Studies on the Net Cage Cultivation of Two-summer-old Carp (Cyprinus carpio) with Special Emphasis on the Growth Rate and Economic Results
Y. S. STAYKOV, I. GEORGIEV, J. E. MITEV, V. ATANASSOV and D. DJOUVINOV
Thracian University, Faculty of Veterinary Medicine, BG-6000 Stara Zagora, Bulgaria
STAYKOV, Y.S., I. GEORGIEV, J. E. MITEV, V. ATANASSOV and D. DJOUVINOV, 1999. Studies on the net cage cultivation of two-summer-old carp (Cyprinus carpio) with special emphasis on the growth rate and economic results. Bulg. J. Agric. Sci., 5: 453-456
An experiment with two-summer-old carp was conducted for a 122-day period. The fish were allocated in two groups and cultivated in net cages at stocking density of 50 (G1 group) and of 100 pcs/m3 (G2 group), respectively. The objective of the study was to estimate the effect of stocking density on fish growth, feed utilization and economic results of carp net cage cultivation.
Higher fish productivity with a greater survival rate was gained in two-summer-old carp cultivated at a stocking density of 50 pcs/m3 compared to those of 100 pcs/m3. The carp from G1 group had better growth and smaller feed consumption per unit of product than fish from G2 group.
The stocking density did not influence the development of various body parts of carp, and the exterior indices of fish from the two experimental groups were similar.
The carp cultivation at lower stocking density gave better economical results compared to those at higher density. Stocking carp at density of 100 pcs/m3 required 1-year longer period of cultivation than at density of 50 pcs/m3 in order to gain the necessary market weight.
Key words: carp, net cage cultivation, stocking density, fish productivity, economic results
Abbreviations: LW = live weight