الفهرس 
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Abstract
This study was done in Port Said. Three studied areas were chosen that were characterized by petroleum pollution in addition high fishing activities.
The objective of this study was to investigate the concentrations of polycyclic aromatic hydrocarbons (PAHs) and some heavy metals in both water and Mugil cephalus fish that were collected from El-Nasr Area, Menet El-Syde and El-Gameel Boghaz during the summer season of 2005.
The three studied areas of collected samples were, first area (El-Nasr Area) was located at Suez Canal up to the connection to El-Raswa Canal. Beside this site, the Mobil station was located, in order to provide ships with petrole. At which petroleum spills occurred.
Second area (Menet El-Syde) was located at Suez Canal from the North in the Mediterranean Sea. It was beside the Waiting Station.
Third area was located at El-Gameel Boghaz, connects El-Manzala Lake with the Mediterranean Sea.
The PAHs were separated from water and fish (skin and muscles) then purificated. We used the Gas Chromatography (GC) to measure PAHs concentrations. While heavy metals were measured by using the Atomic absorption spectrophotometer after filtration of water and digestion of fish tissue occurred. The results obtained in this study could be summarized as following:
There were different concentrations of PAHs detected in water and fish from El-Nasr Area, Menet El-Syde and El-Gameel Boghaz.
The LMW-PAHs were not detected in water from the three studied
areas.
The HMW-PAHs showed variable concentrations in water from the three studied areas. Except for D(a,h)A and B(g,h,i)P that were not detected in all sites.
The highest concentrations of the total PAHs were recorded at El-Nasr Area, while the lowest concentrations were at El-Gameel Boghaz.
The ratio of LMW:HMW-PAHs and tluoranthene/pyrene indicated that the origin of PAHs in water may be pyrolytic origin or degraded petrogenic origin.
The results also revealed that there were different concentrations of PAHs detected in fish from the different studied areas. Due to its fat contents in addition the dynamic movement of Mugil cephalus fish.
The LMW-PAHs were not detected in fish from all studied areas except for acenaphthene and anthracene from El-Nasr Area.
The HMW-PAHs showed variable concentrations from one area to another, except for D(a,h)A and B(g,h,i)P that were not detected in the three studied areas. The total PAHs detected in fish were very high in El-Nasr Area and the lowest level was at E1-Gameel Boghaz.
The total PAHs were very high in fish than in water from the three studied areas. Indicated that, PAHs have cumulative effects in fish tissue.
The total carcinogenic PAHs showed higher concentrations in fish than in water, having dangerous effects on the consumer life due to its cumulative effects.
Some heavy metals: lead, cadmium, mercury, copper and zinc were detected in water and fish from El-Nasr Area, Menet El-Syde and El-Gameel Boghaz.
Lead, cadmium and mercury concentrations in water were exceed the WHO, (1984) and Environmental Egyptian Law No.4 / (1994) permissible limits. While copper and zinc not exceed this permissible limits.
Also in fish, the concentrations of lead, cadmium and mercury exceed the Egyptian Organization for Standardization and Quality Control, (1993) permissible limits. While copper and zinc not exceed the permissible limits of Foodstuffs, Cosmetics and Disinfectants, (1972).
The concentrations of heavy metals detected in fish were very high than the concentrations in water, as heavy metals having cumulative effects in fish tissue that may threat the human health.