Comparative study on the large-scale intensive culture of pikeperch ( Sander lucioperca) larvae: Evaluation of two different live exogenous food options

This study is focused on the comparison of production efficiency (growth, survival, and development) and economic evaluation of large-scale larvae culture in pikeperch ( Sander lucioperca) ) using Artemia (Group A) compared to using rotifers and the subsequent combination of rotifers and Artemia (Group R) as a first exogenous feed following weaning and intensive culture of juveniles. Both experimental groups were stocked with the same initial density (100 pcs per litre) of larvae at 4 days post hatching (DPH). Each group was cultured in triplicate until 65 DPH. Assessed parameters included FBW (final body weight), FTL (final total length), SGR (specific growth rate), SR (survival rate), CR (cannibalism rate), SBI (swim bladder inflation rate), and TDR (total deformity rate). Production costs were confronted with total number of all produced and high -quality juveniles to determine the cost per one juvenile. Juveniles in Group A displayed more rapid growth (significantly higher FBW, FTL and SGR). On the other hand, parameters concerning quality of the fish (SBI, SR, Share of high quality juveniles and TDR) were significantly higher in Group R. Statistical difference in CR also benefits Group R. Production of bigger share of high -quality juveniles in Group R decreased overall production cost per one high -quality juvenile by 59.7%, from 0.72 EUR in Group A to 0.29 EUR in Group R. Use of established feeding protocols confirmed significant production and economic improvements in pikeperch larvae culture and production of high -quality juveniles. Even though the price of rotifer cultivation significantly exceeded the price of Artemia purchase and cultivation, the production cost of high -quality pikeperch juveniles significantly decreased.