MARE - Marine and Environmental Sciences Centre, ESTM, Polytechnic of Leiria, Portugal.
MARE - Marine and Environmental Sciences Centre, ESTM, Polytechnic of Leiria, Portugal.
Mar Pollut Bull. 2021 Aug;169:112477. doi: 10.1016/j.marpolbul.2021.112477. Epub 2021 May 20.
One of the most landed sharks in Portuguese fisheries is the lesser-spotted dogfish (Scyliorhinus canicula), which is ever-present in Portuguese fish markets and consumed as cheap fish protein source. The focus of this study was to evaluate element contamination in consumed tissues of Atlantic S. canicula, with the intent of safeguarding possible public health issues. A total of 74 specimens were analysed for metals and metalloids in the deeper white muscle and skin. Arsenic, zinc, iron and aluminium were the elements with higher mean values. There was a tendency for higher levels in the skin, with differences between life-stage and gender. Many individuals surpassed stipulated guideline limits for mercury and arsenic, posing a risk for human consumption (according to the health risk assessment performed for the average Portuguese fish consumption) or even for use in feed production. Besides the public health concern, this study also evidences troubling signs on marine contamination status.
在葡萄牙渔业中，最常被捕捞的鲨鱼之一是斑点狗鲨（Scyliorhinus canicula），它经常出现在葡萄牙的鱼市场上，被当作廉价的鱼类蛋白质来源。本研究的重点是评估消费组织中的元素污染大西洋斑点狗鲨，以保障可能存在的公共健康问题。总共分析了 74 个标本的深白色肌肉和皮肤中的金属和类金属。砷、锌、铁和铝是平均值较高的元素。皮肤中的含量有上升趋势，不同生活阶段和性别之间存在差异。许多个体的汞和砷含量超过了规定的指导限值，对人类消费构成了风险（根据对葡萄牙平均鱼类消费进行的健康风险评估），甚至对饲料生产也构成了风险。除了公共健康问题，本研究还表明海洋污染状况令人担忧。
