Heavy Metal Distribution In Egretta Eulophotes In Some Islands Of Fujian

From July to August in 2006, tissues samples of nestlings of yellow- rostra egrets(Egretta eulophotes), eggshells and prey disgorged by nestlings were collected from cai island in Zhangpu of Xiamen, da island and ri island of Fuding. The concentration of 11 kinds of heavy metal and nonmetal, vanadium (V),chromium (Cr),manganese (Mn),copper (Cu),zinc (Zn),arsenic (As),selenium (Se),cadmium (Cd),barium (Ba),plumbum (Pb),mercury (Hg) in different tissues and parts were measured with microwave sample digestion and ICP-MS detection. And distributing disciplinarian of different elements in tissues were analyzed.The result indicated that the residua of 11 elements in different tissues of yellow-rostra egrets were different ,but the trends of total contents of some heavy metals were same , eg. Zn>Cu>Pb>Cd,Cr>Pb>Cd,Ba>Pb>Hg>Cd.Comparison of difference of elements in the tissues of Egretta eulophote indicated that liver, feather and eggshell were the tissues which accumulate most heavy metal, and the residues of heavy metal in them were higher than other tissues. In liver, the most heavy metal were Zn,Cu,Mn,Se, which were essential for function of Ardeidae. For liver was main alexipharmic organ, Cr and Hg in liver were higher than in other organs. Cd,As,V in eggshell and Ba, Pb in feather were highest in all parts. So eggshell and feather could be used as the biomonitor of environmental contamination. It is easy to collect eggshell and feather, so it could avoid killing the birds. In all 11 kinds of heavy metal and nonmetal, comparing with heavy metal concentration in birds of other areas, V, As of Egretta eulophotes in Ximen are higher than other areas. Some heavy metal in liver and eggshell of Egretta eulophotes are higher than that in feather, which is different of other kinds of seabirds.In three islands, cai island, da island, ri island, the levels of heavy metal in tissues of Egretta eulophotes are different. V,As in ri island, Zn,Mn,Se in cai island, V,As,Ba,Pb in da island were highest. In all, cai island and ri island were more suitable for Egretta eulophotes living.The content of Cu,Zn,Cd,Cr in prey disgorged by nestlings were higher than eggshell and all tissues of nestlings. It indicated that heavy metal could be accumulated in birds by food chain.