Acute Toxicity Of Nile Tilapia (Oreochromis niloticus) Juveniles Exposed To Aqueous And Ethanolic Extracts Of Ipomoea aquatica Leaf
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Date
2011
Authors
Ayoola, S. O.
Kuton, M.P
Idowu, A.A
Adelekun, A.B
Journal Title
Journal ISSN
Volume Title
Publisher
Nature and Science
Abstract
The differential acute toxicity of aqueous and ethanolic extracts of Ipomoea aquatica leaf on Nile
Tilapia, Oreochromis niloticus were carried out under laboratory conditions. The LC50 after 96hr of exposure for
aqueous and ethanolic extracts of Ipomoea aquatica were 2.659g/L and 0.196g/L respectively. These values showed
that ethanolic extract of Ipomoea aquatica was more toxic than its aqueous extract. Signs of agitated behaviours,
respiratory distress and abnormal nervous behaviors including eventual deaths were observed in exposed fish.
Control fish neither died nor exhibited any unusual behaviour. The randomized analysis of variance (ANOVA)
showed that there were significant differences (P<0.05) in the quantal response (mortality) of O. niloticus to aqueous
and ethanolic extracts of I. aquatica at 24hrs, 48hrs, 72hrs and 96hrs of exposure period. It was investigated that leaf
of Ipomoea aquatica has piscicidal property and can be put into use in the control and management of fish ponds to
eradicate predators by farmers.
Description
Keywords
Acute toxicity, Ipomoea aquatica, Oreochromis niloticus
Citation
Simeon O. Ayoola, Kuton M.P, Idowu A.A and Adelekun, A.B (2011): Acute Toxicity of Nile Tilapia (Oreochromis niloticus) Juveniles Exposed to Aqueous and Ethanolic Extracts of Ipomoea aquatica Leaf. Nature and Science 9(3):91-99