Comparative study on rearing some valuable species in intensive system using nonconventional fodders
Journal Title: Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society - Year 2012, Vol 5, Issue 5
Abstract
The authors of this work proposed an experiment on rearing two valuable fish species (Cyprinus carpio and Polyodon spathula) in intensive system, using non-conventional fodders (sunflower groats and rice bran) - first variant (I) and mixed/conventional fodders (fine grained) – second variant (II) (using as control). It is expected, that testing the fodders to obtain the best effect in the optimization of the performances in rearing the target fish species. The experiment has taken place in conditions of an intensive system in ground ponds (pond no 8 - HC8 and pond no 9 - HC9), at the Nucet Fish Farm (Experimental Base), with the two experimental feeding variants: I. feeding the material with nonconventional fodders (30% protein) in HC8, and II. feeding the material with mixed fodders (24.86% crude protein) in HC9. Taking into consideration the almost identical environmental conditions and the population density the rearing of the fish depends on additional food given and its quality. Following the performed investigation we can appreciate that, the feeding with non-conventional fodders in intensive and semi-intensive rearing systems, in ponds, can provide the energy and complete range of essential nutrients for the combined culture of common carps and P. spathula. Using good quality stocking biological material (obtained in summer I), a “cheap formula” for feeding, a good quality and volume of water, it is possible to get fish that can be delivered on the market at the required dimensions next year.Taking into account the obtained production using conventional and non-conventional fodders and having in view their price, we can conclude that fodders from the aquaculture market can be successfully replaced with non-conventional ones, which have a more affordable price, resulting in a lower cost per kilogram of fish in the case of mixed culture C. carpio and P. spathula.
Authors and Affiliations
Nicoleta Dobrotă, Gheorghe Dobrotă, Mioara Costache, Nino Marica
Keywords
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