Storelli Maria Maddalena, Storelli Arianna, Marcotrigiano Giuseppe Onofrio
Pharmacological-Biological Department, Medicine Veterinary Faculty, University of Bari, Strada Prov. le per Casamassima km 3, 70010 Valenzano, BA, Italy.
Mar Pollut Bull. 2005 Aug;50(8):850-5. doi: 10.1016/j.marpolbul.2005.02.023. Epub 2005 Apr 2.
Concentrations of polychlorinated biphenyls (PCBs) and organochlorine pesticides (DDTs), were determined in the liver of two different shark species Prionace glauca (blue shark) and Dalatias licha (kitefin shark) from the Mediterranean Sea. In blue shark liver, the concentrations of PCBs (2482 ngg(-1)) and DDTs (2392 ngg(-1)) were comparable, while in kitefin shark the hepatic concentrations of DDTs (4554 ngg(-1)) were significantly higher than those of PCBs (1827 ngg(-1)). Contamination levels differed between species, with kitefin shark showing consistently higher concentrations of DDTs, and blue shark higher levels of PCBs. Congener-specific PCB profiles, similar between the two species were dominated by the higher chlorinated congeners (hexachlorobiphenyls: 62.8-63.9%, penta-: 15.2-21.3%, hepta-: 13.4-14.5%) with most of the lower chlorinated congeners being absent or present at very low levels. In both species, the total 2,3,7,8-tetrachlorodibenz-p-dioxin toxic equivalent (TEQs) concentrations (blue shark: 2.51 pg/g; kitefin shark: 1.46 pg/g) seem to be relatively modest. Regards to DDT component pattern, p,p'-DDE was dominant in the liver of both species (blue shark: 81.5%; kitefin shark: 38.0%), while the percentage composition of the other metabolites was differently characterized. The composition pattern of DDTs and the low value of p,p'-DDE/DDTs ratio in the specimens from Ionian Sea suggest that organochlorine pesticide contamination is still continuing in this marine environment.
测定了来自地中海的两种不同鲨鱼物种——灰鲭鲨（Prionace glauca）和黑鲛（Dalatias licha）肝脏中多氯联苯（PCBs）和有机氯农药（DDTs）的浓度。在灰鲭鲨肝脏中，PCBs（2482 ng g⁻¹）和DDTs（2392 ng g⁻¹）的浓度相当，而在黑鲛肝脏中，DDTs（4554 ng g⁻¹）的肝脏浓度显著高于PCBs（1827 ng g⁻¹）。不同物种的污染水平存在差异，黑鲛体内DDTs的浓度始终较高，而灰鲭鲨体内PCBs的水平较高。两种鲨鱼之间相似的同系物特异性PCB谱以高氯代同系物为主（六氯联苯：62.8 - 63.9%，五氯联苯：15.2 - 21.3%，七氯联苯：13.4 - 14.5%），大多数低氯代同系物不存在或含量极低。在这两个物种中，总的2,3,7,8 - 四氯二苯并 - p - 二恶英毒性当量（TEQs）浓度（灰鲭鲨：2.51 pg/g；黑鲛：1.46 pg/g）似乎相对较低。关于DDT成分模式，p,p'-DDE在两种鲨鱼的肝脏中均占主导地位（灰鲭鲨：8C 5%；黑鲛：38.0%），而其他代谢物的百分比组成特征不同。爱奥尼亚海样本中DDTs的组成模式以及p,p'-DDE/DDTs比值较低表明，该海洋环境中有机氯农药污染仍在持续。
