TY - JOUR
T1 - Bioaccumulation of heavy metals in fish and Ardeid at Pearl River Estuary, China
AU - Kwok, C. K.
AU - Liang, Y.
AU - Wang, H.
AU - Dong, Y. H.
AU - Leung, S. Y.
AU - Wong, M. H.
N1 - Funding Information:
The authors thank Mr. Man Fung Tse, Mr. Lun Cheong Wong, Mr. Bena Smith, Dr. Ji Xian Wen and Miss Myra Miao for their assistance of field sampling and technical support. Financial support from the Science Faculty Strategic Research Fund of Hong Kong Baptist University (No. FRG/03–04/II-51 ) and Environment and Conservation Fund of Hong Kong Environmental Protection Department (ECF Project no. 16/2003 ) is gratefully acknowledged. The authors do not have any potential competing interests regarding the submitted article.
PY - 2014/8
Y1 - 2014/8
N2 - Sediment, fish (tilapia, Oreochromis mossambicus and snakehead, Channa asiatica), eggs and eggshells of Little Egrets (Egretta garzetta) and Chinese Pond Herons (Ardeola bacchus) were collected from Mai Po Ramsar site of Hong Kong, as well as from wetlands in the Gu Cheng County, Shang Hu County and Dafeng Milu National Nature Reserve of Jiangsu Province, China between 2004 and 2007 (n=3-9). Concentrations of six heavy metals were analyzed, based on inductively coupled plasma optical emission spectrometry (ICP-OES). Significant bioaccumulations of Cd (BAF: 165-1271 percent) were observed in the muscle and viscera of large tilapia and snakehead, suggesting potential health risks to the two bird species, as the fishes are the main preys of waterbirds. Significant (p<0.01) linear relationships were obtained between concentrations of Cd, Cr, Cu, Mn, Pb and Zn in the eggs and eggshells of various Ardeid species, and these regression models were used to extrapolate the heavy metal concentrations in the Ardeid eggs of Mai Po. Extrapolated concentrations are consistent with data in the available literature, and advocate the potential use of these models as a non-invasive sampling method for predicting heavy metal contamination in Ardeid eggs.
AB - Sediment, fish (tilapia, Oreochromis mossambicus and snakehead, Channa asiatica), eggs and eggshells of Little Egrets (Egretta garzetta) and Chinese Pond Herons (Ardeola bacchus) were collected from Mai Po Ramsar site of Hong Kong, as well as from wetlands in the Gu Cheng County, Shang Hu County and Dafeng Milu National Nature Reserve of Jiangsu Province, China between 2004 and 2007 (n=3-9). Concentrations of six heavy metals were analyzed, based on inductively coupled plasma optical emission spectrometry (ICP-OES). Significant bioaccumulations of Cd (BAF: 165-1271 percent) were observed in the muscle and viscera of large tilapia and snakehead, suggesting potential health risks to the two bird species, as the fishes are the main preys of waterbirds. Significant (p<0.01) linear relationships were obtained between concentrations of Cd, Cr, Cu, Mn, Pb and Zn in the eggs and eggshells of various Ardeid species, and these regression models were used to extrapolate the heavy metal concentrations in the Ardeid eggs of Mai Po. Extrapolated concentrations are consistent with data in the available literature, and advocate the potential use of these models as a non-invasive sampling method for predicting heavy metal contamination in Ardeid eggs.
KW - Ardeid
KW - Bioaccumulation
KW - Bioaccumulation factor
KW - Eggshell
KW - Heavy metals
KW - Mai Po
UR - http://www.scopus.com/inward/record.url?scp=84900491853&partnerID=8YFLogxK
U2 - 10.1016/j.ecoenv.2014.04.016
DO - 10.1016/j.ecoenv.2014.04.016
M3 - Journal article
C2 - 24836879
AN - SCOPUS:84900491853
SN - 0147-6513
VL - 106
SP - 62
EP - 67
JO - Ecotoxicology and Environmental Safety
JF - Ecotoxicology and Environmental Safety
ER -
