PCBs and the energy cost of migration in the European eel (Anguilla anguilla L.).
PCBs and the energy cost of migration in the European eel (Anguilla anguilla L.).
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多氯联苯和欧洲鳗鱼（Anguilla anguilla L.）迁移的能源成本。
DOI：
10.1016/j.aquatox.2009.01.004
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发表时间：
2009
影响因子：
4.5
通讯作者：
A. Murk
中科院分区：
文献类型：
--
作者：
V. V. van Ginneken;A. Palstra;P. Leonards;M. Nieveen;H. V. D. van den Berg;G. Flik;T. Spanings;P. Niemantsverdriet;G. van den Thillart;A. Murk
研究了多氯联苯（PCBs）对禁食银欧鳗（Anguilla anguilla L.）在27天的时间里，动物们要么休息，要么在Blazka游泳隧道里游泳800公里。三岁的雌性孵化场鳗鱼（银阶段）之间的73和80厘米长，重约1公斤的腹腔内剂量与多氯联苯在10倍的标称剂量的消费标准，作为混合物的代表平面（7微克多氯联苯126/千克鳗鱼），非平面（5 mg PCB 153/kg鳗鱼）和可代谢PCBs（50μg PCB 77/kg鳗鱼），或仅与载体（玉米油，10 ml/kg鳗鱼）混合。进行了四项主要观察：（1）与未接触多氯联苯的对照动物相比，接触多氯联苯的动物体重减轻较少;（2）在游泳时，多氯联苯在脂质基础上的浓度是静止动物的2.8-14倍;（3）接触多氯联苯的动物的标准代谢率明显低于未接触多氯联苯的对照动物。此外，多氯联苯暴露显着减少游泳过程中的耗氧量，并开始在400公里（18天），这种效果随着时间的推移而增加;（4）相对脾脏和肝脏的重量显着增加，在多氯联苯游泳动物，但没有在多氯联苯休息动物。游泳的动物比休息的动物多减掉了75%的体重，血浆脂肪含量降低了50%。红细胞压积，血红蛋白，血浆pH值，离子水平（钠和钾），和血浆乳酸没有受到多氯联苯暴露或游泳。显然，目前的多氯联苯和其他二恶英类化合物水平可能严重损害欧洲鳗鱼的繁殖。
The effect of polychlorinated biphenyls (PCBs) on the energy consumption of fasting silver European eel (Anguilla anguilla L.) was studied over a 27-day period during which the animals were at rest or were swimming 800km in Blazka swim tunnels. Three-year-old female hatchery eels (silver stage) between 73 and 80cm long weighing around 1kg were dosed intraperitoneally with PCBs at a nominal dosage of 10× the consumption standard as a mixture representative for planar (7μg PCB126/kg eel), non-planar (5mg PCB153/kg eel) and metabolizable PCBs (50μg PCB77/kg eel) found in wild eel, or only with the vehicle (corn oil, 10ml/kg eel). Four major observations were made: (1) PCB-exposed animals lose less weight compared to their unexposed controls; (2) PCB-concentrations on a lipid basis are 2.8–14 times higher in swimming compared to resting animals; (3) the standard metabolic rate is significantly lower in the PCB-exposed animals than in unexposed controls. In addition, PCB-exposure significantly reduces oxygen consumption during swimming, and starting at 400km (18 days) this effect increases with time; (4) the relative spleen and liver weight significantly increased in the PCB-swim animals but not in the PCB-rest animals. The swimming animals lost about 75% more weight compared to resting animals and had about 50% lower plasma fat content. Hematocrit, haemoglobin, plasma pH, ion levels (sodium and potassium), and plasma lactate were not affected by PCB-exposure or swimming. Apparently, the current levels of PCBs and other dioxin-like compounds may seriously impair the reproduction of the European eel.