Gilbert Jann M, Reichelt-Brushett Amanda J, Butcher Paul A, McGrath Shane P, Peddemors Victor M, Bowling Alison C, Christidis Les
National Marine Science Centre, Southern Cross University, Coffs Harbour, New South Wales 2450, Australia; Marine Ecology Research Centre, School of Environment, Science and Engineering, Southern Cross University, Lismore, New South Wales 2480, Australia.
Marine Ecology Research Centre, School of Environment, Science and Engineering, Southern Cross University, Lismore, New South Wales 2480, Australia.
Mar Pollut Bull. 2015 Mar 15;92(1-2):186-194. doi: 10.1016/j.marpolbul.2014.12.037. Epub 2015 Feb 2.
Shark fisheries have expanded due to increased demand for shark products. As long-lived apex predators, sharks are susceptible to bioaccumulation of metals and metalloids, and biomagnification of some such as Hg, primarily through diet. This may have negative health implications for human consumers. Concentrations of Hg, As, Cd, Cu, Fe, Se and Zn were analysed in muscle, liver and fin fibres (ceratotrichia) from dusky Carcharhinus obscurus, sandbar Carcharhinus plumbeus, and white Carcharodon carcharias sharks from south-eastern Australian waters. Concentrations of analytes were generally higher in liver than in muscle and lowest in fin fibres. Muscle tissue concentrations of Hg were significantly correlated with total length, and >50% of sampled individuals had concentrations above Food Standards Australia New Zealand's maximum limit (1 mg kg(-1) ww). Arsenic concentrations were also of concern, particularly in fins. Results warrant further investigation to accurately assess health risks for regular consumption of shark products.
由于对鲨鱼产品的需求增加，鲨鱼渔业得到了扩张。作为长寿的顶级掠食者，鲨鱼易受金属和类金属的生物累积影响，并且某些物质（如汞）主要通过饮食进行生物放大。这可能会对人类消费者的健康产生负面影响。分析了来自澳大利亚东南部水域的暗体真鲨、沙虎鲨和大白鲨的肌肉、肝脏和鳍纤维（角质鳍条）中的汞、砷、镉、铜、铁、硒和锌的浓度。分析物的浓度通常在肝脏中高于肌肉，在鳍纤维中最低。肌肉组织中的汞浓度与全长显著相关，超过50%的采样个体的汞浓度高于澳大利亚新西兰食品标准的最大限量（1毫克/千克湿重）。砷的浓度也令人担忧，尤其是在鱼鳍中。研究结果值得进一步调查，以准确评估经常食用鲨鱼产品的健康风险。
