Kovács, Béla RóbertFehér, MilánDaud, Ibrahim Abdi2025-06-192025-06-192025-05-07https://hdl.handle.net/2437/393600Fish is a valuable source of polyunsaturated fatty acids, vitamins, proteins, and essential elements. The consumption of fish worldwide increased from 9.9 kg in the 1960s to 19.7 kg in 2013, indicating a growing demand for fish, as demonstrated by the rapid growth of aquaculture. Common carp farming ranks as the world's third most extensive and economically significant species in freshwater. However, fish may be a significant source of human exposure to potentially harmful heavy metals due to increased aquatic pollution from industrial discharge, household waste, agricultural runoff, mine drainage, and unintentional oil spills. This study aimed to compare the differences in heavy metal accumulation between the liver, muscle, and gonad tissues of intensively and extensively cultured common carp and to determine which culture system is more contaminated. The fish tissues were analyzed for heavy metals (Arsenic, Lead, Cadmium, Copper, Zinc, Chromium, Molybdenum, Manganese, Aluminum, Nickel, Cobalt, and Iron) using ICP-MS type XSeriesII. The results indicated that the liver exhibited the highest concentration of all the heavy metals, except for selenium, which had the highest concentration in the gonad tissues, followed by the fillets, while the liver showed the lowest concentration. The accumulation pattern observed was liver > muscle > gonad for Pb, Cr, Cu, and Al. Conversely, Cd, Zn, Ni, Co, Fe, Mn, and Mo demonstrated a liver > gonad > muscle pattern, while for selenium, a gonad > muscle > liver pattern was noted. Arsenic concentration remained below the detection limit in all tissues of the differently cultured fish. Several heavy metal concentrations in the tissues of intensively cultured common carp exceeded the permissible limits set by EC (EC) 2023/915, WHO/FAO, and US EPA more than the extensively cultured fish tissues. This study, therefore, concludes that intensive culture is more contaminated than the extensive system. However, the study also recommends further research to identify the sources of contamination in intensive systems.42enHeavy metalscommon carpCyprinus carpioextensiveintensiveAgricultural SciencesHozzáférhető a 2022 decemberi felsőoktatási törvénymódosítás értelmében.