TY - JOUR
T1 - Exploitation of Ethanol Extract of Adenium obesum Stem Bark as a Potent Organic Piscicide
AU - Abalaka, Samson Eneojo AU - Fatihu, Muhamad Yakassai AU - Ibrahim, Najume Doguwar Gingiya AU - Ambali, Suleiman Folorunsho
JO - Research Journal of Biological Sciences
VL - 8
IS - 5
SP - 143
EP - 149
PY - 2013
DA - 2001/08/19
SN - 1815-8846
DO - rjbsci.2013.143.149
UR - https://makhillpublications.co/view-article.php?doi=rjbsci.2013.143.149
KW - Adenium obesum
KW -Clarias gariepinus
KW -toxicity
KW -median lethal concentration
KW -pond management
KW -piscicidal plant
AB - The possible use of ethanol extract of Adenium obesum
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 Clarias gariepinus to the
extract over a 96 h exposure period. Clarias gariepinus of 265.50±4.03
g mean weight and 32.85±0.16 cm mean total length were exposed to 0.00,
6.25, 7.50, 8.20, 8.80 and 9.30 mg L-1 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-1. 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.
ER -