Short chain chlorinated paraffins (SCCPs) are a complex group of chlorinated organic pollutants that have raised an increasing public attention. However, limited information is currently available on the bioaccumulation of SCCPs in terrestrial birds which are abundant and widely distributed around the world. In the present study, chicken (Gallus domesticus) was used as a model organism to provide significant implications for other avian species. We investigated the transfer of SCCPs from dietary sources (feed and topsoil) to chicken and their tissue distribution behavior. SCCPs were detected in chicken feed (54-170 ng/g, dry weight), topsoil (170-860 ng/g, dry weight), and adult chicken tissues (460-13000 ng/g, lipid weight). Adult chicken tended to accumulate SCCP congeners with lower n-octanol-water partition coefficients (KOW) and octanol-air partition coefficients (KOA). The accumulation ratio values for SCCPs of the chicken were more influenced by KOA than by KOW, which was contrary to those for aquatic fish. Levels and homologue profiles of SCCPs varied among chicken tissues. SCCP levels in the livers were significantly lower than those in the other tissues (p < 0.05). The accumulation potential for SCCP congeners with higher KOW increased in the order of muscle < liver < fat.

中文翻译：

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鸡（家禽）中短链氯化石蜡的生物蓄积：与鱼的比较。

短链氯化石蜡（SCCP）是一组复杂的氯化有机污染物，引起了越来越多的公众关注。但是，目前尚缺乏关于短链氯化石蜡在陆生鸟类中的生物蓄积的信息，这些鸟类在世界范围内分布广泛。在本研究中，鸡（Gallus domesticus）被用作模型生物，对其他鸟类具有重要意义。我们调查了短链氯化石蜡从饮食来源（饲料和表土）到鸡的转移及其组织分布行为。在鸡饲料（54-170 ng / g，干重），表土（170-860 ng / g，干重）和成年鸡组织（460-13000 ng / g，脂重）中检测到短链氯化石蜡。成年鸡倾向于积累具有较低正辛醇-水分配系数（KOW）和辛醇-空气分配系数（KOA）的SCCP同系物。鸡的短链氯化石蜡的累积比率值受KOA的影响大于受KOW的影响，这与水生鱼类的相反。在鸡组织中，短链氯化石蜡的水平和同源性概况各不相同。肝脏中的短链氯化石蜡水平显着低于其他组织（p <0.05）。具有较高KOW的SCCP同系物的积累潜力按肌肉<肝脏<脂肪的顺序增加。肝脏中的短链氯化石蜡水平显着低于其他组织（p <0.05）。具有较高KOW的SCCP同系物的积累潜力按肌肉<肝脏<脂肪的顺序增加。肝脏中的短链氯化石蜡水平显着低于其他组织（p <0.05）。具有较高KOW的SCCP同系物的积累潜力按肌肉<肝脏<脂肪的顺序增加。