The study investigated the effect of replacing maize with Chrysophylum albidum seed meal on the growth performance and nutrient utilization in Clarias gariepinus. Five isonitrogenous diets containing maize which was replaced by Chrysophylum albidum at a rate of 0, 25, 50, 75 and 100% were formulated. Experimental diets were randomly assigned to the fish in tanks and each group of fish was fed 5% body weight in equal proportion per day. Significant variation (P<0.05) existed in weight gain, specific growth rate; feed conversion, and survival rate among the fish fed various dietary treatments. There was no significant difference (P>0.05) in all the aforementioned parameters between fish fed diet 75% and 100 Chrysophylum albidum. A decrease in growth and nutrient utilization parameters of fish fed various dietary treatments was observed as the level of Chrysophyllum albidum seed meal increased. Replacement of maize by Chrysophyllum albidum in the diets of Clarias gariepinus significantly reduce the growth and nutrient utilization by Clarias gariepinus

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An eight (8) weeks study was carried out on Four hundred and five (405) African catfish (Clarias gariepinus) juveniles to examine the effect of graded levels of egg shell on their growth performance and survival rates. They were acclimatized for two (2) weeks after which they were weighed and allotted into five dietary treatments of three (3) replicates each and 27 fishes per replicate making a total number of eighty-one ( 81) fishes per treatment. The dietary treatments contained 0, 25, 50, 75 and 100(%) egg shell inclusion from treatment one to treatment five respectively. Parameter on daily feed intake, weekly weight gain and daily mortalities were recorded. The result of the experiment indicated that treatment four (4) with 75% inclusion of egg shell was the best in terms of weight gain and survival rates and was significantly different (P < 0.05) when compared with the other treatments. For Catfish farming to remain viable in the nearest future, lower feed cost and increased profit are required; it is therefore recommended that diets of African catfish (Clarias gariepinus) be supplemented with well processed egg shell at 75% level of inclusion to achieve this.