4% B after the fish had reached 40 g average weight, to improve the feeding
efficiency (Coche 1977). Since then, this problem has been tackled by
other researchers.
Table 9. Satisfactory artisanal feeds for the cage culture of tilapias, using local ingredients,
with feed conversion ratios (FCR) and costs where available.
A. Guerrero 197% and Anon. 1979a for S. niloticus and S. mossambicus culture in the
Philippines
- Ingredients (% by weight)
Rice bran 77%
Fish meal 23%- Cost (1979) ~~$0.17/kg~
- FCR 2.5
B. Campbell 1978b and pers. comm. for S. niloticus culture in the Ivory CoastFeed formulation- Ingredients (% by weight)
Misc. carbohydrates b
Rice polishings
Wheat middlings
Peanut oil cake
Cottonseed oil cake
Fish meal
Oyster shell
Total protein content (as % dry weight)- Cost (1978) in us$/kgC
- FCR (approx.)
C. N'Zimasse^1979 for S. niloticus in the Central African Republic- Ingredients (% by weight)
Cottonseed oil cake 82%
Wheat flour 8%
Cattle blood meal 8%
Bicafcium phosphate 2%- Cost (1979) us$0.17/kgd
- FCR 3.2e
a~oist pellets have higher costs than this. This is the cost of ingredients only.
b~.g., brewery waste, maize and rice bran mixed according to availability.
his gives the cost of ingredients only. The pelleting cost to less than 10% moisture
pellets was about US$O.O7/kg.
d~his gives the cost of ingredients only. Dry pellets cost an extra US$O.OG/kg.
e~oor, due partly to oxygen deficiency.