Untitled

Abstract

The concentrations of manganese (Mn), copper (Cu), zinc (Zn), nickel (Ni), cobalt (Co), lead (Pb) and cadmium (Cd) in the muscles of grey mullet (Mugil cephalus) that were collected from Gaza fishing harbor and the surrounding areas were investigated in this study. Eight sampling locations were selected to conduct the study along the coast of Gaza. The samples were taken in September, November 2013 and March 2014. Heavy metals were identified and analyzed by Flame Atomic Absorption Spectrophotometer. The mean concentrations of heavy metals in soft tissues of fish were as follows: Mn:0.90 µg/g; Cu:13.15 µg/g; Zn:25.87 µg/g; Ni:1.10 µg/g; Co:0.68 µg/g; Pb:1.82 µg/g and Cd:0.27 µg/g, respectively. The highest concentrations of metals in fish tissues were found to be detected for zinc (13.56-40.43 µg/g) and the lowest were for cobalt (nd-2.93 µg/g) and cadmium (0.02-0.51 µg/g). The heavy metal concentrations in most fish samples were found to be below the acceptable limits proposed for fish by various international standards such as European Union (EU), World Health Organization (WHO), and Turkish guidelines (TFC). Therefore, it can be concluded that no risk on human health would be elevated at present from the consumption of fish collected from Gaza fishing harbor.

Risk Effect of Water Treatment Sludge on Bioaccumulation of Heavy Metals in Water, Fish (Oreochromis Niloticus, and Clarias Gariepinus) From River Chanchaga Minna Niger State, Nigeria

“…The most prominent chronic manifestations of As involve the skin, lungs, liver and blood systems. The levels of Cd recorded in this study was however much higher than thevalues of 0.27 mg/kg reported for fish by Hossam et al, 2017. Cadmium is a dangerous element because it can be absorbed via the alimentary track; penetrate through placenta during pregnancy and damage membrane and DNA.…”

“…The most important pollutants in aquatic life are HMs because of their toxicity, accumulation and bio-magnification by marine creatures.The high level of heavy metals in the river could indicate similar concentration in fishes by accumulation at concentrations causing serious risk to human health through food chain when consumed. More important is that the very young stages of fish (larvae and juveniles) grow up in the near shore zone, where the water quality is heavily affected by the raw sludge (Zaqoot et al, 2017). Accumulation pattern of HMs varies from fish species, some fish accumulate more heavy metal than others.…”

Organ-specific accumulation of toxic elements in Hilsa shad (Tenualosa ilisha) from Bangladesh and human health risk assessment

“…Fish have been recommended as valuable biological indicators for the assessment of aquatic pollution because they are large in size, considered as resident species, adult, perennial, and easily identified in aquatic medium [8] . In addition, they have a longer life span and a higher position in the aquatic food chain [9] , and thus have been suggested as useful biological markers in the assessment of aquatic environmental pollution [10,11] .…”