Ultraviolet-B (UVB) radiation generates reactive oxygen species (ROS), which damage DNA, proteins, and lipids in aquatic organisms, including fish. This study evaluated UVB-induced oxidative stress several tissues of two marine teleosts, gilthead seabream (Sparus aurata) European seabass (Dicentrarchus labrax). Juveniles both were exposed to four treatments simulating underwater UVB (no, low, m...

heavy metal accumulation in the aquatic ecosystems is a main concern which threats human health. in this study two commercial fish species, rutilus kutum and chelon aurata were selected for assessing heavy metal (cd, pb, zn) concentrations in gill and liver tissues at babolsar’s coast, the southern caspian sea, iran. babolsar is one of the important fishery stations in the southern caspian sea....

In the present paper, the effect of natural environment non-lethal heavy metal concentration on cell renewal of Liza aurata intestinal epithelium, was studied by the TUNEL (terminal deoxynucleotidyltransferase-mediated dUTP nick end labelling) method and anti-PCNA (proliferating cell nuclear antigen) immunohistochemistry, in order to detect, respectively, apoptosis and cell proliferation. In ad...

To examine the role of glucose-6-phosphatase (G6Pase) in glucose homeostasis in the diabetes-like experimental model of carnivorous fish, we analysed postprandial variations and the effect of starvation, ration size and diet composition on the regulation of G6Pase expression at the enzyme activity and mRNA level in the liver of gilthead sea bream (Sparus aurata). G6Pase expression increased in ...