AI Article Synopsis
- PCBs and PBDEs were analyzed in two dolphin species (Sotalia guianensis and Steno bredanensis) off the coast of Rio de Janeiro, Brazil.
- PCB levels showed a wide range, with S. guianensis having lower concentrations than S. bredanensis, which may be due to their differing feeding habits.
- The study adds valuable data on organic contamination in southern hemisphere cetaceans, enhancing knowledge of these pollutants' distribution and environmental impact in Southeastern Brazil.
Article Abstract
PCBs and PBDEs were determined in two dolphin species, Sotalia guianensis and Steno bredanensis, from an upwelling system off the Central-northern coast of Rio de Janeiro, Brazil. PCB levels varied from 0.040 to 0.75 μg g(-1) lw in muscles and from 0.022 to 1.32 μg g(-1)lw in liver samples from S. guianensis. In S. bredanensis, values varied from 0.085 to 11.3 μg g(-1) lw in muscles and from 0.024 to 18.6 μg g(-1) lw in livers. PCB-138, -153 and -180 were the major PCB congeners detected in both species, while BDE-47 was the predominant PBDE congener found in both species. Higher concentrations in S. bredanensis were possibly related to the different feeding habits for both delphinid species. These results contribute to extend the database on organic contamination in cetaceans from the southern hemisphere, understanding their distribution and environmental fate in Southeastern Brazil.
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| http://dx.doi.org/10.1016/j.marpolbul.2015.10.039 | DOI Listing |
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