Yazar "Ataman, M. B." seçeneğine göre listele

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    The Effect of Misoprostol and Valethamate Bromide Administered Before Insemination With Frozen-Thawed Semen on Cervix Dilatation and Fertility in Sheep
    (Indian Veterinary Journal, 2000) Ataman, M. B.; Kaya, A.; Yıldız, C.; Düzgün, H.
    [Abstract not Available]
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    Effect of Parity on Oestrus Synchronization Success in Cows
    (Ecole Nationale Veterinaire Toulouse, 2006) Bülbül, B.; Ataman, M. B.
    The objective of the present study wits to evaluate the effect of parity on pregnancy rate in lactating Holstein cows Subjected to different synchronization protocols. A total of 96 cows (49 primiparous and 47 multiparous) were allocated randomly into four groups containing primiparous and multiparous COWS. In the PRID group (n=23), progesterone releasing intravaginal device (PRID) was inserted into anterior vagina of the cows. The devices Were removed 12 days later and 500 mu g of cloprostenol was intramuscularly administered the day before PRID withdrawal. In the Implant group (n=25), ear implants releasing norgestomet were Subcutaneously g inserted in the Car of each cow for 9 days and 500 mu g of cloprostenol was intramuscularly administered the day before the implant removal. In the GnRH group (n=24), buserelin, a GnRH analogue 10 mu g was given oil day 0 followed by the administration of 500 mu g of cloprostenol, 7 days later. In the PGF(2 alpha) group (n=24), two intramuscular administrations of 500 mu g of cloprostenol were performed at an 11-day interval. All cows exhibited oestrus signs between 36 and 124 h after the last PGF(2 alpha) administration. Mean overall pregnancy rate of the cows from the GnRH group Wits lower that that of the cows from the PRID, Implant and PGF(2 alpha) groups which were 86.9%, 72.0%1 54.2% and 83.3%, respectively. Mean pregnancy rates of the primiparous cows were not influenced by the treatment and were 83.3%, 73.3% 63.6% and 81.8% in the PRID. Implant, GnRH and PGF(2 alpha) groups. Mean pregnancy rate of the multiparous cows of the GnRH group (46.1%) was lower than that of the cows from the PRID (90.9%), and PGF(2 alpha) (84.6%) groups but was not different from that observed for the Implant group (70.0%). In conclusion. the synchronization protocols associating progesterone and PGF(2 alpha) or 2 PGF(2 alpha) administrations were more efficient than the treatment associating buserelin and PGF(2 alpha) whatever the cow's parity.
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    Induction of synchronized oestrus in akkaraman cross-bred ewes during breeding and anestrus seasons: the use of short-term and long-term progesterone treatments
    (ECOLE NATIONALE VETERINAIRE TOULOUSE, 2006) Ataman, M. B.; Aköz, Mehmet; Akman, Orhan
    The objective of this trial was to compare the efficacy of short-term and long-term progesterone treatments to induce ovarian activity of sheep both during breeding and anestrus seasons. The experiment was performed at two periods, during the breeding and the anestrus seasons on 2 different groups of 30 ewes. During each period, the ewes were randomly allocated to 2 groups of 15 ewes which received a short term (7 days) or a long term (12 days) progesterone treatment, respectively. The progesterone treatment consisted on a vaginal sponge containing 30 mg fluorogestone acetate (FGA) inserted into the vagina of the ewes for 7 or 12 days. Triaprost tromethamine, an analogue of PGF(2 alpha), was intramuscularly administered to all ewes at the moment of the sponges withdrawal. Afterwards, 400 IU of PMSG were intramuscularly administered to all the ewes. Mean percentage of estrous, pregnant and lambing sheep were 100%, 86.7 % and 80% in both the short term and the long term treated groups during the breeding season. The mean litter did not differ between the short term and the long term treated groups (1.8 vs 1.7). During the anestrus season, the mean percentage of estrous, pregnant, lambing sheep and mean litter size were 86.6%. 76.9%. 61.5% and 1.5 in the long term treated group and 93.3%. 85.7%. 71.4% and 1.5 in the short term treated group, respectively. The short-term progesterone treatment was effective to synchronize oestrus in sheep during both breeding and anestrus seasons.
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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.
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    Lycopene and resveratrol improve post-thaw bull sperm parameters: sperm motility, mitochondrial activity and DNA integrity
    (WILEY-BLACKWELL, 2015) Bucak, M. N.; Ataman, M. B.; Baspinar, N.; Uysal, O.; Taspinar, M.; Bilgili, A.; Ozturk, C.
