sted, utgiver, år, opplag, sider
Elsevier , 2012. Vol. 118, s. 53-64
Emneord [en]
Mauritius, Rodrigues, Common Noddy, Sooty Tern, PBDE, DDT, Eggshell thickness
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-85088DOI: 10.1016/j.envres.2012.05.009ISI: 000309303100008OAI: oai:DiVA.org:liu-85088DiVA, id: diva2:564622
Merknad

Funding Agencies|South African Regional Cooperation Fund for Scientific Research and Technological Development||South African Norwegian Programme for Research Cooperation||

Tilgjengelig fra: 2012-11-02 Laget: 2012-11-02 Sist oppdatert: 2018-01-12

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