ACUTE TOXICITY AND HAEMATOLOGICALRESPONSE OF AFRICAN CATFISH (Clariasgariepinus) JUVENILES EXPOSED OF AQUEOUS (Parkiabiglobosa) LEAF SOLUTION.

Authors

  • Yusuf, A. Department of Fisheries and Aquaculture, Prince Abubakar Audu University, Anyigba, Kogi State, Nigeria.
  • Yunusa, A.
  • Buba, W.
  • Ibitoye, P. T.
  • Salaudeen, M. M.

Keywords:

Toxicity, Haematology, African catfish, Parkiabiglobosa,

Abstract

The acute toxicity of aqueous extract of Parkiabiglobosa leaf on Clariasgariepinus juveniles was investigated in a static bioassay to determine the median lethal concentrations (LC50) at 96 h of exposure. Six graded concentrations of 0, 85.5, 90.5, 95.5, 100.5 and 105.5 mg/l of the aqueous extract were applied to Clariasgariepinus juveniles in plastic containers. The 96 h LC50 values (with 95% confidence limits) estimated by probity analysis was 90.241 mgl-1. Fishes exposed to lethal concentrations (0, 85.5, 90.5, 95.5, 100.5 and 105.5 mg/l) for 96 hours revealed that aqueous extract of Parkiabiglobosa leaf causes alterations in various blood parameters. Red blood cell (RBC) and white blood cell (WBC) counts, haemoglobin concentration and haematocrit values were decreased. The toxicity of the aqueous extract of the plant against Clariasgariepinus was both time and dose dependent. It is expected that this plant extract will be useful in aquaculture to eradicate predators and competing wild fish from nursery, rearing and stocking ponds prior to the stocking of commercially important fry and fingerlings of desired species.

Published

2022-12-30