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vol-18A COMPARATIVE STUDY OF TRACE ELEMENT ACCUMULATION IN TISSUES
OF 1’HE TELEOS’l’ TILAPIA ZILLII FROM CONTAMINATED AND CLEAN
AREAS
GHAZALY, K.S.
Department of Natural Histrory, Faculty of Education,
University of Alexandria.
ABSTRACT
Concentrations of 9 trace elements were measured in the
whole specimens, liver, kidneys and muscle of Tilepia zillii
inhabiting contaminated and clean areas, Lake Mariut and
El-Nasr channel, respectively. The amounts of the trace
elements: arseni c, cadnhn, copper, lead and manganese in
the whole individuals and tissues of Ttlepia ztlltt could be
used to identify contaminatAd locations,. Their average
concentrations were higher in the whole individuals and
tissues of fish from Lake Mariut than in those of fish from
El·Nasr channel. However, no interregional differences were
noted between chromhn, cobalt, mercury and zinc levels in
the tissues of fish from both areas. Analyses of various
elements in the muscle revealed that higher element
concentrations were found in fish from Lake Mariut than in
those from El-Nasr channel.
I suggest that the high tissue metal levels in Tilapie
zillii from Lake Marfut are mainly due to contamination from
anthropogenic sources.
