The effect of different daily feed rations on the growth, condition, survival and feed conversion of juvenile pikeperch (Sander lucioperca) reared with dry feed in net cages

Abstract

Pikeperch (Sander lucioperca) fingerlings, trained on dry feed, were kept in pond cages and fed with 2, 4 or 6% of their actual body weight in dry feed. The effect of the daily ration and the temperature of the pond water on the growth, survival, condition factor and feed conversion were observed in an 8-week experiment. The appropriate daily ration at 17-18°C was 2%, while at 24-25°C the 4% ration seemed to be advisable for the practice. The two higher rations led to significantly higher final body weights than the lowest feeding ration. There were no significant differences between the final condition factors or the survivals of the groups. The best feed conversion (FCR) was achieved at the 2% daily ration group and the worst at the 6% group in each week of the experiment.

Draining system and feeding rate during the initial development ofLophiosilurus alexandri(Steindachner, 1877),a carnivorous freshwater fish

“…However, an FCR between 0.85 and 1.53 (2 and 8% respectively) can be considered adequate for fish production, mainly for carnivorous species. Similar to these results, an increase in FCR with the rise of feeding rate was also found for other carnivorous species (Mihelakakis, Tsolkas & Yoshimatsu ; Bódis & Bercsényi ).…”

“…After feed training, the exclusive use of dry diet and understanding the best model of daily feeding are fundamental to adequately control the fish rearing process (Wang, Hayward & Noltie ). Furthermore, appropriate feeding rates result in better growth, feeding efficiency and the production of high quality meat (Harpaz, Hakim, Barki, Karplus, Slosman & Eroldogăn ; Cho, Lee, Park & Lee ; Bódis & Bercsényi ). Incorrect feeding practices can lead to an increase in the production costs and the accumulation of organic material in the aquatic environment (Azzaydi, Madrid, Zamora, Sánchez‐Vázquez & Martínez ; Jomori, Carneiro, Martins & Portella ).…”

Comparative genetic analysis of natural and farmed populations of pike-perch (Sander lucioperca)

“…However, environmental pollution, loss of habitat, and overfishing reduced the number of pikeperch in natural waters, thus consumer demands cannot be fulfilled (Hedrick and Miller 1992). To overcome the problem, several European research projects were initiated to developing production technologies and techniques (Abdolmalaki and Psuty 2007;Björklund et al 2007;Bódis and Bercsényi 2009;Menezes et al 2013;Zakeś et al 2013;Zarski et al 2013;Blecha et al 2016;Lappalainen et al 2016). Classical intensive breeding and rearing methods can only be used with strong limitations due to the high stress sensitivity of the species and its need for a relatively large territory (especially in the breeding season) which is probably due to the predatory nature of the species (Molnár et al 2004).…”