IONIC REGULATION OF THE BLOOD IN THE CAT FI.f)'H CLARIAS LAZERA UNDER THE EFFECT OF EXPERIMENTAL ACID POLLUTION

IONIC REGULATION OF THE BLOOD IN THE CAT FI.f)’H CLARIAS

LAZERA UNDER THE EFFECT OF EXPERIMENTAL ACID

POLLUTION

By
F. I. MOUSSA’, I. SABRY, M. B. ABOU SHABANA

AND M. Y. EL TOWEISSY.

“Dept. of Zoot. Faculty of Science, Alexandria Univ., Alexandria, Egypt.
Key Word: Acid Pollution, Physiology, electrolytes, Cat Fish, Clarias!BHrB.
ABSTRACT
The acute alld chronic treatedfish showed significant decrease in both Na+
alld Ct levels. X levels showed a higher values in the acute case, but all
adaptation appears to take place in the chronic case. An increased in the
concentrations of Cci+ was observed during both acute and chronic acid
exposures.
Na+, K t and ccl+ iOlls eiflux showed a significant increase 24 hrsfollowing
the, transfere offish to pH 3.1. A rapid decrease ofserum osmolality occured
at both pH levels (5.4 and 4. 7), after chronic acid exposure. This decrease was
observed throughout the whole ofthe experimental period. (J2 weeks).