Elaboration d'aliments secs pour le tilapia du Nil Oreochromis niloticus (L., 1758) en élevage dans les eaux geothermales du sud Tunisien

Abstract

In order to promote food products of rearing Tilapia in Tunisian fish farms, four dry compound foods were elaborated from conventional raw materials containing various rates of local manufactured fish meal (0 %, 10 %, 20 % and 30%). These foods, containing 36 % of proteins and 6 % of lipids, were tested on Tilapia fingerlings 2 g weight. After 45 days of experiment the final body weight varied between 21.33 g and 29.34 g according to the tested treatments. The best growth rate and food conversion ration were obtained by food containing 20 % and 30 % of fish meal, with respective specific growth rate (SGR) of 5.82 % and 5.89 % and food conversion ration (FCR) of 1.71 and 1.49, against a SGR of 5.2 % and a FCR of 1.96 obtained for the witness food. This successful test which allowed us to have a performed food for the first ongrowing of Tilapia will be pursued for the valorization of local by products in Tilapia feeding.