Investigation of stable pollution by the measurement of heavy metals in muscle of Sillago Sihama in Persian Gulf and Oman Sea

Heavy metals are one of the main pollutants in the aquatic environment (as a result of natural processes and human activities) find away to the quality of aquatic environment [1]. Wastewater treatment in industry, agriculture, transportation, substances produced by burning fossil fuels, land degradation, human waste and animal waste from livestock, comprise of heavy metals in the water body [2]. The concentration measurment of these metals in order to determine the standards of public health and protection of the marine environment is important. This study was conducted to determine Cadmium (Cd) and Zinc (Zn) cocentrations in the muscle of Sillago Sihama in Jask, Minab and Dargahan in the Persian Gulf and Oman Sea. Moreover, the influences of season (Winter and summer) on the Cd and Zn concentrations in Sillago Sihama were investigated. Then, the metals (Cd, Zn) concentrations in muscle were compared with standards. Sampling was done in three stations (Jask, Minab and Dargahan) and two seasons, winter and summer, (n=30 for each season in each station). After biometry of Sillago Sihama, the concentrations of heavy metals (Cd, Zn) were determined using Atomic Absorption Spectrometry (AAS). The results obtained for the concentration of metals (Cd and Zn) in muscle of Sillago Sihama showed that, there were significant differences between stations (Jask, Minab and Dargahan), and also between winter and summer seasons (P 0/05 in both cases). Based on the results, it was found that the concentration of the intended elements in all three regions in summer is more than its concentration in winter. In addition, in regard with the concentration of the mentioned elements in the tissues of Sillago Sihama among the three regions, the highest concentration of cadmium was found in Jask, and the highest concentration of zinc was observed in Minab.The concentration of heavy metals (Cd and Zn) in the muscle of Sillago Sihama is less than the FAO/WHO standard values and stations of Jask, Minab and Dargahan are safe for fisheries activities.