T. HUBENOVA, A. ZAIKOV, E. KATSAROV and D. TERZIYSKI
Institute of fisheries and aquaculture – Plovdiv, BG-4003 Plovdiv, Bulgaria
HUBENOVA, T., A. ZAIKOV, E. KATSAROV and D. TERZIYSKI, 2015. Weaning of juvenile pikeperch (Sander lucioperca L.) from live food to artificial diet. Bulg. J. Agric. Sci., Supplement 1, 21:17–20
The aim of the experiment was to test two methods of juvenile pikeperch weaning from live food to artificial diet: variant 1: 8 days co-feeding with dry feed and frozen chironomids, followed by dry feed feeding and variant 2: two days feeding with frozen chironomids, followed by dry feed feeding. 1560 individuals of juvenile pikeperch with mean initial total length (TL) 2.540 ± 0.04 cm, weight (W) 0.181 ± 0.01 g and condition factor (K) 1.107 ± 0.03 from a earth pond were randomly distributed into 4 plastic tanks in a flow water system. The study was performed at stocking density of 6 ind.l-1 in double repeat.
The weaning success was evaluated after 20 day rearing period. In the variant 1 there was achieved significantly higher survival rate (mean 52.95%) in comparison with the variant 2 (mean 26.80%). The values of specific growth rate, body weight and body length are better in variant 1 than in variant 2, respectively: 2.184%/0.502%; 0.487 ± 0.02 g/0.377 ± 0.02 g; 3.711 ± 0.07 cm/3.356 ± 0.05 cm.