Acquired Results on Rearing of Sevruga Larvae (Acipenser stellatus – Pallas, 1771) in Superintensive System

DANIEL OPREA, LUCIAN OPREA

Abstract


The experiments were made in a flow-through superintensive system, sturgeon larvae being reared in spun glass troughs. Experiment duration was 20 days. The biological material, sevruga larvae (Acipenser stellatus –Pallas 1771) at the age of 16 days post hatch was acquired by artificial propagation of breeders captured from natural environment. The experiment was carried out in two variants with three replications each. In each variant, the rearing densities were as follow: in variant I –1000 ex/tank, and in variant II –1400 ex/tank. In both experimental variants, the feeding of larvae was made in the same way, respectively: the same number of daily ratios, deal instantaneous for both variants, and it was used the same type of feeds, represented by live diet (Daphnia species and Tubifex species) and a type of fodder, namely Perla Larva with a protean content of 62.00 %. At the end of experiment, the gained results were as follow: in variant I, the survival rate was 80 %, and the final average body mass of larvae 1.6 g/ex, in variant II, the survival rate was 72 %, and the final body mass of larvae 1.35 g/ex.

Keywords


sturgeon; Acipenser stellatus; density; troughs

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DOI: http://dx.doi.org/10.15835/buasvmcn-asb:66:1-2:3377


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