les aliments utilisés en pisciculture semi intensive en côte d'ivoire et leur productivité

Feeds Used in Semi-intensive-Fish Farming Systems and their productivity in Ivory Coast. A survey was carried out on fish feeds used in semi-intensive fish farming system in Ivory Coast. Fish feeds were collected from 156 fish farms. Their nutritional value and the factors affecting their use as well as their productivity were assessed. Commercial feeds, feeds produced by fish farmers and agro-industrial by-products were used respectively by 51%, 34%, and 47% of the producers, alone or mixed. Nutritional values of commercial feeds meet the nutritional requirement of fish breeding. Conversely, feeds produced by local feed sellers, fish farmers and agro-industrial by-products are in general poor in crude protein and/or rich in crude fiber. The geographical location of the fish farm, the age, the origin, the gender and the main professional activity of the fish farm owner influence the choice of feed. The highest growth parameters were obtained by the commercial feeds compared to fish farmer's feeds or agro-industrial byproducts. The average growth rates of tilapia range between 1.06 and 1.20 g/day. Their yields range between 2445 and 4252 kg/ha/year. The availability of low cost composed fish feeds which take into account the requirement of fish formulated from local and available raw materials would improve fish production.