Effect of cage culture environment on farmed fish in terms of metal accumulation

Abstract

s Metal pressure under farm conditions was examined on the gill and muscle tissues of farmed Sparus aurata and compared with their wild counterparts (Sparus aurata, Trachurus trachurus, Mullus barbatus). Al, Mn, Cd, Co, Cr, Cu, Ni, Pb and Zn accumulation amounts in gill tissue of farmed fish were 28.821, 37.620, 0.136, 0.300, 3.730, 2.441, 3.222, 2.474 and 127.494 mg/kg respectively. Among them, Cd, Cr, Cu and Pb concentrations in gill tissue of farmed fish were higher than that in wild fishes. Metal depositions in muscle tissue of farmed fish were far below that in the gill tissue. The accumulated Al (6.700 mg/kg) in the muscle tissue of farmed fish was higher than in wild ones. The results showed that metal accumulation levels (especially Cd, Cr, Cu and Pb) in the gill tissue of farmed fish indicate metal pressure under captive conditions. Furthermore, the calculated hazard index (HI) and total hazard index (THI) of the considered elements in the edible part of farmed fish were below the level considered safe, which elucidates that farmed fish do not pose any threat to the human consumer in terms of metal toxicity.

Sediment Radioactivity Levels of Deep-Water Fishery Grounds in Antalya Bay

“…Several different fish (Deval et al, 2018) and invertebrate species (Deval and Kapiris, 2016;Deval et al, 2017) are caught from these fishing grounds and marketed in the local fisheries markets. Despite several studies having been carried out in the region to assess the state of the pollution in the marine environment (Türkmen et al, 2014;Özhan, 2015;Yilmaz, 2020), to the best of our knowledge, no literature information is available on the radionuclide activity levels of deep-sea sediments. The present study aims i) to evaluate the activity levels of natural ( 226 Ra, 232 Th, 40 K) and anthropogenic ( 137 Cs) radionuclide activities in the deep sea fishing grounds of Antalya Bay and ii) to create a reference database of radionuclide background activity for the region.…”