Growth-Dependent and Species-Specific Accumulation of Polychlorinated Biphenyls (PCBs) in Tidal Flat Organisms Collected from the Ariake Sea, Japan
Growth-Dependent and Species-Specific Accumulation of Polychlorinated Biphenyls (PCBs) in Tidal Flat Organisms Collected from the Ariake Sea, Japan
复制标题
日本有明海滩涂生物中多氯联苯 (PCB) 的生长依赖性和物种特异性积累
DOI：
10.1007/s00244-001-0002-9
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发表时间：
2002
影响因子：
4
通讯作者：
T. Miyawaki
中科院分区：
文献类型：
--
作者：
H. Nakata;Y. Sakai;T. Miyawaki
研究了从日本西部有明海收集的滩涂生物体中多氯联苯 (PCB) 的生长相关以及物种特异性积累情况。杂食性鱼类中多氯联苯的浓度较高，其次是螃蟹、草食性鱼类和贻贝。这表明营养水平在这些生物体中 PCB 积累中发挥着重要作用。在草食性弹涂鱼中观察到了与年龄和体长相关的多氯联苯积累，尽管在鱼类的相似生长阶段发现了大范围的浓度变化。研究发现，浓度与体长而非年龄之间存在高度相关性，这可能表明受饮食摄食率强烈影响的生长速度似乎是决定 PCB 积累的主要因素。此外，根据食草鱼类卵和全身的PCB含量，PCB的转移率估计约为雌性身体负担的10%。鸡蛋和全身之间 PCB 成分的比较表明，低氯同系物选择性转移到鸡蛋中，这可能是由于它们在鸡蛋和全身脂质之间达到稳定状态的瞬时周期。生物体中的 BSAF（生物群-沉积物积累因子）与 log Kow 之间的关系表明，杂食性弹涂鱼体内显着积累了 PCB，这可能是由于它们在滩涂环境中的摄食率较高和/或营养状态较高。
The growth-related as well as species-specific accumulation of polychlorinated biphenyls (PCBs) was studied for tidal flat organisms collected from the Ariake Sea, western Japan. Elevated concentrations of PCBs were found in omnivore fishes, followed in decreasing order by crabs, herbivore fishes, and mussels. This revealed that trophic levels play an important role in PCB accumulation in these organisms. Age- and body length–dependent accumulations of PCBs were observed in herbivorous mudskippers, although a large range of concentrations was found in similar growth stage of fishes. High correlations have been found between concentrations and body length rather than age, which may indicate that the growth rate, which is strongly influenced by the feeding rate of diets, seems to be the predominant factor in determining PCB accumulation. Besides, based on PCB levels in eggs and the whole body in herbivore fishes, the transfer rate of PCBs was estimated to be approximately 10% of female body burdens. Comparison of PCB compositions between eggs and whole body suggests the selective transfer of lower-chlorinated congeners to eggs, which may be due to their instantaneous periods to achieve steady state between egg and whole body lipids. The relationship between BSAFs (biota-sediment accumulation factors) in organisms and log Kow revealed that omnivore mudskipper significantly accumulated PCBs in their body, which might be due to their greater feeding rate and/or higher trophic status in the tidal flat environment.