Maria Desimira Dicu (Stroe)

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THE INFLUENCE OF FEEDING FREQUENCY ON GROWTH PERFORMANCE AND MEAT QUALITY OF A. STELLATUS (PALLAS, 1771) SPECIES, REARED IN A RECIRCULATING AQUACULTURE SYSTEM

Maria Desimira Dicu (Stroe), V. Cristea, Lorena Dediu, Marilena Maereanu, Şt.M. Petrea

Abstract
Achieving noteworthy technological performance in terms of growth, largely depends by using an appropriate nutritional program. Therefore, as a support, the purpose of this paper is to evaluate the effects of two feeding frequencies (2 meals / day - A1 and 4 meals / day -A2), on growth performance and meat biochemistry of stellate sturgeons juvenils. The experiment was initiated using a total of 52 stellate sturgeon juvenils, with a initial average weight of 97 ± 1.8 g. The biological material was divided randomized, into four rearing units, corresponding to each feeding frequency tested, with replicate. At the final of 30 days experiment, the individual average weight was 204 ± 8g/ex. The well-known growth performance parameters (FCR, SGR, PER) recorded values with a slight upward trend for the variant fed with 4 meals / day, the differences being statistically insignificant p ≥ 0.05. Also, the biochemical composition of meat remained generally unchanged in both variants of feeding frequencies; though, the difference was observed only in case of lipids, 0.76% at A1 compared with 0.41% at A2. As a conclusion, the analyze of growth indicators strengthened with the relative robustness (expressed as length-weight factor) of biological material, obtained in experimental conditions, indicates a better efficiency in terms of growth at stellate sturgeon juvenils fed with 4 meals / day, comparing to those fed with 2 meals / day.

Key words: stellate sturgeon, feeding frequency, technological parameters