03344nas a2200337   4500008004500000020001400045245016000059210006900219260000800288300001200296490000700308520215400315653002902469653003002498653001602528653004002544653002502584653002902609653003302638653003502671653001002706653002002716653002202736100001902758700002502777700001602802700002502818700002002843700001702863856012602880       2007                        Engldsh    a0090-434100aPCB levels and accumulation patterns in waterbird eggs and in their prey at lake Kerkini, a north-eastern Mediterranean wetland of international importance0 aPCB levels and accumulation patterns in waterbird eggs and in th  cAug  a249-2600 v533 aSeven "target" PCB levels were determined and compared in waterbird eggs, in their prey, and in water at Lake Kerkini, northern Greece, to investigate PCB bioaccumulation patterns and to define the best bioindicator of target PCBs for this area. PCBs were analysed from eggs of Phalacrocorax carbo, Podiceps cristatus, Ardea cinerea, Egretta garzetta, and Nycticorax nycticorax and from prey types Alburnus alburnus, Rutilus rutilus, Lepomis gibbosus. Carassius auratus, and Rana sp. PCBs analysed were detected in all bird eggs, prey, and water but contamination patterns differed among these sample types. The lipid-corrected geometric means of the congeners analysed were significantly different among most bird species and among some prey species. PCB congeners 118, 138, 153, and 180 accounted for around 80% of the total PCB contamination in bird egg samples. Percent congener concentrations of high-chlorinated PCBs tended to increase from water through prey to most bird egg samples whereas the low chlorinated PCBs (28 and 52) decreased. Bioaccumulation factors (BAFs) also exhibited an increasing trend for higher chlorinated PCBs from prey types to bird eggs. The greatest BAFs of six of the congeners were shared between Phalacrocorax carbo and Ardea cinerea. Among prey, the BAFs of four PCBs were highest in Lepomis gibbosus. Biomagnification factors varied between 1.01 and 39.57. In contrast to low chlorinated PCBs, high chlorinated congeners biomagnified considerably through fish prey. The highest biomagnification took place in Phalacrocorax carbo. No relationship was found between the lipid content of samples and BAFs of PCBs probably due to biotransformation differences of the congeners in the biota sampled. Due to the greatest PCB concentrations especially of the higher chlorinated PCBs in the eggs of Phalacrocorax carbo and its considerable bioaccumulation tendencies, it is proposed as the best PCB biomonitor of target PCBs at Lake Kerkini. Lepomis gibbosus had the highest concentrations of most congeners and exhibited the greatest bioaccumulative properties among prey and can be used as an alternative biomonitor.10aCHLORINATED HYDROCARBONS10aDOUBLE-CRESTED CORMORANTS10aFRESH-WATER10aOCTANOL/WATER PARTITION-COEFFICIENT10aORGANIC CONTAMINANTS10aORGANOCHLORINE COMPOUNDS10aPHALACROCORAX-CARBO-SINENSIS10aPOLYCHLORINATED-BIPHENYLS PCBS10aroach10aRUTILUS-RUTILUS10aSAN-FRANCISCO BAY1 aAntoniadou, V.1 aKonstantinou, I., K.1 aGoutner, V.1 aSakellarides, T., M.1 aAlbanis, T., A.1 aBintoudi, E.  uhttps://icgf.myspecies.info/content/pcb-levels-and-accumulation-patterns-waterbird-eggs-and-their-prey-lake-kerkini-north