EFFECT OF POLLUTANTS IN COASTAL WATER OF JEDDAH ON THE 1-HISTOLOGICAL STRUCTURE OF GILLS AND INTESTINE OF THE FISH SIGANUS RIVULATUS (FORSKAL). SAUDI ARABIA

EFFECT OF POLLUTANTS IN COASTAL WATER
OF JEDDAH ON THE
1-HISTOLOGICAL STRUCTURE OF GILLS AND INTESTINE
OF THE FISH SIGANUS RIVULATUS (FORSKAL).
SAUDI ARABIA
NAWAL A. EL-GHAZALY*, EL-SAYDA H.ABDEL-AZIZ* AND
EL-GAWAHER A. BIN DOHAISH**
*Faculty of Science, Alexandria University, Egypt
**Girl’s Collage of Education, Jeddah, Saudi Arabia
Key words: Histopathology, pollution, gills, intestine, siganus rivulatus.
ABSTRACT
The rapid development of industry as well as the anthropogenic activities has created
serious problems of uncontrolled discharge in natural water sources mainly in areas close to
sources of emission. These discharges create unhealthy environment and subsequent
enjurious effects on aquatic life. The present study was carried out to study gills and
intestine histopathology in the fish Siganus rivulatus. This will by waste discharges reveal
any toxic effects of unfavorable water quality in the Red sea coastal water of Jeddah. The
chemical analysis water and sediments from the study area and biochemical analysis of
some body organs (gills and intestine) in Siganus rivulatus revealed contamination with
heavy metals mainly Fe, Pb & Cu in water and sediment and Fe, Zn & Cu in fish organs.
Several histopathological changes were observed in fish organs would serve useful purpose
in evalulting the toxic effects of various pollutants. In gills impairment of gaseous exchange
and osmoregulatory ability of fish were detected. These were swelling and fusion of
adjacent gill lamellae; edematous separation, sloughing and necrosis of the respiratory
epithelium; aneurysm, clubbing, atrophy and lysis of the lamellar blood sinuses and
hyperplasia, spreading and damage of chloride cells. In addition to mucous cells
proliferation; parasitic infection and inflammatory infiltration. Histology of intestine
showed mainly vacuolar degeneration, cloudy swelling, necrosis and massive desquamation
of mucosal epithelium; parasitic infection and cellular infiltration. Histopathological lesions
score in examined tissues were evaluated.