Hazman, BurakGokcek, Kaya2024-09-182024-09-1820141303-2712https://doi.org/10.4194/1303-2712-v14_4_04https://hdl.handle.net/20.500.12483/11405The Northern Pike, Esox lucius, post-larvae were fed with trout micro diet, Artemia nauplii and plankton at the first ten days after yolk - sac absorption and the proteolytic activity of the post-larvae were measured. According to the results, the proteolytic activity was significantly affected by the different type of first feed (P<0.05). The highest protease activities were obtained on 2nd day in Artemia (228.22 +/- 15.44 U/mg) and plankton (302.78 +/- 45.85 U/mg) groups, and on 3rd day in micro diet (202.05 +/- 19.79 U/mg) group. After this point, the enzymatic activity started to decrease in all groups. Thereafter, the conspicuous increase in protease activities of larvae was determined on the day 8th in Artemia and plankton group, but on the day 9th in micro diet group (P<0.05). In contrast to other feeding groups, it is observed that feeding pike post-larvae with plankton caused more positive effect on proteolytic activity than the other groups.eninfo:eu-repo/semantics/openAccessNorthern pikeontogenypost-larvaefirst feedingproteolytic activityArticle14487587810.4194/1303-2712-v14_4_042-s2.0-84926616387Q2WOS:000353448400004Q4