Effect of Heavy Metals on Some Physiological Responses in Two Fish Species Inhabiting Mediterranean Sea Coast; Damietta Governorate, Egypt.

Abstract

The present study aims to determine the concentrations of heavy metals: Cadmium, Copper, Iron, Nickel, Lead and Zinc in the two fish species, Sparus aurata and Diplodus sargus, (family: Sparidae) collected from the Mediterranean Sea Coast, Damietta Governorate, in order to: compare concentrations of metals in the different organs (gonads, kidney, liver, muscles, gills, skin and bones) and their effects on the physiological parameters (total proteins, total lipids, ASAT and ALAT) in the edible organs of these species. Results revealed that, the highest values of heavy metals in the different organs of S. aurata and D. sargus were recorded during summer. Although, the two species have the same behavior of feeding, S. aurata showed high values of the different metals than D. sargus. Biochemical analysis indicated devastating effects in metabolic parameters and enzymes activities in S. aurata than D. sargus. ANOVA (p> 0.05) showed significant differences between the different organs and metals. Also, biochemical parameters exhibited a significant increase between seasons and the different organs and a slight difference between the studied fishes.

Effect of bioaccumulation and biosedimentation of some heavy metals on histological features in the cichlid fish, Tilapia zillii inhabiting Lake Qarun, Egypt.

“…The current work showed that, the sediments contain very high levels of some heavy metals compared to water. This difference could be explained by the tendency of metals to accumulate in sediments and biomagnify along aquatic food chains The present data indicates that, the difference in the levels of bioaccumulation in different organs of fish may be due to the physiological role of edible organ with its regulatory ability and feeding behavior of the organism which play a significant role in the difference of bioaccumulation in those organs (Ghanem, 2014(Ghanem, & 2019. Data indicate that, the general increase in mean concentration of heavy metals in the samples may be due to metal bioaccumulation from water during the wet seasons.…”

Effect of Food Availability on Some Biochemical Responses in the Target Organs of Mugil cephalus Inhabiting Abu-Qir Bay, Alexandria, Egypt

“…Proteins serve majorly in the building of cell structure and protection of the body against invaders to keep the immune system intact (Edori and Konne, 2015). The reduction of protein may be due to proteolysis and increased metabolism under toxicant stress (Remia et al, 2008;Ghanem, 2014;kola et al, 2015 andGhanem, 2019). From another angel, Das (1978) suggested that protein content goes on increasing with the advancement in the maturity of Mugil cephalus.…”