Natural and anthropogenically-produced brominated compounds in endemic dolphins from Western South Atlantic: another risk to a vulnerable species.
Liver samples from 53 Franciscana dolphins along the Brazilian coast were analyzed for organobrominated compounds. Target substances included the following anthropogenic pollutants: polybrominated diphenyl ethers (PBDEs), polybrominated biphenyls (PBBs), pentabromoethylbenzene (PBEB), hexabromobenzene (HBB), decabromodiphenylethane (DBDPE), as well as the naturally-generated methoxylated-PBDEs (MeO-PBDEs). PBDE concentrations ranged from 6 to 1797 ng/g lw (mean 166 ± 298 ng/g lw) and were similar to those observed in cetaceans from Northern Hemisphere. PBBs were found in all sampling locations (<LOQ to 57 ng/g lw). DBDPE was detected in 42% of the dolphins from the most industrialized Brazilian state and the concentrations ranging from <LOQ to 352 ng/g lw. Franciscana dolphins from the tropical Brazilian shore presented the highest MeO-PBDE concentrations ever reported for coastal cetaceans (up to 14 μg/g lw). Eight MeO-PBDE congeners were detected and the present investigation constituted the first record of occurrence of six of them in marine mammal livers.
Radioisotope Laboratory Eduardo Penna Franca (LREPF), Biophysics Institute Carlos Chagas Filho (IBCCF), Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil.
Mariana B
MB
Alonso
Ethel
E
Eljarrat
Marina
M
Gorga
Eduardo R
ER
Secchi
Manuela
M
Bassoi
Lupércio
L
Barbosa
Carolina P
CP
Bertozzi
Juliana
J
Marigo
Marta
M
Cremer
Camila
C
Domit
Alexandre F
AF
Azevedo
Paulo R
PR
Dorneles
João Paulo M
JP
Torres
José
J
Lailson-Brito
Olaf
O
Malm
Damià
D
Barceló
D000818:Animals; D001267:Atlantic Ocean; D001938:Brazil; D004289:Dolphins / Q000378:metabolism*; D004784:Environmental Monitoring; D005260:Female; D005411:Flame Retardants / Q000032:analysis / Q000378:metabolism; D055768:Halogenated Diphenyl Ethers / Q000032:analysis / Q000378:metabolism; D006842:Hydrocarbons, Brominated / Q000032:analysis / Q000378:metabolism*; D008099:Liver / Q000378:metabolism; D008297:Male; D011075:Polybrominated Biphenyls / Q000032:analysis / Q000378:metabolism; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000378:metabolism*
D005411:Flame Retardants; D055768:Halogenated Diphenyl Ethers; D006842:Hydrocarbons, Brominated; D011075:Polybrominated Biphenyls; D014874:Water Pollutants, Chemical