Trocino Angela, Majolini Duilio, Xiccato Gerolamo
Department of Animal Science, University of Padova, Viale dell'Università 16, I-35020 Legnaro, Padova, Italy.
Chemosphere. 2009 Jun;76(2):250-4. doi: 10.1016/j.chemosphere.2009.03.017. Epub 2009 Apr 5.
The chemical composition and the level of twelve PCB congeners (IUPAC Nos. 18, 28, 31, 44, 52, 101, 118, 138, 149, 153, 180 and 194) were determined in 133 specimens of European sea bass (Dicentrarchus labrax), collected from four Italian aquaculture facilities: extensive valley, semi-intensive ponds, intensive concrete tanks and sea-cages. Fish muscle composition varied based on the rearing system (P<0.001): moisture was higher and fat concentration was lower in fish from the extensive system in comparison to fish from intensive tanks; intermediate values were found in fish from semi-intensive ponds and sea-cages. Concentrations of the 12 measured PCBs (PCB(tot)) and of the seven indicator congeners (PCB(7)) (Nos. 28, 52, 101, 118, 138, 153 and 180), when expressed on fat weight, were lower in extensively-reared sea bass (112.0 and 74.6 ng g(-1) fat, respectively) with respect to sea bass from the other systems (average values: 179.7 and 123.2 ng g(-1) fat) (P<0.001). When the values were expressed on fresh muscle weight, PCB(tot) and PCB(7) were lower in extensively-reared sea bass (3.412 and 2.266 ng g(-1)fw), intermediate in fish from semi-intensive ponds (15.398 and 10.632) and sea cages (13.123 and 8.882), and higher in specimens from the intensive tanks (18.176 and 12.440) (P<0.001). PCB 153 was the most abundant in all of the rearing systems. Within farm, muscular fat content and slaughter weight were positively correlated (r=0.79). PCB(7) concentration expressed in ng g(-1) fat and in ng g(-1) fw was positively correlated with both fish slaughter weight (r=0.71 and 0.73) and muscular fat concentration (r=0.86 and 0.96).
测定了从意大利四个水产养殖设施（粗放型山谷养殖、半集约型池塘养殖、集约型混凝土水箱养殖和网箱养殖）采集的133份欧洲海鲈（Dicentrarchus labrax）样本中12种多氯联苯同系物（国际纯粹与应用化学联合会编号为18、28、31、44、52、101、118、138、149、153、180和194）的化学成分和含量水平。鱼肌肉成分因养殖系统而异（P<0.001）：与集约型水箱养殖的鱼相比，粗放型养殖系统的鱼水分含量更高，脂肪浓度更低；半集约型池塘养殖和网箱养殖的鱼则处于中间值。以脂肪重量计，12种被测多氯联苯（总多氯联苯）和7种指示性同系物（7种多氯联苯）（编号为28、52、101、118、138、153和180）的含量，在粗放型养殖的海鲈中较低（分别为112.0和74.6纳克/克脂肪），相对于其他养殖系统的海鲈（平均值：179.7和123.2纳克/克脂肪）（P<0.001）。以新鲜肌肉重量计，总多氯联苯和7种多氯联苯在粗放型养殖的海鲈中较低（分别为3.412和2.266纳克/克鲜重），半集约型池塘养殖的鱼（分别为15.398和10.632）和网箱养殖的鱼（分别为13.123和8.882）处于中间值，集约型水箱养殖的样本中较高（分别为18.176和12.440）（P<0.001）。多氯联苯153在所有养殖系统中含量最高。在养殖场内，肌肉脂肪含量与屠宰体重呈正相关（r=0.79）。以纳克/克脂肪和纳克/克鲜重表示的7种多氯联苯浓度，与鱼的屠宰体重（r=0.71和0.73）和肌肉脂肪浓度（r=0.86和0.96）均呈正相关。
