Investigation of the nutritional environment of the differences in toxicity levels of some heavy metals and pesticides examined in gilthead bream fishes

Abstract

In this study, we investigated the differences between the gilthead bream fishes that live in cages and feed by fish feed (CF), had escaped from the cages and started to live in their natural medium (EF), and live in their natural medium and do not feed by fish feed (NF). We would like to demonstrate the micro pollutants and heavy metal residues in CF, EF and NF and reveal out the diversity in living in three different ambient conditions. We analyzed Mn, Cr, Zn, Sn, Ag, Hg, Cd, Cu, Ni and Pb residues and p-p'-DDE, α-BHC, endosulfan-sulfate, endrin, heptachlor, heptachlor epoxide, methoxychlor, p-p'-DDD, p-p'-DDT, β-BHC, aldrin, cypermethrin, dieldrin ve endosulfan pesticides in three types of gilthead bream (CF, EF and NF) and also researched the heavy metal residues in the marine sample that provided from Guvercinlik Cove in three different time intervals by gas chromatography-mass spectroscopy (GC-MS) and Inductively Coupled Plasma-Mass Spectrometer (ICP-MS). Physical and chemical parameters of sea water samples were studied to reveal out the effect of fish feed between the regions. Heavy metal and organochlorine pesticides residues of gilthead bream muscle tissues from CF are remarkable higher than other regions when we evaluate the all results. The results show an indication of the significant health risks associated with the consumption of these contaminated fish in the cages. The morphology of gilthead bream fish liver tissue samples were studied by using scanning electron microscopy (SEM).

Biochemical composition, heavy metal content and their geographic variations of the form species Nostoc commune across China

“…Arsenic content in Northeast and Northwest of China is relatively high, but the samples with high arsenic content are not only concentrated in Northeast and Northwest provinces of China, but evenly distributed in the whole sample area (Figure S2), so it is possible that N. commune had the ability of arsenic enrichment. Lead is a toxic element that is environmentally common and naturally present in soil but accumulates in the body and has serious toxic effects (Onac et al, 2022). Normally lead is not desired in the food.…”

Multi-residue method of pesticides by UPLC-MS/MS in bivalve mollusks samples as a tool for food quality and safety

“…When these animals develop in polluted waters they can become vehicles of contamination for humans through the food route (Petrarca et al, 2022;Hussein et al, 2022). The health of these foods is essential and, as the cultivation of bivalve mollusks is intended to compose the human diet, these products must be carefully evaluated for the presence of contaminants in order to guarantee their safety and health (Onac et al, 2022). In order to carry out monitoring for the evaluation of contaminants in mollusks, it is essential to implement a validated analytical method for the matrices of interest capable of answering questions about the presence of toxic substances potentially harmful to human health.…”