Department of Food Science, University of Teramo, Viale Crispi 212, 64100 Teramo, Italy.
Food Chem. 2013 Dec 1;141(3):2321-7. doi: 10.1016/j.foodchem.2013.05.062. Epub 2013 May 24.
As a rainbow trout producer, Italy is accounted as fifth in the world and second in continental Europe. In this study, the levels of the eighteen PCBs in feed and in trout, showed a statistical significant difference (p<0.01) throughout the years, with a declining trend from 2005 to 2010. This trend shows effectively that quality and safety of trout feeds has greatly improved during the last years and, as a consequence, also the PCBs values in muscle trout, showed a decreasing trend. Moreover, feed Σ18PCBs showed a statistical significant difference (p<0.01) among the analysed brands and was positively correlated (p<0.01 and r=0.451) with the rainbow trout muscle Σ18PCBs. These results showed that the presence of PCBs in trout muscle is directly linked to the chemical quality of aquaculture feed. The most commonly detected PCBs congeners were congeners PCB 153 and PCB 138 in all the three compared brands.
作为虹鳟鱼养殖者，意大利在世界范围内排名第五，在欧洲大陆排名第二。在这项研究中，饲料和虹鳟鱼中 18 种多氯联苯的水平在不同年份之间存在统计学显著差异（p<0.01），从 2005 年到 2010 年呈下降趋势。这一趋势表明，近年来虹鳟鱼饲料的质量和安全性有了显著提高，因此，肌肉中多氯联苯的含量也呈下降趋势。此外，饲料中Σ18PCBs 在分析的品牌之间存在统计学显著差异（p<0.01），并且与虹鳟鱼肌肉中的Σ18PCBs 呈正相关（p<0.01 和 r=0.451）。这些结果表明，虹鳟鱼肌肉中多氯联苯的存在与水产养殖饲料的化学质量直接相关。在所比较的三个品牌中，最常见的多氯联苯同系物是 PCB 153 和 PCB 138。
