cjs-200404-0005 ArticleInAPeriodical 2004 Czech Journal of Animal Science 49 4 156-163 ZakesZ. PrzybylA. WozniakM. SzczepkowskiM. MazurkiewiczJ. Growth performance of juvenile pikeperch, Sander lucioperca (L.) fed graded levels of dietary lipids The aim of the experiment was to determine the effect of graded lipid content in experimental isoprotein feed (6, 10, 14% lipids and 45% protein) on the growth performance of juvenile pikeperch (initial body weight P < 0.05). Feed conversion ratio (FCR) and protein efficiency ratio (PER) attained the most advantageous values in this group of fish. The application of the experimental feed had a significant effect on the lipid values in fish bodies and viscera (P < 0.05) although no relationship was detected between the lipid content of the feed and that of the fish muscles. The lipid content was approximately 7.7% in all the experimental groups and the differences between the groups were statistically insignificant (P > 0.05).