A preliminary study on protease activity of the northern pike (Esox lucius L. 1758) larvae
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Tarih
2012
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info:eu-repo/semantics/openAccess
Özet
Nispeten yüksek inkübasyon sıcaklığında kuluçkalanan Turna balığı pre-larvalarının proteolitik aktivitesi, besin keseli dönemden kritik ilk yem alma noktasına kadar ölçülmüştür. Yumurta açılım günü (DAH) olan 0. gün ile 12. günler arasında larvaların proteolitik aktiviteleri arasında istatistiksel olarak fark bulunmuştur (P<0,05). Turna larvalarının proteolitik aktivitesi DAH 0’da DAH 5’e kadar yavaşça yükselmiş, daha sonra DAH 6’dan DAH 8’e kadar ani bir yükseliş görülmüştür. Buna ek olarak, DAH 8’de bariz bir pik gözlenmiştir (595,22±9,07 U/mg protein). Lavaların tümü, besin kesesinin tükenmesini takiben 4. günde açlıktan ölmüştür. Sonuç olarak, doku yıkımını önlemek amacıyla, larvalar 13°C’deki kuluçkalama şartlarında, DAH 8’de besin kesesinin tükenmesini takiben hemen ilk yem verilmelidir.
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 (DAH) 0 to 12 were statistically significant (P<0.05). Protease activities of larvae remained slightly increased from DAH 0 to DAH 5. A sudden raise in protease activities of larvae were observed from the DAH 6 to the DAH 8. Moreover, the conspicuous increase in protease activities of pike larvae was determined at the DAH 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 DAH 8 at 13°C under controlled conditions.
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 (DAH) 0 to 12 were statistically significant (P<0.05). Protease activities of larvae remained slightly increased from DAH 0 to DAH 5. A sudden raise in protease activities of larvae were observed from the DAH 6 to the DAH 8. Moreover, the conspicuous increase in protease activities of pike larvae was determined at the DAH 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 DAH 8 at 13°C under controlled conditions.
Açıklama
Anahtar Kelimeler
Zooloji, Balıkçılık
Kaynak
Turkish Journal of Fisheries and Aquatic Sciences
WoS Q Değeri
Q4
Scopus Q Değeri
Cilt
12
Sayı
4