    We focussed on evaluating the protective effect of lycopene and resveratrol on post-thaw bull sperm and oxidative stress parameters. Nine ejaculates for each bull were used in the study. Each ejaculate, splitted into three equal aliquots and diluted at 37 degrees C with base extenders containing lycopene (1x10(-3)gml(-1)) and resveratrol (1mm), and no antioxidant (control), was cooled to 5 degrees C and then frozen. Frozen straws were thawed in a water bath for evaluation. The supplementation of the semen extender with lycopene and resveratrol increased the percentages of post-thawed computer-assisted sperm analysis (CASA) motility (55.8 +/- 3.8 and 61.9 +/- 4.0%) and progressive motility (38 +/- 2.4 and 37 +/- 8.8), compared with the controls (50.7 +/- 2.65 and 33.3 +/- 3.74%, respectively, P<0.05). Resveratrol provided a higher ALH (4.3 +/- 0.1), in comparison with the control (3.9 +/- 0.3, P<0.05). The supplementation of the semen extender with lycopene and resveratrol produced a higher mitochondrial activity (24.6 +/- 2.9 and 30.1 +/- 6.5% respectively), compared with that of the control (11.8 +/- 9.5%, P<0.05). It was determined that both antioxidants resulted in a lower percentage of sperm with damaged DNA than that of the control (P<0.05). Sperm motion characteristics except for ALH, acrosome integrity, sperm viability and oxidative stress parameters were not affected by the adding of lycopene and resveratrol.
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    Ovulation Induction With Human Chorionic Gonadotropin (hCG) and Gonadotropin Releasing Hormone (GnRH) in Mares
    (INDIAN COUNC AGRICULTURAL RES, 2000) Ataman, M. B.; Günay, A.; Uzman, M.; Günay, U.
    In this study, the efficacy of human chorionic gonadotropin (hCG) and gonadotropin releasing hormone (GnRH) administered to advance the ovulation in oestrous in mares was examined. Thoroughbred mares (36) were divided into 3 groups. After the detection of (35 mm follicle in diameter, with the use of ultrasound, 3000 IU hG, 40mg busereline, GnRH and 2 mi placebo were injected to the mares in groups I, 2 and 3 respectively. Follicles were monitored every 12 hr with ultrasonography until the occurrence of ovulation. The mares were mated naturally every other day by the end of oestrus. Pregnant mares were determined using B-mode real time ultrasound on day 20 after last mating. There was a statistical significance of(P<0.0 If between groups 1 and 3, and also 2 and 3 on the average ovulation time and numbers of mating required per conception. On the other hand, the differences of the pregnancy rates among the groups were not significant. In conclusion, hCG and GnRH could be used for inducing ovulation in cyclic mares.
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    Synchronization of estrus with short- and long-term progestagen treatments and the use of GnRH prior to short-term progestagen treatment in ewes
    (ELSEVIER, 2009) Karaca, F.; Ataman, M. B.; Coyan, K.
    The objective of the present study was to determine the efficacy of the synchronization of estrus using short- and long-term progestagen treatments in ewes at the onset of the breeding season, and to evaluate the effect of the exogenous GnRH administration immediately prior to short-term progestagen treatment on the reproductive performance. A total of 240 Tahirova cross-bred ewes, aged 18-24 months, and 40 rams, aged 2-4 years-old, were used in the trial. Ewes were divided equally into 3 groups (n=80 per group). Intravaginal progestagen sponges containing FGA (30 mg) were inserted in the ewes for 7 d in the FGA1 (short-term) and GnRH treatment groups, and for 12d in the FGA2 group (long-term). The ewes in the GnRH group received 10.5 mu g busereline acetate i.m. at the time of sponge insertion. Tiaprost tromethamol (PGF(2 alpha),; 0.294 mg) and eCG (400 IU) were injected i.m. on the 6th day of progestagen treatment in the GnRH and FGA1 groups, and on the 11 th day in the FGA2 group following sponge insertion. All ewes were hand-mated once at the detection of estrus. The estrous response, fertility rate, multiple birth rate and litter size recorded was 88.7, 87.3,51.6% and 1.6 in the FGA1 group, 92.5, 71.6, 50.9% and 1.5 in the FGA2 group, and 96.2, 89.6, 71.0% and 1.8 in the GnRH group, respectively. No significant difference in estrous response between the groups was recorded, but the fertility rate in the FGA1 and GnRH groups was significantly (P<0.05) higher than in the FGA2 group. The occurrence of multiple births and litter sizes were significantly (P<0.05) higher in the GnRH group, compared to both the FGA1 and FGA2 groups, with the number of single lambs being significantly (P<0.05) higher in the FGA1 (48.4%) and FGA2 (49.0%) groups than in the GnRH (29.0%) group. However, the differences recorded between any of the groups in terms of the number of twin and triplet lambs were insignificant. In conclusion, it can be said that estrous synchronization using the 12-d-FGA-eCG-PGF(2 alpha) regimen could be replaced with the 7-d-FGA-eCG-PGF(2 alpha) regime in sheep at the onset of the breeding season. However, the combination of GnRH with the latter regimen (7-d-GnRH-FGA-eCG-PGF(2 alpha)) increased the multiple birth rate and litter size in the ewes. (C) 2008 Elsevier B.V. All rights reserved.