Growth and economic performance of Clarias gariepinus juveniles fed diets containing velvet bean, Mucuna pruriens, seed meal

Abstract

The partial replacement of fishmeal with mucuna seed meal in the diet of cultured juvenile Clarias gariepinus was tested over 70 days to determine their growth, nutrient and economic performance. The 25% fishmeal component of the control diet was replaced with 5-15% raw or processed mucuna seed meal and the fish were fed twice daily at 5% of their average body weight per day. The diet containing 5% raw mucuna seed meal resulted in the best specific growth rate (2.42% d -1 ), feed conversion ratio (2.05) and protein efficiency ratio (1.34), as well as the highest net profit of US$0.065 per fish and the best benefit-cost ratio of 1.32. The diet containing 15% processed seed meal produced the worst results. The processing of mucuna seed resulted in improved crude protein and ether extract and a 20% reduction in crude fibre.

Effects of herbal mixture (Jedi, Gbewutu and Opa-eyin) on the health status of juvenile African catfish (Clarias gariepinus)

“…The fish were acclimatized for 14 days at water temperature of 23-25°C and pH 7.0-7.2 in 12-12 hr light-dark photoperiods. They were fed with commercial diet before the introduction of experimental diet.The water was changed 48-hourly (Finney, 1952;Aderolu and Akpabio, 2009).…”

“…The fish were monitored for mortality on a daily basis and dead fish were removed weighed and recorded. Water in the tank was changed every other day to maintain good water quality as described by Aderolu and Akpabio (2009).…”

Growth response, nutrient utilization, biochemical and hematological parameters of Juvenile African catfish (clarias gariepinus) fed diet supplemented with gongronema latifolia (benth) extract.

“…The fish were transferred to the unit and acclimatized for two (2) weeks being fed with commercial diet before the introduction of experimental diet. They were kept under standard condition; temperature (27.5 -29.5 o c), dissolved oxygen (4.5 -4.8 mg/l), and pH (7.3 -8.0) as described by Aderolu and Akpabio (2009).…”

“…0% inclusion level served as control diet and antibiotics as negative control. Fish feed was formulated to meet the nutrient requirement of the fish (Aderolu and Akpabio 2009). They were kept under refrigerated condition until they are needed for the experiment.…”

The economic effect of insurgency on smoked fish sellers in Maiduguri Metropolis of Borno State Nigeria

“…Fish has been preserved into different forms due to its perishability, such as smoked, canned fish, fish cake, fish meal, fish burger etc. (Afolabi, 2008;Aderolu and Akpabio, 2009). Fish is a major source of food in West Africa and beyond (Akinwumi, 2011;Okorie, 2003).…”