Burreau Sven, Zebühr Yngve, Broman Dag, Ishaq Rasha
Department of Zoology, Stockholm University, Stockholm SE-106 91, Sweden.
Chemosphere. 2004 May;55(7):1043-52. doi: 10.1016/j.chemosphere.2003.12.018.
Pike, perch and roach from rural waters of the Baltic Sea were investigated for possible biomagnification of polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs). For this we used data on delta15N, weight and sex of the fish. We were able to separate body size effects from trophic position effects on biomagnification. Both these parameters lead to biomagnification of PCBs and PBDEs. All investigated PCBs (tri- to deca-CBs) biomagnify and the biomagnification potential is positively correlated with hydrophobicity up to log Kow 8.18. Tri- to hepta-BDEs also biomagnify but showed a maximum biomagnification for the penta-BDEs (log Kow 6.46-6.97). The biomagnification of hexa- to hepta-PBDEs was negatively correlated with degree of bromination, likely due to large molecular size or high molecular weight (644-959 Da). Octa-, nona- and deca-BDEs did not biomagnify but were found in two (octa-BDE) and three (nona- and deca-BDEs) of the species, respectively. Increased size of pike is correlated with increased lipid weight based PCB and PBDE concentrations in males but not in females and mean PCB and PBDE concentrations in males are generally higher than in females. For the least hydrophobic PCBs, no sex difference is observed, probably as a consequence of faster clearance of these substances over the gills, making the spawning clearance of PCBs and PBDEs of lesser relative importance.
对来自波罗的海农村水域的梭子鱼、鲈鱼和拟鲤进行了调查，以研究多氯联苯（PCBs）和多溴二苯醚（PBDEs）可能的生物放大作用。为此，我们使用了鱼类的δ15N、体重和性别的数据。我们能够将体型效应与生物放大作用中的营养级效应区分开来。这两个参数都会导致PCBs和PBDEs的生物放大。所有研究的PCBs（三至十氯联苯）都会发生生物放大，且生物放大潜力与疏水性呈正相关，直至log Kow为8.18。三至七溴二苯醚也会发生生物放大，但五溴二苯醚（log Kow为6.46 - 6.97）的生物放大作用最大。六至七溴二苯醚的生物放大与溴化程度呈负相关，可能是由于分子尺寸大或分子量高（644 - 959 Da）。八溴、九溴和十溴二苯醚不会发生生物放大，但分别在两种（八溴二苯醚）和三种（九溴和十溴二苯醚）物种中被发现。梭子鱼体型的增大与雄性基于脂质重量的PCB和PBDE浓度增加相关，但与雌性无关，且雄性的平均PCB和PBDE浓度通常高于雌性。对于疏水性最低的PCBs，未观察到性别差异，这可能是由于这些物质通过鳃的清除速度更快，使得PCBs和PBDEs在产卵时的清除相对不那么重要。
