Consejo Nacional de Investigaciones Científicas y Técnicas, Museo Argentino de Ciencias Naturales Bernardino Rivadavia, Avenida Ángel Gallardo 470, C1405DJR Buenos Aires, Argentina.
Centro Bahía Lomas, Universidad Santo Tomas, Avenida Costanera 01834, Punta Arenas, Chile.
Mar Pollut Bull. 2019 Aug;145:325-333. doi: 10.1016/j.marpolbul.2019.05.047. Epub 2019 Jun 3.
Silver (Ag) is a non-essential metal known to bioaccumulate in aquatic organisms. We determined Ag concentrations in five false killer whales stranded in South America. Silver concentrations (in dry weight basis) range as 6.62-10.78 μg g in liver, 0.008-7.41 μg g in spleen, 0.004-5.71 μg g in testis, 0.757-1.69 μg g in kidney, 0.011-0.078 μg g in lung and < 0.01-0.038 μg g in muscle, whereas in the single samples of uterus and ovary were 0.051 and 0.023 μg g; respectively. Overall, Ag concentration in liver and kidney exceeded the cetacean toxic thresholds, proposed as "unhealthy concentrations" and "critically dangerous" in liver and kidney. These results warrant further eco-toxicological studies, to examine biological effects of elevated silver levels for individuals and to assess the species' conservation status with respect to marine pollution.
银（Ag）是一种非必需的金属，已知在水生生物中生物蓄积。我们测定了在南美洲搁浅的五只伪虎鲸体内的银浓度。肝脏中的银浓度（以干重为基础）范围为 6.62-10.78μg/g，脾脏为 0.008-7.41μg/g，睾丸为 0.004-5.71μg/g，肾脏为 0.757-1.69μg/g，肺为 0.011-0.078μg/g，肌肉<0.01-0.038μg/g；而子宫和卵巢的单一样本中的银浓度分别为 0.051 和 0.023μg/g。总体而言，肝脏和肾脏中的银浓度超过了鲸类的毒性阈值，被认为是“不健康的浓度”和“极度危险”的浓度。这些结果需要进一步进行生态毒理学研究，以检查升高的银水平对个体的生物学影响，并评估该物种对海洋污染的保护状况。
