TY - JOUR
T1 - Temporal variation and biomagnification of organohalogen compounds in finless porpoises (Neophocaena phocaenoides) from the South China Sea
AU - Ramu, Karri
AU - Kajiwara, Natsuko
AU - Lam, Paul K.S.
AU - Jefferson, Thomas A.
AU - Zhou, Kaiya
AU - Tanabe, Shinsuke
N1 - Funding Information:
The authors are thankful to Dr. A. Subramanian (CMES, Ehime University) for critical reading of the manuscript. This study was supported by Grants-in-Aid for Scientific Research (A) (16201014) from Japan Society for the Promotion of Science and Young Scientists (B) (Project 16780139) and “21st century COE program” from the Ministry of Education, Culture, Sports, Science and Technology, Japan, and “Materials Cycles Modeling of Persistent Toxic Chemicals and its policy Research Applications for Recycling and Waste Management” from the Waste Management Research Grants of the Ministry of the Environment, Japan. One of the authors (P.K.S.L.) was supported by a grant from the Hong Kong Research Grants Council (CityU1103/03M). Thanks are also due to the many colleagues and assistants who have helped in the stranding program in Hong Kong over the years, especially Dr. Samuel K. Hung, Ms. Mientje Torey, and Ms. Isabel Beasley. The stranding program in Hong Kong is funded by the Agriculture, Fisheries and Conservation Department of the HKSAR Government.
PY - 2006/11
Y1 - 2006/11
N2 - Polybrominated diphenyl ethers (PBDEs) and organochlorine compounds (OCs) were determined in the blubber of male finless porpoises (Neophocaena phocaenoides) collected in 1990 and 2000/01 from the South China Sea. Among the organohalogen compounds analyzed, DDTs and PCBs were the predominant contaminants in the porpoises, ranging from 26,000 to 260,000 and 1400 to 28,000 ng/g lipid wt., respectively. PBDEs ranged from a minimum of 84 ng/g lipid wt., in 1990 to a maximum of 980 ng/g lipid wt., in 2001, showing a significant increase during the time period investigated. Congener profiles in finless porpoises did not shift to higher BDE congeners during these years, implying a continuous discharge of lower BDE commercial mixtures, such as PentaBDE. For OCs, HCHs concentrations decreased significantly, while others did not exhibit any significant temporal variation. Biomagnification factors (BMFs) were found to be highest for CHLs and lowest for HCB. PBDEs and PCBs had comparable BMFs, indicating a similar potential for biomagnification through the food web.
AB - Polybrominated diphenyl ethers (PBDEs) and organochlorine compounds (OCs) were determined in the blubber of male finless porpoises (Neophocaena phocaenoides) collected in 1990 and 2000/01 from the South China Sea. Among the organohalogen compounds analyzed, DDTs and PCBs were the predominant contaminants in the porpoises, ranging from 26,000 to 260,000 and 1400 to 28,000 ng/g lipid wt., respectively. PBDEs ranged from a minimum of 84 ng/g lipid wt., in 1990 to a maximum of 980 ng/g lipid wt., in 2001, showing a significant increase during the time period investigated. Congener profiles in finless porpoises did not shift to higher BDE congeners during these years, implying a continuous discharge of lower BDE commercial mixtures, such as PentaBDE. For OCs, HCHs concentrations decreased significantly, while others did not exhibit any significant temporal variation. Biomagnification factors (BMFs) were found to be highest for CHLs and lowest for HCB. PBDEs and PCBs had comparable BMFs, indicating a similar potential for biomagnification through the food web.
KW - Finless porpoise
KW - Organochlorines
KW - Polybrominated diphenyl ethers
KW - South China Sea
KW - Temporal variation
UR - http://www.scopus.com/inward/record.url?scp=33748620289&partnerID=8YFLogxK
U2 - 10.1016/j.envpol.2006.01.027
DO - 10.1016/j.envpol.2006.01.027
M3 - Article
C2 - 16540219
AN - SCOPUS:33748620289
SN - 0269-7491
VL - 144
SP - 516
EP - 523
JO - Environmental Pollution
JF - Environmental Pollution
IS - 2
ER -