ECONOMIC FEASABILITY OF CULTURE OF CONSUMPTION FISH UNDER DIFFERENT FEEDING CONDITIONS

Abstract

In experimental ponds of individual sizes 0.1 ha-1 the fish farm Draganići, the economic feasibility of the culture of consumption carp fish in poli culture with herbivorous fish was investigated (Hypophthalmichthys, molitrix, Val. Aristichthys nobilis Rich. Ctenopharyngodon idella Val.). The stock density was 3250 ind.ha-1of total one year old fish: carp 77%, herbivorous 23%. Investiga- tions were investigations were carried out during the culturing season, from 25 April to 4 October 1990. Thre treatments were investigated: I - feeding the carp with grains, without fertilizig the pond, II - feeding the fish with grains and fertilizing the pond with mineral fertilizer NPK of the formula 17:8:9 with the total quantity of 400 kg.ha-1, and III - feeding the carp with industrial brickets with 20% animal protein. The results show that treatments II and III had appositive affect on the growth and amount of all species of fish in poli culture. The most favorable economic result was reached with treatment II where the carp were fed with grains. The fish treated in this variation reached the highest economic production, accumulation and gain. The highest total gain was reached in the III variation along with supplement protein feeding. The result of investigations showed a satisfactory application of animal proteins in food of consumption carp, along with the proper choice of polyculture and stock density.

Keywords

• carp
• herbivores
• polyculture
• economical