VARIATION IN TIlE BLOOD CHEMISTRY OF JUVENILE Clarias lazero SUBSEQUENT TO ACUTE AND SUBACUTE COPPER EXPOSURE

VARIATION IN TIlE BLOOD CHEMISTRY OF JUVENILE

Clarias lazero SUBSEQUENT TO ACUTE AND

SUBACUTE COPPER EXPOSURE

A. M. I1ILMY, N. A.EL ·DOMIATY, F. I. MOUSA AND
W. E. ABU – SAMRA.
Department of Zoology. Faculty of Science. Alexandria University. Egypt.
ABSTRACT
This stUdy has delineated the effect of acute
and subacute copper exposure on a fresh water fish.
Clarias lazera. Five different non-cellular
parameters in the blood including serum total
proteins. serum chloride. sodium. potassium and
glucose were investigated. Mean values of serum
total protein for all groups of fish exposed to
different copper concentrations were” higher than
the corresponding control value. A decline in serum
chloride levels were reported in both acute and
subacute tests. The concentrations of both sodium
and potassium observed during the acute and subacute
copper exposure were higher than anticipated.
Serum glucose levels in the acute test were
elevated above the corresponding control levels.
In the subacute test. the magnitude of disturbance
to glucose levels was considerably less than that
caused by acute exposure to copper.