Bayissa Tokuma Negisho, Gobena Sangi, Vanhauteghem Donna, Du Laing Gijs, Kabeta Mulugeta Wakjira, Janssens Geert Paul Jules
Department of Nutrition, Genetics, and Ethology, Faculty of Veterinary Medicine, Ghent University, Heidestraat 19, 9820 Merelbeke, Belgium.
Department of Biology, College of Natural Sciences, Jimma University, Jimma P.O. Box 378, Ethiopia.
Animals (Basel). 2021 Apr 2;11(4):1000. doi: 10.3390/ani11041000.
This study evaluates the differences in mineral and toxic trace element concentrations of Nile tilapia () tissues from three aquatic ecosystems in Ethiopia-Lake Ziway, Lake Langano, and Gilgel Gibe reservoir-with a focus on edible (fillet) and discarded (digestive tract, gills, skin, and liver) parts. A total of sixty ( = 60) Nile tilapia samples were collected, comprising twenty ( = 20) fish from each lake, and analyzed by inductively coupled plasma mass spectrometry. All elements varied markedly among tissues and between the lakes. Some differences in element concentrations were attributed to differences in nutrient load in the ecosystems and the function of the tissues. For instance, the calcium concentrations in skin and gill were distinctly higher in fish from calcium-rich Lake Langano. The d iscarded parts were richer in essential trace elements, showing an opportunity to promote their use in human nutrition to increase the intake of important minerals. However, the accumulation of elements toxic to humans, such as aluminum, should be monitored and, in particular, controlled when rearing these fish in aquaculture.
本研究评估了来自埃塞俄比亚三个水生生态系统（齐瓦湖、朗阿诺湖和吉尔吉尔·吉贝水库）的尼罗罗非鱼组织中矿物质和有毒微量元素浓度的差异，重点关注可食用部分（鱼片）和废弃部分（消化道、鳃、皮肤和肝脏）。总共采集了60份尼罗罗非鱼样本，每个湖20条鱼，并通过电感耦合等离子体质谱法进行分析。所有元素在组织之间以及湖泊之间都有显著差异。元素浓度的一些差异归因于生态系统中营养负荷的差异和组织的功能。例如，来自富含钙的朗阿诺湖的鱼，其皮肤和鳃中的钙浓度明显更高。废弃部分富含必需微量元素，这表明有机会推广将其用于人类营养，以增加重要矿物质的摄入量。然而，对人体有毒的元素（如铝）的积累应进行监测，特别是在水产养殖中养殖这些鱼类时应加以控制。
