Growth response and diet utilization in African catfish Clarias gariepinus (Clariidae) fed diets containing cassava (Manihot esculenta) leaf protein concentrate as plant protein source

Oladapo A Fagbenro


Cassava leaf protein concentrate (CLPC) was evaluated as dietary protein source for Clarias gariepinus (6.4±0.4g). A control diet contained SBM, which was stepwise substituted at 20-80% with CLPC in test diets. Catfish fingerlings were fed at 5% body weight/day for 70 days in triplicate diet treatments. No catfish mortality occurred in all treatments. Where CLPC substituted up to 40% of dietary SBM, no adverse effects occurred in growth response and diet utilization. Catfish growth declined and diet was poorly utilized beyond this substitution level, caused by reduction in protein and energy digestibility. Haematological parameters of catfish in all treatments were similar (P >0.05). Histological sections of liver in catfish fed diets containing CLPC substitution up to 40% of dietary SBM showed normal architecture, while those fed higher levels showed slight to severe alterations due to residual anti-nutrients.
Key words: Cassava leaf protein concentrate; Plant protein source; Aquafeed; African catfish.


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