A Preliminary Study on Protease Activity of the Northern Pike (<i>Esox lucius</i> L. 1758) Larvae

Gokcek K., Naz M., Szabo T., Urbanyi B.

TURKISH JOURNAL OF FISHERIES AND AQUATIC SCIENCES, cilt.12, sa.4, ss.947-950, 2012 (SCI-Expanded, Scopus, TRDizin) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 12 Sayı: 4
  • Basım Tarihi: 2012
  • Doi Numarası: 10.4194/1303-2712-v12_4_22
  • Dergi Adı: TURKISH JOURNAL OF FISHERIES AND AQUATIC SCIENCES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.947-950
  • Hatay Mustafa Kemal Üniversitesi Adresli: Evet

Özet

The proteolitic activity of northern pike prelarvae was measured in yolk sac stage to reveal the critical first feeding time at relatively high incubation temperature. The differences observed among protease activities of larvae from day after hatching (DAB) 0 to 12 were statistically significant (P<0.05). Protease activities of larvae remained slightly increased from DAH 0 to DAB 5. A sudden raise in protease activities of larvae were observed from the DAB 6 to the DAB 8. Moreover, the conspicuous increase in protease activities of pike larvae was determined at the DAB 8 (595.22 +/- 9-07 U/mg protein). All starving larvae died four days after yolk sac consumption. In conclusion, to prevent tissue breakdown, larvae should be fed immediately just after yolk sac absorption at the DAB 8 at 13 degrees C under controlled conditions.