Meloni Domenico, Mudadu Alessandro Graziano, Abete Maria Cesarina, Bazzoni Anna Maria, Griglione Alessandra, Pederiva Sabina, Stella Caterina, Serra Simonetto, Fois Nicola, Esposito Giuseppe, Squadrone Stefania
Department of Veterinary Medicine, University of Sassari.
Complex Structure of Microbiology and Inspection of Food of Animal Origin, Experimental Zooprophylactic Institute of Sardinia, Sassari.
Ital J Food Saf. 2022 Feb 24;11(1):9970. doi: 10.4081/ijfs.2022.9970. eCollection 2022 Feb 22.
The present study aimed to determine trace elements in Mediterranean mussels () from an experimental pilot farm of the Calich Lagoon, a typical Sardinian brackish area (Italy). Two sampling sessions were scheduled in February and May 2019 and the occurrence of 24 metals (Hg, Ag, Al, As, Be, Bi, Cd, Co, Cr, Cu, Fe, Ga, In, Mg, Mn, Mo, Ni, Pb, Rb, Se, Sn, Ti, V, Zn) in bivalves was considered. Environmental conditions of water (temperature, salinity, pH, dissolved oxygen, and chlorophyll ) were also measured . A high significant (P<0.001) difference was reported for temperature, pH, and dissolved oxygen. Our results showed a significant sessional variation of Mo (P<0.001); Cd, V (P<0.01); Ni, Pb and Co (P<0.05) in examined samples; as all values were higher in February than those for May session samples, meanwhile the highest levels were reported for Mg (mean±s.d. 1151±263 mg kg wet weight), Al (mean±s.d. 341±192 mg kg w.w.), and Fe (mean±s.d. 212 ±75 mg kg w.w.) in February samples. The European Union uppermost values (EC Reg. 1881/2006) for Cd, Hg, and Pb were never overpassed. The results confirmed the role of as one of the most appropriate biological indexes to track the presence of trace elements in brackish environments. It could be concluded that the current ecology of the Calich Lagoon suggests that compatibly with the transitional ecosystem, the classification as a bivalves' production area and the implementation of extensive shellfish farming can improve its production capacities. The knowledge of the lagoon ecology is an essential tool for its sustainable exploitation, preserving biodiversity, and mitigating the effects of anthropogenic activities on public health.
本研究旨在测定来自意大利撒丁岛典型咸淡水区域卡利奇泻湖一个实验性试点养殖场的地中海贻贝中的微量元素。2019年2月和5月安排了两次采样，研究了双壳贝类中24种金属（汞、银、铝、砷、铍、铋、镉、钴、铬、铜、铁、镓、铟、镁、锰、钼、镍、铅、铷、硒、锡、钛、钒、锌）的存在情况。还测量了水的环境条件（温度、盐度、pH值、溶解氧和叶绿素）。据报告，温度、pH值和溶解氧存在极显著差异（P<0.001）。我们的结果显示，在所检测的样本中，钼（P<0.001）、镉、钒（P<0.01）、镍、铅和钴（P<0.05）存在显著的季节性变化；因为2月份的所有数值均高于5月份样本的数值，同时2月份样本中镁（平均值±标准差 1151±263毫克/千克湿重）、铝（平均值±标准差 341±192毫克/千克湿重）和铁（平均值±标准差 212±75毫克/千克湿重）的含量最高。镉、汞和铅的欧盟最高限量值（欧盟法规1881/2006）从未被超过。结果证实了贻贝作为追踪咸淡水环境中微量元素存在情况的最合适生物指标之一的作用。可以得出结论，卡利奇泻湖目前的生态状况表明，与过渡性生态系统相适应，将其分类为双壳贝类产区并实施粗放式贝类养殖可以提高其生产能力。对泻湖生态的了解是实现其可持续开发、保护生物多样性以及减轻人为活动对公众健康影响的重要工具。
