Anthropogenic and naturally-produced organobrominated compounds in marine mammals from Brazil.
Liver samples from 51 cetaceans, comprising 10 species, stranded between 1994 and 2006 in a highly industrialized and urbanized region in Southeast Brazil, were analyzed for polybrominated diphenyl ethers (PBDEs) and methoxylated-PBDEs (MeO-PBDEs). A concentration range of PBDEs (3-5960ng/g lw) similar to that observed in Northern Hemisphere dolphins was found. MeO-PBDE concentrations in continental shelf (CS) dolphins from Brazil are among the highest detected to date in cetaceans (up to 250microg/g lw). Higher SigmaMeO-PBDE concentrations were measured in CS and oceanic dolphins than in estuarine dolphins. The SigmaPBDE/SigmaMeO-PBDE ratio varied significantly ranging from a mean value of 7.12 to 0.08 and 0.01 for estuarine, CS and oceanic species, respectively. A positive correlation was observed between SigmaPBDE and year of stranding of male estuarine dolphins (Sotalia guianensis), which suggests temporal variation in the exposure. Placental transfer of organobrominated compounds was also evidenced in S. guianensis.
Dorneles
Paulo R
PR
Biophysics Institute, Rio de Janeiro Federal University (UFRJ), Rio de Janeiro, Brazil; Aquatic Mammal and Bioindicator Laboratory (MAQUA), School of Oceanography, Rio de Janeiro State University (UERJ), Brazil. Electronic address: dorneles@biof.ufrj.br.
Lailson-Brito
José
J
Biophysics Institute, Rio de Janeiro Federal University (UFRJ), Rio de Janeiro, Brazil; Aquatic Mammal and Bioindicator Laboratory (MAQUA), School of Oceanography, Rio de Janeiro State University (UERJ), Brazil. Electronic address: lailson@uerj.br.
Dirtu
Alin C
AC
Toxicological Centre, Department of Pharmaceutical Sciences, University of Antwerp, Belgium; Department of Chemistry, "Al. I. Cuza" University of Iassy, Romania. Electronic address: alin.dirtu@chem.uaic.ro.
Weijs
Liesbeth
L
Toxicological Centre, Department of Pharmaceutical Sciences, University of Antwerp, Belgium; Laboratory for Ecophysiology, Biochemistry and Toxicology, Department of Biology, University of Antwerp, Belgium. Electronic address: liesbeth.weijs@ua.ac.be.
Azevedo
Alexandre F
AF
Aquatic Mammal and Bioindicator Laboratory (MAQUA), School of Oceanography, Rio de Janeiro State University (UERJ), Brazil. Electronic address: azevedo.alex@uerj.br.
Torres
João P M
JPM
Biophysics Institute, Rio de Janeiro Federal University (UFRJ), Rio de Janeiro, Brazil. Electronic address: jptorres@biof.ufrj.br.
Malm
Olaf
O
Biophysics Institute, Rio de Janeiro Federal University (UFRJ), Rio de Janeiro, Brazil. Electronic address: olaf@biof.ufrj.br.
Neels
Hugo
H
Toxicological Centre, Department of Pharmaceutical Sciences, University of Antwerp, Belgium. Electronic address: hugo.neels@ua.ac.be.
Blust
Ronny
R
Laboratory for Ecophysiology, Biochemistry and Toxicology, Department of Biology, University of Antwerp, Belgium. Electronic address: ronny.blust@ua.ac.be.
Das
Krishna
K
Laboratory for Oceanology, MARE Centre, Liege University, Belgium. Electronic address: krishna.das@ulg.ac.be.
Covaci
Adrian
A
Toxicological Centre, Department of Pharmaceutical Sciences, University of Antwerp, Belgium; Laboratory for Ecophysiology, Biochemistry and Toxicology, Department of Biology, University of Antwerp, Belgium. Electronic address: adrian.covaci@ua.ac.be.
D000818:Animals; D001938:Brazil; D004289:Dolphins / Q000378:metabolism*; D004784:Environmental Monitoring; D005260:Female; D005411:Flame Retardants / Q000378:metabolism*; D005618:Fresh Water / Q000737:chemistry; D055768:Halogenated Diphenyl Ethers / Q000378:metabolism*; D006842:Hydrocarbons, Brominated / Q000378:metabolism; D008297:Male; D018811:Maternal Exposure; D012623:Seawater / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000378:metabolism*
D005411:Flame Retardants; D055768:Halogenated Diphenyl Ethers; D006842:Hydrocarbons, Brominated; D014874:Water Pollutants, Chemical