Four extruded feeds for carp fry are presented. They contain grains of different cereals (barley, wheat, triticale, rye). A 50-day growth test was carried out on carp fry with a mean individual mass of 9.92 g. The studies were carried out in controlled conditions in an aquarium hall in overflow aquaria of 60 l capacity stocked with 10 fish in each one. Feeds were prepared as isonitric (38% of total protein) and isocaloric diets (3 560 kcal kg^-1 digestible energy) formed into pellets by barothermal method. The experimental feeds were evaluated on the basis of physical and chemical characteristics. On the basis of amino acidic protein in the feeds, the Chemical Score (CS) and Indispensable Amino Acid Index (IAAI) were calculated. For the evaluation of the final results of the growth test, the following indices were used: Specific Growth Rate (SGR), Survival Rate (SR), Food Conversion Rate (FCR), Protein Efficiency Ratio (PER) and Protein Retention (PR). Statistic analyses of the experimental results were carried out using Statistica 5 PL Program. The higest growth increment and growth rate were obtained in carp fry fed on feed containig triticale, while the best food conversion ratio was found in fry fed on feed containing wheat. Feed mixes containing other cereals (barley or rye) gave lower body mass increments and worse food conversion ratios.

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