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Linking cadmium and mercury accumulation to nutritional intake in common dolphins (Delphinus delphis) from Patagonia, Argentina.
Environmental Pollution ( IF 7.6 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.envpol.2020.114480
Gabriel E Machovsky-Capuska 1 , Gabriela von Haeften 2 , M Alejandra Romero 3 , Diego H Rodríguez 4 , Marcela S Gerpe 5
Affiliation  

Bioaccumulation of Hg and Cd from food is a complex ecological process that has been oversimplified in the past. Common dolphins (Delphinus delphis) provide a powerful model to biomonitor metal concentrations in marine environments worldwide. We combined proportions-based nutritional geometry with metal analysis, stomach content analysis and the proximate composition of prey, to yield novel insights into the accumulation of Hg and Cd. Our analysis showed an age-related accumulation trend for Cd and Hg in kidney and liver, with highest concentrations found at 18 years of age. When viewed through the lens of nutritional ecology, Argentine anchovy (58.1 Mass %) and South American long-finned squid (22.7 Mass %), provided most of the dietary intake of protein (P) and lipids (L) (P:L ratio = 2.6:1.0) and also represented the main source for Cd and Hg levels accumulated in their bodies. This study presents unprecedented evidence on metal accumulation in relation to age and nutritional intake in a marine predator.

中文翻译:

将镉和汞的积累与来自阿根廷巴塔哥尼亚的普通海豚(Delphinus delphis)的营养摄入联系起来。

食物中Hg和Cd的生物蓄积是一个复杂的生态过程,过去已过分简化。普通海豚(Delphinus delphis)为全球海洋环境中的生物监测金属浓度提供了强大的模型。我们将基于比例的营养几何学与金属分析,胃液含量分析和附近的猎物组合相结合,以提供有关Hg和Cd积累的新颖见解。我们的分析显示,肾脏和肝脏中Cd和Hg的年龄相关积累趋势,在18岁时发现浓度最高。从营养生态学的角度来看,阿根廷an鱼(58.1质量%)和南美长鳍鱿鱼(22.7质量%)提供了饮食中蛋白质(P)和脂质(L)的大部分摄入量(P:L比例) = 2.6:1。0),也代表体内镉和汞含量的主要来源。这项研究为海洋捕食者中与年龄和营养摄入量有关的金属积累提供了前所未有的证据。
更新日期:2020-04-01
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