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  • Küçük Resim
    Öğe
    A preliminary study on protease activity of the northern pike (Esox lucius L. 1758) larvae
    (2012) Gökçek, Kaya; Naz, Mehmet; Szabo, Tamas; Urbanyi, Bela
    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.
  • [ N/A ]
    Öğe
    Prey selection and diet composition of larval pike, esox lucius l., 1758, in lake isaszeg, Hungary
    (Parlar Scientific Publications, 2017) Demirci, Sevil; Gokcek, Kaya; Bozkurt, Ahmet; Szabo, Tamas; Urbanyi, Bela
    Iii this study. Northern Pike larvae's digestive tract contents were examined inhabiting in Isaszeg reservoir lake. Hungary. In totally 19 thousand varieties of nutrients were found out. 12 of them derived from zooplankton and 7 of them from phytoplank- Ton. Northern Pike larvae's constitutive nutriment sources were zoological originated. Geometric Importance Index (Gil) were highest for Bosmina sp. with 1097.49 in this specie's larval nutrition. This was followed by Chydorus sp. (503.836) and Ther- mocyclops sp. (493.299) respectively. Pike starts to exogenous feeding at 12 mm length. In contrast to GII. Selectivity index (SI) were revealed that Ther- mocyclops sp. were preferred by pike larvae as the main food organism. © by PSP.
  • [ N/A ]
    Öğe
    PREY SELECTION AND DIET COMPOSITION OF LARVAL PIKE, ESOX LUCIUS L., 1758, IN LAKE ISASZEG, HUNGARY
    (Parlar Scientific Publications (P S P), 2017) Demirci, Sevil; Gokcek, Kaya; Bozkurt, Ahmet; Szabo, Tamas; Urbanyi, Bela
    In this study, Northern Pike larvae's digestive tract contents were examined inhabiting in Isaszeg reservoir lake, Hungary. In totally 19 thousand varieties of nutrients were found out, 12 of them derived from zooplankton and 7 of them from phytoplankton. Northern Pike larvae's constitutive nutriment sources were zoological originated. Geometric Importance Index (GII) were highest for Bosmina sp. with 1097.49 in this specie's larval nutrition. This was followed by Chydorus sp. (503.836) and Thermocyclops sp. (493.299) respectively. Pike starts to exogenous feeding at 12 mm length. In contrast to GII, Selectivity index (SI) were revealed that Thermocyclops sp. were preferred by pike larvae as the main food organism.