Santa Rosa Island community members derive their income and livelihoods from bio-aquatic resources, principally bivalves of the genus Anadara, both for subsistence use and commercial purposes. Bivalve mollusks have a sedentary lifestyle and feed by filtering water, meaning they absorb all surrounding substances, including harmful elements like toxic metals. This study aimed to analyze different-sized samples of Anadara tuberculosa and Anadara similis, sediment, and Rhizophora mangle leaves to determine their total amount of cadmium, lead, and chromium as a first approach to the evaluation of the health risk related to the consumption of bivalves. For both species from four sampling sites, the results revealed metal concentrations in the bivalves between 0.211 and 0.948 mg kg–1, 0.038, and 0.730 mg kg–1, and 0.067 and 0.923 mg⋅kg–1 for Cd, Cr, and Pb, respectively. The calculated potential risk (>1) for cadmium, considering all body weights, showed a high health risk for consumers. In the case of lead, the results showed a high health risk in children. There was no risk found for chromium. For sediments, the mean values were 2.14, 29.99, and 12.37 mg⋅kg–1 and for the Rhizophora mangle leaves were 2.23, 4.22, and 3.35 mg⋅kg–1 for Cd, Cr, and Pb, respectively. These results did not show a relation with the metal content in bivalves.

中文翻译：

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圣罗莎岛（厄瓜多尔）社区食用的双壳类动物中镉、铬和铅含量的概述及其健康风险评估

圣罗莎岛社区成员的收入和生计来自生物水生资源，主要是 Anadara 属的双壳类动物，用于自给和商业目的。双壳类软体动物以久坐不动的生活方式为食，以过滤水为食，这意味着它们会吸收周围的所有物质，包括有毒金属等有害元素。本研究旨在分析不同大小的 Anadara tuberculosa 和 Anadara similis、沉积物和 Rhizophora mangle 叶子的样品，以确定它们的镉、铅和铬的总量，作为评估与消费有关的健康风险的第一种方法。双壳类动物。对于来自四个采样点的两个物种，结果显示双壳类动物中的金属浓度介于 0.211 和 0.948 mg kg-1、0.038 和 0.730 mg kg-1 之间，Cd、Cr、0.067 和 0.923 mg·kg-1、和铅，分别。考虑到所有体重，计算出的镉的潜在风险 (>1) 显示对消费者的健康风险很高。在铅的情况下，结果显示儿童的健康风险很高。没有发现铬的风险。对于沉积物，Cd、Cr 和 Pb 的平均值分别为 2.14、29.99 和 12.37 mg·kg-1，而 Rhizophora mangle 叶子的平均值分别为 2.23、4.22 和 3.35 mg·kg-1。这些结果没有显示出与双壳类中金属含量的关系。Cd、Cr 和 Pb 分别为 23、4.22 和 3.35 mg·kg–1。这些结果没有显示出与双壳类动物中金属含量的关系。Cd、Cr 和 Pb 分别为 23、4.22 和 3.35 mg·kg–1。这些结果没有显示出与双壳类中金属含量的关系。