Burak HAZMAN, CEMİL KAYA GÖKÇEK

The effect of different first feeds on proteolytic activity of the northern Pike, Esox lucius linneaus 1758, post- larvae

Turna, Esox lucius , balığı post-larvaları besin keselerinin tüken mesi takiben ilk on günlük dönemde alabalık mikro diet yemi, Artemia nauplii ve plankton ile beslenmiş ve post-larvaların proteolitik aktivitesi ölçülmüştür. Çalışmanın sonucunda, farklı tip besinlerin proteolitik aktivite üzerinde istatistiki açıdan önemli bir etkisinin olduğu tespit edilmiştir (P

Turna Balığı, Esox lucius linneaus 1758, post -larvalarının proteolitik aktivitesi üzerine farklı ilk beslemelerin etkisi

The 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 2 nd day in Artemia (228.22±15.44 U/mg ) and plankton (302.78±45.85 U/mg ) groups, and on 3 rd 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 8 th in Artemia and plankton group, but on the day 9 th 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.

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