Diet Compositions of African Pike Hepsetus Odoe (Bloch) In Ikose/Iluju Reservoir, Oyo State, Nigeria | |
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( Volume 1 Issue 1,July 2015 ) OPEN ACCESS | |
Author(s): | |
Adedokun, Mathew Adewale, Fawole, Olatunde O | |
Abstract: | |
The Food habits and diets which Hepsetus odoe fortuitously eaten in Ikose/ Iluju Reservoir Oyo State Nigeria was investigated. A total of 90 fish specimens were examined between April 2013 and March 2014. The ratio of empty stomach among the total number examined was 9/90 (with 90% stomach contents. The species feed mostly on food of animal origin, although detritus/ substrates were also identified and its determination was not practicable. Food consumed was basically fin-fish of different genera and species including Synodontis spp 10(12.4%), Barbus sp 8(9.9%), Hepsetus odoe 3(3.7%), Mormyrids 23(28.4%), Clarids 3(3.7%), Schilbe mystus 2(2.5%), Tilapia spp 15(18.5%) and Unidentified Cichlids 17(21.0%). Generally, the relative importance of the diet components of H. odoe include Cichlids with a total of 32 individuals with the less important being Schilbe mystus with 2 units. The studied species exhibited diets shift in relation to sizes and between seasons. The filial cannibalism tendencies by the fish are more pronounced in male specimens than female. H. odoe only consumed prey ≤ 20 cm SL., and the weight of food items in the stomach on the average was 1.85% of the body weight. There exist instances of prey-predator lengths ratio less than 40% and ratio of prey-predato lengths averaged 17.9%. |
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