Yazar "Hisar, O." seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • [ X ]
    Öğe
    Dietary supplementation with Mannanoligosaccharides (MOS) from Bio-Mos enhances growth parameters and digestive capacity of gilthead sea bream (Sparus aurata)
    (Wiley, 2011) Gultepe, N.; Salnur, S.; Hossu, B.; Hisar, O.
    Dietary mannanoligosaccharide (MOS) from commercial product, Bio-Mos supplementation, has been examined for its effects on weight gain and feed conversion of domestic mammals and birds, but very few studies have evaluated the responses of aquacultural species to MOS. A feeding and digestibility trial was performed to asses the potential beneficial effect of two levels of Bio-Mos on growth, feed utilization, survival rate and nutrients' digestion of gilthead sea bream (Sparus aurata) with an initial average weight of 170 g. Bio-Mos was added at 2 or 4 g kg(-1) to a fish meal-based control diet, and each diet was fed to triplicate groups of 1-year-old gilthead sea bream. After 12 weeks, there were no differences in survival rate among fish fed experimental diets (P > 0.05). It was observed that a significant improvability existed for both growth and feed utilization in fish fed diets supplemented with Bio-Mos (P < 0.05). Body proximate composition remained unaffected by Bio-Mos supplementation in fish fed experimental diets (P > 0.05). Apparent digestibility values for protein, carbohydrate and energy were appreciably affected by the inclusion of two different levels of Bio-Mos, only lipid digestibility was the exception. In conclusion, the results of this trial indicate that 2 g kg(-1) dietary supplementation with BIO-MOS seem to be most positive for gilthead sea bream production.
  • [ X ]
    Öğe
    Effects of dietary diludine supplementation on growth, proximate composition, muscle and texture structure of rainbow trout juveniles
    (Iranian Fisheries Science Research Inst-Ifsri, 2018) Hisar, O.; Karaoglu, M. M.; Hisar, S. A.; Yanik, T.; Gurkan, M.; Kaya, H.
    A feeding trial which lasted for eight weeks was conducted to investigate the effects of diludine, a growth promoter, on feed efficiency, muscle structure and proximate composition of juvenile rainbow trout. Diludine was added at 0.0(D-0) 0.2(D-1), 0.5(D-2) and 1(D-3) g kg(-1) to a casein-based diet, and every diet was given to the triplicated groups of juvenile rainbow trout. At the end of experiment, it was determined that a significant improvability existed for both growth and feed utilization in fish fed diets supplemented with diludine (p<0.05). Similarly, different concentrations of diludine affected the densitometric quantification of myofibrillar proteins in fish muscle according to results obtained by Sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE). The mean value of fiber diameters significantly increased in skeletal muscle with increasing concentrations of diludine. The histological results also showed hypertrophic adipocytes in skeletal muscle of fish fed D-2 and D-3 diets. The lowest elasticity values were observed in fish fed the control diet while those fed D-3 diet had highest elasticity values. On the other hand, no differences were found between fish fed experimental diets in terms of survival rate and all fish exhibited similar proximate composition for protein, lipid, moisture and ash. Consequently, it may be suggested that dietary diludine supplementaion up to 1 g kg(-1) concentration in the diets have positive impacts on growth of rainbow trout juvenils and the better growth in the fish fed with diludine supplements could be arise from muscle characteristics, in particular changes in fibres than proximate composition of the muscles.