SOME EXPERIMENTAL PROBLEMS IN TOXICOLOGICAL STUDIES OF OIL ON MARINE ORGANISMS.

SOME EXPERIMENTAL PROBLEMS IN TOXICOLOGICAL

STUDIES OF OIL ON MARINE ORGANISMS.

HASSAN AWAD* AND A.A. ABOUAWALI**
* Dept. of Oc~anography, Faculty of Science, University
of Alexandr1a, Moharram Sek, Alexandria Egypt
** Faculty of Marine Science, University of King Abdel Aziz
P.O. Box 1540, 21441 Jeddah, Saudi Arabia. ‘
ABSTRACT
In the field of llborltory toxlcologlcll Uudles of 011 on
marine organls.s, the Obtllned results end their Interpretltlon end
intercomperlson Ire dependent on the experimentll conditions,
especllllY the method by which the testlng IlIlldlun Is prepered. The
IlIlldlun Is usually either oil In dispersion or the wlter
Iccommodltlon frIction of 011 (VAF).
In this work, the effects of the experlmentll conditions during
the preperltlon of VAFs of Arlbl.” helYY crude 011 Ire IIlOrtltored
Ind discussed. 80th the rltlo of 011 to wlter end the durltlon of
oll·wlter phlSes separltion Ire considered. Also, vlrlltlons in
the concentrltlon of VAFs off 011 were followed Ilong the habitual
tillle of toxlcologlClI experhentl: frOll 1 to 5 days.
The results showed thlt the working IlIlldII of VAFs of 011 Ire
usually In direct correlltlon with the lbove IIlI”tloned two fectors
to the Inltlll concentrltlon of 011 ·In the -.dIu. corresponds end
never the flnel one during the experiment. However, IIOst probably,
this Is why .” over III CGq)lrltlve _lysis of the IVIlllble datI
on the toxicology of 011 on the ..rlne orglnl_ hIS not yet been
Itt~ted.