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    Effects of Boron Supplementation of Adequate and Inadequate Vitamin D-3-Containing Diet on Performance and Serum Biochemical Characters of Broiler Chickens
    (W B SAUNDERS CO LTD, 2001) Kurtoğlu, V.; Kurtoğlu, F.; Coşkun, B.
    In this study, supplementation of two levels (5 and 25 parts per million; ppm) of boron into broiler diets including 125 IU kg(-1), (inadequate) and 2000 IU kg (1) (adequate) vitamin D-3 as investigated. The effects of supplementation on performance and biochemical characters (Ca, P, Mg, glucose and AP) of broilers from 1 to 45 days of age were evaluated. Boron provided significant increases in performances of chicks fed both adequate and inadequate vitamin D-3-containing diets. The improvements in the inadequate vitamin D-3-containing group were higher than that of adequate vitamin D-3-containing group. The boron addition had a positive effect on Ca, P and alkaline phosphatase levels of chicks. Boron might be regarded as beneficial in inadequate vitamin D-3-containing broiler feed.
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    Effects of Dietary Levels of Vitamin a on the Egg Yield and Immune Responses of Laying Hens
    (POULTRY SCIENCE ASSOC INC, 1998) Coşkun, B.; İnal, F.; Çelik, İ.; Erganiş, O.; Tiftik, A. M.; Kurtoğlu, F.; Kuyucuoğlu, Y.
    This research, which was designed and carried out as two consecutive experiments, investigated the effects of four different levels (0, 4,000, 12,000, and 24,000 IU/kg) of vitamin A supplementation on egg yield, plasma vitamin A levels, and immune responses of laying hens. Transmission of maternal immunity to their descendants was also studied. In the first experiment, egg yield, blood vitamin A levels, and various parameters of the immune system such as T lymphocyte levels in the peripheral blood, plasma cell counts in the spleen, and antibody titers against Newcastle Disease Virus (NDV) in the sera were investigated for a l-yr period. A total of 864 Hisex-brown laying hens were used in this experiment. The chicks were reared as commercial flocks until the 18th wk of age. No significant differences occurred among the parameters of the different diet groups. In the second experiment, maternal immunity was assessed in the chickens, supplied by hatching the eggs from hens in the first experiment. Maternal immunity was assayed by using the parameters as in Experiment 1. For this purpose, both blood and tissue samples were taken on the 2nd, 7th, and 10th d posthatch. Vitamin A supplementation had no significant effects on maternally, derived antibody titers or histologic structure of the lymphoid organs.
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    Influence of Melatonin Implantation on Sperm Quality, Biochemical Composition of the Seminal Plasma and Plasma Testosterone Levels in Rams
    (Ecole National Vet Toulouse, 2000) Kaya, A.; Başpınar, N.; Yıldız, C.; Kurtoğlu, F.; Ataman, M. B.; Haliloğlu, S.
    Influence of the melatonin implantation on sperm quality, plasma testosterone levels and biochemical composition of the seminal plasma was evaluated in rams in the breeding and non-breeding season. Melatonin administration during the non-breeding season improved progressive motility and morphologically normal sperm rates. The mean plasma testosterone level was significantly higher in melatonin treated animals compared to untreated ones. Fructose, sodium, calcium, magnesium levels, and aspartate aminotransferase and lactate dehydrogenase activity in the seminal plasma were similar in melatonin treated and control rams. In contrast, melatonin administration during the breeding season did not enhance spermatologic parameters and plasma testosterone levels. Biochemical composition of the seminal plasma was also comparable in melatonin treated and untreated control groups. In conclusion, melatonin administration during the breeding season did not influence sperm quality, plasma testosterone levels and biochemical parameters evaluated in this study.