EFFECT OF PHYTO-ADDITIVES DIETS ON GROWTH PARAMETERS AND BIOCHEMICAL COMPOSITION OF CARP SPECIES (CYPRINUS CARPIO) IN RECIRCULATING SYSTEM

Elena Mocanu, Liliana Athanasopoulos, N. Patriche, Magdalena Tenciu, Elena Jecu

Abstract
   This paper presents the study results carried out on the development of intervention products in the prevention of carp species (Cyprinus carpio) disease. The food formulations have been supplemented with phyto-additives enhanced with antiparasitic and / or bacteriostatic qualities with direct benefits on the biological material.
   The biological material which was the subject of the experiment was a native fish species represented by one-year old carp (Cyprinus carpio), grown in the Brates Research and Development Farm, from Galati. The carp species was subsequently introduced in the recirculating aquaculture system, while being fed with different types of fish food.
   Three types of diets (3 food variants) with different sources of phyto-additives were developed to carry out the experiment.
   The growth parameters and biochemical compositions were determined in the population initially studied (farm carp) before being introduced in the recirculating aquaculture system and when the experiment was finished after 90 days of development, feeded with three experimental diets containing garlic, seabuckthorn and combinations thereof.
   The results of the study clearly indicate that the use of phyto-additive dietary supplements determined improved feed conversion rates in the experimental groups compared to the control groups. This confirms the positive effect of phyto-additive supplements, as previously demonstrated by other fish species experiments such as Yambo et al. (2007) and Lyons (2007) [7, 17], with the biological materials reaching the retail market required size much quicker.
   The existing studies confirm that there is a clear weight gain advantage in different aquaculture species which have been fed with diets containing natural substances which do not pose a risk to fish, human and environmental health (Georgieva K.,2018) [6].
   Batch T3, which was fed with a phyto-additive mix (PER = 2.14 and PPV =43.63), was the most efficient protein harvest batch and batch C, which was fed with the standard food (PER = 1.7 and PPV = 35.16) proved to be the most inefficient.
   Phyto-additive diets which were used in carp nutrition (Cyprinus carpio) influenced favourably the nutritional quality of the specimens involved in the experiment and the previously reported results are consistent with those reported by Gabor E. et al., 2010 [4].

Key words: phyto-additives, growth parameters, biochemical composition, Cyprinus carpio