The use of citric acid as attractant in diet of grand sturgeon Huso huso fry and its effects on growing factors and survival rate
Journal Title: Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society - Year 2010, Vol 3, Issue 4
Abstract
In an 8-weeks feeding trial, attractant (citric acid) was added to juvenile beluga (Huso huso) diets at different levels in order to increase growth and survival. In this trial that was carried out in Shahid Marjani complex of sturgeon propagation and cultivation, three different dietary of attractants (0.5%, 1% and 1.5%) were taken into account. The trial was carried out in 500 liter PVC tanks which were filled with about 350 liter of water. 50 juvenile beluga (mean initial weight 26.04±0.43g) were stocked in tanks and were fed up four meals a day. Growth and survival factors were analyzed at the end of trial period. After 54 days, weight gain, feed intake, feed conversion ratio (FCR), Daily Growth Index (DGI), Daily Growth Rate (DGR), Specific Growth Rate (SGR), Condition Factor (CF), were higher in beluga fed the three citric acid–added diets compared with control feed. Among the citric acid–added diets, juvenile beluga fed citric acid of 5, 10, 15 g Kg-1 level showed highest weight gain (134 g) by registering 136.6 % increase in growth over control and higher feed intake (7.34) and good FCR (2.20). There was highly significant differences (P<0.05) in weight gain, feed intake, per day growth and FCR among treatment. There was no significant difference (P>0.05) in survival among treatment.
Authors and Affiliations
Mohammad Sudagar, Hosseinpoor Zelti, Abbas Hosseini
Keywords
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