The effects of different feeding frequencies (one, two, three and four meals per day) on growth performance and feed conversion efficiency of Russian sturgeon juveniles (Acipenser gueldenstaedtii) was studied over a period of 45 days. The experiment took place in a recirculating aquaculture system provided with eight rearing units. 160 Russian sturgeon juveniles with an initial weight of 349.81±34.56 g, were randomly distributed, in order to create four experimental variants in duplicate. At the end of the experiment all fish were weight and measured and the growth parameters were calculated. The results indicated that fish fed twice and once per day had the highest growth performance compared to fish feed with three and four meals/day. It was concluded that choosing a feeding frequency of two meals per day is much more sustainable in terms of economic costs.

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In the present article, we aim to present aspects regarding the contest and suspension of the administrative tax provisions, the notification of the prosecuting authorities and the consequences regarding the ongoing procedures. For the purpose of challenging the administrative tax provisions, the Law No. 207/2015 regarding the Fiscal Procedure Code, with subsequent amendments and supplements, it is supplemented by the Law on administrative litigation No. 554/2004, with subsequent amendments and supplements, and by the Law No. 134/2010 regarding the Code of Civil Procedure, republished, with subsequent amendments and supplements.

The aim of this paper was to analyze some morphometric characteristics and the correlation between them for Russian sturgeon juveniles (Acipenser gueldenstaedtii) reared in a recirculating aquaculture system fed at different fed with different ratio: 1% body weight (BW), 1.5% BW, 2% BW and ad libitum feeding (which was around 2.8% BW).Fish, with an average body mass around 248.194 ± 1.59 g. Following biometric measurements were made for each fish, including weight (W), total length (TL), standard length (SL), fork length (FL), maximum body depth (last depth of caudal peduncle, H); preanal distance (AD), predorsal distance (PD), length of head (C), preorbital distance (PO), length of pectoral fin (LPF), interorbital distance (ID), maximum width of head (MH), width of mouth (WM), width of the head at the level of the mouth (WHM). The obtained results showed significant differences between all morphometric measurements (p<0.05) for all the experimental variants, emphasizing that in the ad libitum feeding all morphometric measurements were significantly higher than in the other experimental variants. In order to highlight more eloquent these differences, were developed some linear regressions between the morphometric measurements and significant positive correlation (p<0.05) between dependent and independent variables were found.