The present study was designed to determine the toxic effects of phostoxin on juveniles of African catfish (Clarias gariepinus). The acute toxicity bioassay was conducted to determine the 96h LC values following the probit 50 analysis method. One hundred and twenty (120) juveniles of Clarias gariepinus(mean weight 25 ± 0.25 g) were exposed to varying concentrations of Phostoxin (0.01, 0.02, 0.03, 0.04 and 0.05 mg/l) including a control (0.0 mg/l) in duplicates in a static bioassay procedure for 96hours. The pH, dissolved oxygen, temperature and conductivity of the test water were monitored and recorded. The results obtained indicated significant (P<0.05) reductions with increased concentrations of phostoxin in haemoglobin (Hb), Red blood Cell (RBC), packed cell volume (PCV), mean corpuscular volume (MCV) and mean corpuscular haemoglobin (MCH). The white blood cell (WBC) and mean corpuscular haemoglobin concentrations (MCHC) in fish exposed to the pesticides were significantly (P<0.05) higher than that of the control. The data obtained from this work will contribute to the baseline haematological effects caused by phostoxin for monitoring the health status of Clarias gariepinus juveniles in the culture medium.
PAPER TITLE :HAEMATOLOGICAL CHANGES IN AFRICAN CATFISH (CLARIAS GARIEPINUS) JUVENILES EXPOSED TO PHOSTOXIN TOXICITY
APPLIED TROPICAL AGRICULTURE | VOLUME 24 NUMBER 2 2019
- Author(s) : Yusuf, H. O. and Olufayo, M. O.