Table 5a.  Calorific value and digestible energy1 (%) of some plant and animal-based feedstuffs for subadult North African catfish Clarias gariepinus
Feed ingredient	Calorific�	DE % � SD2
	value (kJ/g)
A. Animal origin
North African catfish meal	21.3	81.2 � 0.9
White fishmeal 68% protein	20.3	80.0 � 0.8
Brown fishmeal 62% protein	20	82.3 � 0.6
Carcass (meat and bone) meal	14.4	80.4 � 0.9
B. Plant origin
Prime maize gluten	23.6	78.3 � 0.5�
Full fat soya (cooked)	23.3	78.3 � 0.4
Brewer's yeast grain	19.3	65.3 � 0.8
Germ meal (yellow maize)	18.5	63.2 � 0.6
Soya flour (cooked)	18.3	75.8 � 0.6
Sifted white maize meal	17.8	85.4 � 0.8
Sunflower oil seed cake	17.8	63.8 � 0.4
Wheat (cooked)	17.6	80.2 � 0.5
Super maize meal (white)	17.5	79.5 � 0.3
Grain sorghum	17.4	74.3 � 0.9
Cotton oilseed cake	17.1	73.6 � 0.9
Spirulina (single-cell algae)	17	81.3 � 0.7
Wheat bran	17	76.2 � 0.7�
Yellow maize meal	16.2	75.8 � 0.8
Sifted yellow maize meal	16.1	73.8 � 0.6
Dehydrated lucerne meal	15.3	45.8 � 0.8
C. Mycoprotein
Geotrichium�	17.7	78.8 � 0.8
1DE = Gross energy - faecal energy (Jobling, 1983).
Source: Rouhani (1993)