Date of Award
Master of Science (MS)
Sabir Bin Muzaffar
Dr. Humood Abdulla Naser
This study was performed to measure the bioaccumulation of Al, As, Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, P, Pb, V, Zn, Ca, K, Na, Mg, S, Sr, and Hg in the liver, gastrointestinal tract (GI) and muscles of one hundred and five samples of Indian anchovy (Stolephorus indicus) purchased from local fisherman at the three main study areas, namely Ajman, Sharjah, and Umm Al Quwain in UAE. The main objectives of this study were to evaluate the heavy metal concentration in the muscle, liver and gastrointestinal tract (GI) of Indian anchovy, to compare the level of heavy metals with conducted limits by international guidelines, and to investigate the effect of heavy metals on the biomass of Indian anchovy and understand the heavy metal distribution in Socotra cormorant (Phalacrocorax nigrogularis). The ICP-OES system was used for simultaneous determination of Al, As, Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, P, Pb, V, Zn, Ca, K, Na, Mg, S, Sr in the tissues of Indian anchovy. To study Hg concentration, simultaneous axial view Varian SpectrAA 220FS, coupled to an on-line continuous vapor generation system was used. Some metals showed the significance of the model to discriminate between study areas. The level of heavy metals varied significantly among tissues of fish. As expected, liver possessed the highest concentration of all metals. Fe, Zn, Cu, Cr and Cd in liver and GI tract were exceeding the maximum permissible limit recommended by international guidelines. Cd and Cu were also found in the edible part (muscle) of Indian anchovy with the concentration slightly exceeding the maximum permissible limit. Thus, the potential danger may emerge in the future, depending on the quality of wastewaters and industrial activities in the region. Furthermore, heavy metal accumulation in lower trophic levels suggest that species at higher trophic levels could have even higher concentrations of heavy metals due to biomagnification. Therefore, further monitoring programs should be conducted to provide spatial and temporal distribution of heavy metals in the Arabian Gulf.
Qizi Alizada, Nuray Etibar, "The Characterization of Heavy Metals in the Diet of Socotra Cormorants (Phalacrocorax Nigrogularis) In the United Arab Emirates" (2019). Biology Theses. 34.