美国鸦片危机 贝类海鲜都中毒 你还敢吃吗?
文章来源: 美国新闻速递 于
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贻贝又名青口、淡菜,是很多民众喜爱的贝类海鲜。路透社图
华盛顿州鱼类和野生动物部门本周在对当地的贝类海鲜做测验后得出震惊的结果。位于华盛顿西北海岸太平洋入口的贝类海鲜中发现了鸦片成分。除此之外,科学家们还在它们中发现了化学清洁剂、抗抑郁药、化疗药物等成分。
作为华盛顿州普吉特湾(Puget
Sound)贝类监测计划的一部分,华盛顿州鱼类和野生动物部门的生物学家们一直在西雅图附近海域测试当地的贝类海鲜。他们将从无毒、水产养殖厂采集的贻贝(mussels)放入普吉特湾周边18处住宅区的海域,数月后捞起重新测试,看它们是否被任何物质污染。
华盛顿州鱼类和野生动物部门科学家Jennifer
Lanksbury指出,近来的测试结果发现,这些贻贝中含有类鸦片药物,此外还含有清洁产品中的化学物质,7种抗生素,5种抗抑郁药,多种抗糖尿病药和治疗卵巢癌和乳腺癌的化疗药物成分等。其中的表面活性剂产生雌激素,可影响某些动物的激素系统,例如让雌化雄性鱼类,让雌鱼早产等。
Lanksbury强调,科学家们尚未研究类鸦片类药物对贻贝的伤害,但是这个结果证明了普吉特湾周边城市使用此类毒品的人数众多。很多成分随尿液进入厕所,后被收集至污水处理厂,最终流入大海。
由于贻贝拥有比鱼类更简单的系统,鱼类可以代谢一些化学物质,但是贻贝不会。所以很多科学家使用贻贝来研究水中的污染情况。专家指出,绝不要食用在城市海湾中采捞贻贝。餐厅和鱼市场中供应的贻贝还安全,但是这种情况威胁鱼类生态系统,尤其是鲑鱼等物种。
研究结果表明,有毒污染物正在进入普吉特湾的食物链,尤其是靠近海岸线的西雅图与周边城市,而美国的鸦片危机已经开始影响海洋生物了。
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