THE EFFECT ON BIOCHEMICAL COMPOSITION OF DIFFERENT CONCENTRATIONS PROBIOTIC FED TO JUVENILE CARP (CYPRINUS CARPIO, L. 1758) IN A RECIRCULATING AQUACULTURE SYSTEM

Elena Bocioc, V. Cristea, N. Patriche, Iulia Grecu, Săndiţa (Placintă) Ion, Mirela (Creţu) Mocanu, M.T. Coadă

Abstract
    Knowledge about biochemical composition of flash fish allow estimation about: general maintenance conditions, methods of availability to natural and supplementary trophy basis, nutritive value of flash and establishing the impact of environmental conditions to metabolic processes. In this study, some biochemical determinations of carp (Cyprinus carpio, L. 1758) tissues were investigated. The biochemical analysis of the meat has been effectuated in the experiment that took place during 60 days, in four breeding units of 500 liters in volume each. Four kind of variants were compared: V1-pellets with 30% crude protein, without probiotics; V2-pellets with 30% crude protein, with probiotics of 2.24 x 109 CFU/kg food; V3-pellets with 30% crude protein, with probiotics of 3.84 x 109 CFU/kg food; and V4-pellets with 30% crude protein, with probiotics of 7.04 x 109 CFU/kg food. We used BioPlus® 2B probiotics (a mixture of Bacillus licheniformis (DSM 5749) and Bacillus subtilis (DSM 5750). After analyses the biochemical composition in stage one was: V1-16.89% proteins, 1.57% lipids; V2-16.47% proteins, 2.5% lipids; V3-16.72% proteins, 1.87% lipids; V4-15.52% proteins, 1.69% lipids and in the second stage was: V1-14.47% proteins, 1.63% lipids; V2-15.70% proteins, 3.12% lipids; V3-14.45% proteins, 1.85% lipids; V4-15.24% proteins, 2.35% lipids. The obtained results showed that are insignificant differences (p>0.05) in the levels of proteins, fats and ash between the control variant (V1) and experimental variants (V2, V3, V4) where probiotic supplements were used.

Key words: musculature, rainbow trout, muscular fibres, epaxial, hypaxial