Fe , Cu , Mn ,Ph AND Cd IN SOME FISH SPECIES FROM WESTERN HARBOUR OF ALEXANDRIA, EGYPT

Fe , Cu , Mn ,Ph AND Cd IN SOME FISH SPECIES FROM
WESTERN HARBOUR OF ALEXANDRIA, EGYPT
By
F.T.R. TAYEL* AND M. M. A. SHRIADAH
*National Institute of Oceanography & Fisheries, Kayet Be)’, Alexandria, Egypt.
Key words: HeaV)’ metal pollution, Mediterranean Sea fish species.
ABSTRACT
Concentrations of Fe, eu, Mn, Pb and Cd were determined in muscle
and different organs of 7 different fish species from Western Harbour of
Alexandria namely Diplodus sargus sargus (Linnaeus 1758), Sparus
auratus (linnaeus, 1758), Dicentrachus punctatus (Bloch, 1792), MugU
capito (Cuvier, 1829), Morone labrax (Linnaeus, 1758), Lithognatus
mormyrus (Linnaeus, 1758) and Siganus rivulatus (Forsskal,1775).
The results indicated a high level of accumulation for these elements in
different organs of all fish studied, while their concentration in the
muscle tissue showed the reverse. Toxic metals (Pb and Cd) have higher
values in herbivorous fishes than in carnivorous one. Although most of
the fish samples showed levels higher than National Health and Medical
Council in Australia NHMRC recommendations (2.0 mg/kg in their
organs), none of them contained cadmium concentrations in their muscle
tissues above 0.5 mg/kg. Accumulation factor was found to be high in
Siganus rivulatus for both Pb and Cd. By conlparing the metal intake
from consumption rate of fish with a Provisional Tolerable Weekly
Intake (PTWI) demonstrated that, there is no risk from the human
consumption ofthese fishes.