Samson Eneojo  Abalaka, Muhamad Yakassai  Fatihu, Najume Doguwar Gingiya  Ibrahim, Suleiman Folorunsho  Ambali, 
    Exploitation of Ethanol Extract of <I>Adenium obesum</I> Stem Bark as a Potent Organic Piscicide,
    Research Journal of Biological Sciences,
    Volume 8,Issue 5,
    2013,
    Pages 143-149,
    ISSN 1815-8846,
    rjbsci.2013.143.149,
    (https://makhillpublications.co/view-article.php?doi=rjbsci.2013.143.149)
    Abstract: The possible use of ethanol extract of <I>Adenium obesum</I> 
  stem bark as a potent organic piscicide, against unwanted predatory animals 
  and/or fish in fish ponds prior to the stocking of the desired fish was investigated 
  via the exposure of the hardy air-breathing <I>Clarias gariepinus</I> to the 
  extract over a 96 h exposure period. <I>Clarias gariepinus</I> of 265.50&plusmn;4.03 
  g mean weight and 32.85&plusmn;0.16 cm mean total length were exposed to 0.00, 
  6.25, 7.50, 8.20, 8.80 and 9.30 mg L<SUP>-1</SUP> of the extract in a static 
  acute toxicity bioassay after performing a range finding test. The extract contained 
  some toxicologically bio-active substances. Changes in the fish culture water 
  quality were within acceptable limits. The exposed fish showed signs of restlessness 
  and hyperactivity along with signs of respiratory and nervous compromise, as 
  well as the observed mortality in some of the exposed fish whose appearance 
  and intensity were concentrations and exposure period-dependent. However, no 
  signs of toxicity were observed in the unexposed control fish. The median lethal 
  concentration of the extract in the exposed fish over the 96 h exposure period 
  was 7.15 mg L<SUP>-1</SUP>. Therefore, at this or much higher concentrations, 
  the extract will be a potent organic piscicide that can be used to eradicate 
  unwanted predatory animals, especially fish from ponds prior to the stocking 
  of desired fish.
    Keywords: Adenium obesum;Clarias gariepinus;toxicity;median lethal concentration;pond management;piscicidal plant