Magan, Karen Cortez, Marcojos, Zorayda Remedios Cloma, ( January 1998 )
Philippine Science High School Western Visayas Campus – Department of Science and Technology (DOST-PSHS WVC), Brgy. Bito-on, Jaro, Iloilo City 5000, Philippines
ABSTRACT
The effects of zinc, Lead, and mercury on the mortality rate of Tilapia nilotica fingerlings were investigated by finding out the LC50 of each chemical. The LC50 of each chemical was obtained through trial and error. The fingerling were also exposed to concentration slightly higher that the LC50.
Results showed that the LC50 of the Lead, Acetate which was compound used for Lead, was 0.012 M. and for Mercury, using HgCI2 it was 0.0005 M.
The effects of the chemical on the fingerlings, from greatest to lowest, was found out to be Hg > Zn> Pb.