PATHOLOGICAL CHANGES IN DIFFERENT SPECIES AND EMBRYOLOGICAL STAGES OF FISH INDUCED BY UREA - FERTILIZER WASTEWATER.

PATHOLOGICAL CHANGES IN DIFFERENT SPECIES AND
EMBRYOLOGICAL STAGES OF FISH INDUCED BY
UREA – FERTILIZER WASTEWATER.
MAGDA I. ZAKI* AND SAMrA G. SAAD**

*Instiute of OCeanography and Fisheries. Alexandria. Egypt.

*~fgh Institute of Public Health. Alexandria University. Alexandria. Egypt.

ABSTRACT
The raw waste of HAC or LAC is highly toxic.
Raw effluent wIth HAC has l C values in the 50
range of 1.7 – 1.5 S vol. I vol. while for lAC
ranging from 7.6 – 9.2 S vol. I vol.
AImIonla at very low concentration down to 0.04
mg/l In presence of traces of Cr. Pb. Cu. and Zn
caused hypertrophy of gIll fflalllent and hyperplasia
of the epIthelIal surface of respiratory lalllellae
for fingerlIngs of ~rus aurata with respect to
fry MUgtl captto gill filament and lammeller
organIzatIon were dIstorted by severe edema and
separatIon of respiratory epitheliUM.
liver was also affected at the same tested
concentration of 4 S vol. I vol. of waste as indicated
by abnonnal accumulatIon of lipid in ~rus aurat.l
rangIng from moderate to severe. “‘tn captto small
intestine show a forthy vacuolated mucosal epithelium
and loss brush border. Treatlllent of this effluent
eliminated this effect.