摘要：Summary The aim of this research was to compare chemical composition and content of heavy metals in the meat of sea bass and gilt-head sea bream, both in farmed fish and from free fishing. A total of 30 samples of gilt-head sea bream and 30 samples of sea bass of commercial size, out of which half the samples were farmed fish and the other half were from free fishing. Chemical composition analyses have shown that in both kinds of fish there is a statistically significant difference in content of water, protein, fat and collagen between the samples from free fishing and farmed fish. There was determined four times, i.e. eight times higher content of fat in the meat of farmed samples of sea bass and gilt-head sea bream in comparison to samples of farmed fish. Contents of heavy metals, cadmium (Cd) and lead (Pb) with both fish species and regardless of the origin of fish, were lower than the maximum quantities allowed proscribed by Croatian and EU regulations. As opposed to the quantities of Cd and Pb, the quantity of mercury (Hg) determined in certain samples of both fish species from free fishing was higher than maximum quantity allowed, indicating to the fact that some samples were not safe for consumption. Considering the fact that the content of heavy metals in muscle tissue of fish can vary depending on species, sex, age, season, diet and food availability, in the goal of the total assessment of potential dangers due to consummation of the abovementioned fish species, it is necessary to conduct a more detailed research, taking into account the listed factors.
关键词：chemical composition; heavy metals; sea bass; gilt-head sea bream
