Ali M ; Jauncey K ;

Aquaculture Nutrition vol. 10 (1)   pp. 39-45, Fev 2004

Institute of Aquaculture, University of Stirling, Stirling, UK,
zulfikar_bfri@yahoo.com

An 8-week feeding trial was conducted in a recycling water system at 28 plus or minus 1 degree C to investigate compensatory growth and body composition in African catfish Clarias gariepinus (13.05 plus or minus 0.05 g). A fishmeal-based diet containing 350 g kg super(-1) protein and 17.5 kJ g super(-1) gross energy was fed to triplicate groups of 20 fish (per 30-L tank). Fish were fed the diet either to satiation or feed restricted in six feeding schedules as satiation 56 days; restricted 28 days + satiation 28 days; restricted 14 days + satiation 14 days; restricted 7 days +satiation 7 days; restricted 3 days + satiation 4 days; and restricted 2 days + satiation 2 days. The restricted regime was achieved by offering fish 1% (maintenance ration) of their body weight per day adjusted after fortnightly weighing. African catfish showed partial compensatory growth under alternating periods of feed restriction and satiation feeding with significantly different values (P < 0.05) from fish fed in satiation throughout. However, significantly indifferent (P > 0.05) values of feed, protein, lipid and energy utilization were found under alternating periods of feed restriction and satiation feeding. Significantly higher (P < 0.05) feed intake was observed in treatment with satiation throughout than those in other treatments. All the feeding schedules showed no significant differences (P > 0.05) on body composition, organ indices, eviscerated carcass composition, viscera lipid and liver lipid. These studies reveals that C. gariepinus showed partial compensatory growth responses at alternating periods of restricted and satiation feeding

Fish meal ;  Feeding experiments ;  Feeding ;  Aquaculture techniques ;  Body conditions ;  Growth rate ;  Lipids ;  Liver ;  Body organs ;  Biochemical composition ;  Clarias gariepinus ; 

Consulter l'article complet ...