EFFECT OF HEA VY METAL POUUTION ON GROWTP HORMONE (GH) LEVELS AND GROWTH RATE OF OREOCHROMIS NlLOTICUS

EFFECT OF HEA VY METAL POUUTION ON GROWTP

HORMONE (GH) LEVELS AND GROWTH RATE OF

OREOCHROMIS NlLOTICUS

BY
ABDALLA A. EI-SH… ‘L y..
•National Institute ofOceanography and FISheries.
ABSTRACT
The effect of different concentrations of heavy metal (P -i) on
growth hormone (GH) levels and growth rate of Oreochromis Niloticus
raised in glass aquaria are examined.
The GH levels and growth parameters (final gain in weight. daily gain in
weight. % gain in weight and condition factor) showed decreased values
with increasing heavy metal concentrations in comparison with. the control
(without heavy metal treatment). It was found that the concentrations of
heavy metals in muscles of Oreochromis Niloticus varied directlv with ItS
concentrations in water.