Mapunda Edgar C, Othman Othman C, Akwilapo Leonard D, Bouwman Hindrik, Mwevura Haji
Chemistry Department, College of Natural and Applied Sciences, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania.
Research Unit: Environmental Sciences and Management, North-West University, P Bag X 6001, Potchefstroom 2520, South Africa.
Mar Pollut Bull. 2017 Sep 15;122(1-2):483-487. doi: 10.1016/j.marpolbul.2017.06.055. Epub 2017 Jun 26.
Concentrations of metallic elements in kidney, liver and lung tissues of Indo-Pacific bottlenose dolphins Tursiops aduncus from coastal waters of Zanzibar were determined using inductively coupled plasma - optical emission spectroscopy. Cadmium, chromium, copper, and zinc were quantifiable in all tissues at concentration ranges of 0.10-150, 0.08-3.2, 1.1-88 and 14-210μg/g dry mass, respectively. Copper and zinc was significantly higher in liver, and females had significantly higher Cd in liver, and chromium in lung. Generally, T. aduncus dolphins from coastal waters around Zanzibar carry low concentrations of metals compared with dolphins from other areas. Cadmium increased significantly with age in kidney and lung. Copper decreased significantly with age in liver, probably due to foetal metallothionein. This study supplied baseline data against which future trends in marine mammals in the Indian Ocean, the world's third largest, can be assessed.
利用电感耦合等离子体发射光谱法测定了来自桑给巴尔沿海水域的印太瓶鼻海豚（宽吻海豚）肾脏、肝脏和肺组织中的金属元素浓度。镉、铬、铜和锌在所有组织中均可量化，其浓度范围分别为0.10 - 150μg/g干质量、0.08 - 3.2μg/g干质量、1.1 - 88μg/g干质量和14 - 210μg/g干质量。肝脏中的铜和锌含量显著更高，雌性肝脏中的镉含量显著更高，肺中的铬含量显著更高。总体而言，与其他地区的海豚相比，来自桑给巴尔周围沿海水域的宽吻海豚体内金属浓度较低。肾脏和肺中的镉含量随年龄显著增加。肝脏中的铜含量随年龄显著降低，这可能是由于胎儿金属硫蛋白的缘故。本研究提供了基线数据，据此可以评估世界第三大海洋——印度洋海洋哺乳动物的未来趋势。
