Mercury content in some fresh-water fish from Alexandria

The total-Hg was determined and the distribution among the different organs of 3 fresh-water fish caught from the lake Maruit at Alexandria was studied. Because one of these species (Mugil Cephalus) grows in both fresh and sea-water the effect of growing medium was also investigated. It was found that the total-Hg values differed according to species, size, and organs of fish as well as to fishing ground. It was also noticed that there was an interaction effect between the various factors on the accumulation of total-Hg in fish. Generally, fish obtained from fresh water had lower levels of mercury compared with that collected from sea-water.