The Tablas de Daimiel National Park (TDNP) is a floodplain ecosystem in central Spain with a potential risk of heavy metal and metalloid pollution. The objective of this study was to know the accumulation of arsenic (As), cadmium (Cd), mercury (Hg), lead (Pb), and selenium (Se) in muscle of six species of freshwater fish from the floodplain of TDNP. We obtained muscle samples of Cyprinus carpio (n = 89); Squalius pyrenaicus (n = 16); Ameiurus melas (n = 9); Lepomis gibbosus (n = 8); Micropterus salmoides (n = 6) and Carassius auratus (n = 5). A. melas, which is a predatory species, had significantly higher Hg concentrations than omnivorous or herbivorous species (i.e. C. carpio). On the contrary, A. melas showed lower concentrations of As, Pb and Se than omnivorous species (i.e. S. pyrenaicus and L. gibbosus ). The concentration of Hg was positively associated with fish size in C. carpio and A. melas. Some individuals of C. carpio (5.7%) and S. pyrenaicus (12.5%) showed Pb muscle concentrations above the maximum residue levels established by the European legislation for human consumers. The observed muscle Se concentrations can be associated with adverse effects on fish such as blood changes, reduced growth, mortality of juveniles and reproductive failure. The accumulation of Se in this floodplain located in a seleniferous area and the contamination produced by spent Pb shot pellets used for hunting in the past are discussed as potential sources of the elevated levels of these two elements in fish from this floodplain wetland.

Tablas de Daimiel国家公园（TDNP）是西班牙中部的洪泛区生态系统，具有重金属和准金属污染的潜在风险。这项研究的目的是了解TDNP泛滥平原中六种淡水鱼肌肉中砷（As），镉（Cd），汞（Hg），铅（Pb）和硒（Se）的积累。我们获得了鲤鱼的肌肉样品（n = 89）。鲨鱼角鲨（n = 16）; Ameiurus melas（n = 9）；吉尾油菜（n = 8）; 鲑小鳍p（n = 6）和Car鱼（n = 5）。梅拉斯作为食肉动物，其汞含量明显高于杂食性或草食性物种（即锦鲤）。相反，黑麦曲霉显示的砷，铅和硒的含量低于杂食性物种（即比勒纳酵母和长臂猿）。汞的浓度与鲤鱼和黑曲霉鱼的大小正相关。鲤鱼衣原体（5.7％）和比氏链球菌的某些个体（12.5％）的Pb肌肉浓度高于欧洲法规为人类消费者制定的最大残留水平。观察到的肌肉硒浓度可能与对鱼类的不良影响有关，例如血液变化，生长减慢，幼虫死亡率和生殖衰竭。讨论了硒在硒区中的富集以及过去用于狩猎的用过的Pb铅丸造成的污染，这是该洪泛区湿地鱼类中这两种元素含量升高的潜在来源。