Assessment of Fish Quality Based on the Content of Heavy Metals

Abstract

The aim of this study was to estimate the fish quality in terms of the Cu, Fe, Mn and Zn contents. The research material was the muscle tissue of the fish crucian carp (Carassius carassius Linnaeus, 1758), flounder (Platichthys flesus Linnaeus, 1758), Gilthead seabream (Sparus aurata Linnaeus, 1758), mackerel (Scomber scombrus Linnaeus, 1758), Blue grenadier (Macruronus novaezelandiae Hector, 1871), rainbow trout (Oncorhynchus mykiss Walbaum, 1792), tench (Tinca tinca Linnaeus, 1758), tilapia (Oreochromis niloticus Linnaeus, 1758), Walleye pollock (Gadus chalcogrammus Pallas, 1814) and perch (Perca fluviatilis Linnaeus, 1758.). Heavy metals were determined with the atomic absorption spectrometry method (AAS). Significantly high concentrations of zinc (19.52 mg/kg wet weight), copper (0.77 mg/kg) and iron (6.95 mg/kg) were found in the muscles of crucian carp (p < 0.05) compared to the other fish studied, whereas Walleye pollock had a higher content of manganese (0.266 mg/kg) (p < 0.05). All studied fish species do not pose a threat to humans from these four metals. This was indicated by quality indexes (THQ and HI) whose values were below one. The values of these metals also did not exceed the maximum allowable concentrations established by the FAO (1983), but monitoring both the aquatic environment and the fish living there is necessary, for example, for the time-changing abiotic and biotic factors that can cause an increase in metals in the organs of fish.

Assessment of cooking methods and freezing on the nutritional value and health risks of heavy metals in four fish species consumed in Douala, Cameroon

“…Iron contents of fresh fishes varied significantly (P < 0.05) in Polydactilus quadrifilis and Ethmalosa fimbriata compared to Cyprinus carpio and Arius parkii with value ranging from 22.94 to 76.05 μg/g. These results are higher than those found by Łuczyńska et al [ 62 ] on Carassius carassius (6.95 mg/kg). Environmental factors, species and the fishing period could account for these results.…”

Impact of some trace elements on the quality of edible fish species and its human health risks from Timsah Lake, Egypt

“…Fish are at the highest of the food chain, providing humans with many health benefits: they are low in saturated fat and calories, provide a good supply of protein, and are a good source of omega-3 fatty acids. As a result, fish are frequently employed as bioindicators of pollutants to examine human activities' effects on the environment and health of humans (Kortei et al, 2020;Esmaeilzade Ashini et al, 2021;Łuczyńska et al, 2022). However, modern industrialization has resulted in a significant environmental danger to fish habitats.…”

Assessment of Lead, Cadmium, Chrome, Iron, Zinc and Copper Levels in Tissues of Cyprinus carpio from Atatürk Dam Lake (Adıyaman)

“…Balıklar, yine uzun zincirli çoklu doymamış omega-3 yağ asitleri açısından zengin bir besindir. Bu sucul organizmalar, tatlı su sistemlerinde eser metal kirliliği potansiyelinin tahmini için en belirleyici canlılardan biri olarak kabul edilir (Luczynska et al, 2022). Ayrıca insan tüketimine yönelik potansiyel riski tahmin etmek için de kullanılmaktadırlar.…”