Sivas Cumhuriyet Üniversitesi Veteriner FakültesiFaculty of Veterinary Medicinehttps://hdl.handle.net/20.500.12418/1282024-03-29T05:53:59Z2024-03-29T05:53:59ZThe Effect on Reproductive Performance of Different Synchronization Methods Applied in Early Postpartum Process that Kangal Sheep Lambing in the Breeding SeasonTakcı, AbdurrahmanKıvrak, Mehmet Buğrahttps://hdl.handle.net/20.500.12418/151412024-03-12T08:18:14Z2022-01-01T00:00:00ZThe Effect on Reproductive Performance of Different Synchronization Methods Applied in Early Postpartum Process that Kangal Sheep Lambing in the Breeding Season
Takcı, Abdurrahman; Kıvrak, Mehmet Buğra
In recent years, increased costs pushes the sheep breeders. As for Kangal sheep breeders, they completely given
up milk and wool production. Because they build their only income on lamb reproduction, they are trying to
existence in this tough environment. The material of the study consisted of 160 multiparous (multiple-lambing)
sheep and 16 rams used in mating, which conceived out of season (mated in spring), gave birth in SeptemberOctober, and suckled their lambs for about 60-75 days. Animals in group 1 (n:60) were given 1st Prostaglandin
F2 α (PGF2α) injection on day 0, and Equine chorionic gonadotropin (eCG 500 IU) was injected simultaneously
with 2nd PGF2α (263 µg Cloprostenol sodium) on day 9th. Animals in group 2 (n:55) were given simultaneous
injections of PGF2α and eCG (500 IU) on day 0, and a second injection of PGF2α was administered on day 7.
Animals in group 3 (n:37) were injected with a double dose of PGF2α every 9 days. The efficacy of these
applications on reproductive parameters such as oestrus, conception, multiple conception, embryonic death,
number of births, number of offspring and fertility were evaluated. The difference between different
synchronization methods on estrus, pregnancy, embryonic death, birth and number of offspring was not
statistically significant (p >0.05). Multiple pregnancies in Group 2 were statistically higher than Group 3
(P=0.048). Considering the number of lambs per birth (productivity) in the groups, it was found as 1.3333, 1.5278
and 1.1667 in Group1, Group 2 and Group 3, respectively. In the statistical evaluation, the productivity of Group
2 was found to be significantly higher than Group 3 (P = 0.03). In the light of these results, it was determined
that by reducing the double dose PGF2α application interval to 7 days with standard 9-day intervals in the Kangal
breed, multiple pregnancy and lamb productivity per pregnancy could be increased with the combination of eCG
in the first application. It was concluded that this application may be a synchronization method that will increase
reproductive efficiency in the breeding season
2022-01-01T00:00:00ZModifiye U-synch Protokolü ile Mevsim Dışı Senkronize Edilen Akkaraman Kangal Irkı Prepubertal Kuzu ve Primipar Koyunlara GnRH ve hCG Uygulamalarının Fertilite Üzerine EtkisiTakcı, Abdurrahmanhttps://hdl.handle.net/20.500.12418/151402024-03-12T08:04:40Z0008-01-01T00:00:00ZModifiye U-synch Protokolü ile Mevsim Dışı Senkronize Edilen Akkaraman Kangal Irkı Prepubertal Kuzu ve Primipar Koyunlara GnRH ve hCG Uygulamalarının Fertilite Üzerine Etkisi
Takcı, Abdurrahman
Sheep are seasonally polyestrous. Our native genetic source Akkaraman-Kangal breed sheep show sexual activity only in breeding season (months of fall)
throught year too. Diffirent induction methods are needed to produce lamb out of breeding season). For this purpose, the study conducted on 3 groups
which involve 15 prepubertal ewe lamb (10-14 months of age) and 10 primiparous ewe (55-70 days of postpartum) in deep anestrous (may-june). Each
group was recieved 100 µg gonadorelin diacetate tetrahydrate (GnRH) together with progestrone including sponge (20 mg flugeston acetate). Sponge
was out 7 days (7th Day) later following 131,5 µg PGF2α and 600 IU eCG injection. 100 µg gonadorelin diacetate tetrahydrate (GnRH), 600 IU hCG and
2 ml sterile saline solution was injected to group 1, 2 and 3 respectively at the 56th hour following sponge out. Ram were introduced to the groups for 5
days after injection (between 10-15th days). Progestrone levels, Estrous and pregnancy rate were evaluted. Significant diffirences was not observed
between groups. Reproductive efficiency of the modified U-synch method found to be smilar in prepubertal ewe lambs and primiparous ewes. In
conclusion, it was determined that a reasonable pregnancy rate can be achieved with modified U-synch method in Akkaraman-Kangal prepubertal ewe
lambs and primiparous ewes.
0008-01-01T00:00:00ZEffect of additional progesterone treatment during intravaginal progesterone priming in anestrous ewesTakcı, AbdurrahmanKıvrak, Mehmet Buğrahttps://hdl.handle.net/20.500.12418/151392024-03-12T08:03:19Z0001-01-01T00:00:00ZEffect of additional progesterone treatment during intravaginal progesterone priming in anestrous ewes
Takcı, Abdurrahman; Kıvrak, Mehmet Buğra
Oestrus induction with intravaginal progesterone is the most preferred method in anoestrus sheep. In
previous studies it was argued that the decrease in the progesterone level before the sponge is removed reduces
the efficiency. This study aimed to test the hypothesis that additional progesterone treatment during the
progesterone priming in anestrous ewes could increase the reproductive efficiency of the induction. The study
conducted on 261 Kangal sheep, which were pregnant in autumn and gave birth in spring and breastfed their
lambs for about 60-75 days. All animals included in the study were randomly divided into 3 different groups
as P-7 (n = 86), P-8 (n = 80) and control (n = 95). At the beginning of the study a progesterone impregnated
sponge was placed to all ewes (Day 0). During sponge treatment, an injection of progesterone was given to
P-7 and P-8 group 7 and 8 days after the was sponge placed, respectively. As for control group, no additional
progesterone was given during sponge treatment. All groups received 500 IU pregnant mare serum gonadotropin
at the sponge withdrawal. Ram was introduced to all ewes the 10th days of the study. There was no difference
between the groups in terms of estrus rate (P = 0.28), pregnancy rate (P = 0.32) and multiple pregnancy rates
(P = 0.38) (P = 0.28). We considered that the main reason for unexpected low progesterone concentration at
the end of the treatment might be the result of high feed intake and metabolic rate. On the other hand, this
additional dose could be caused by an excessive increase in progesterone levels in the sheep, which could be
the reason for the decrease in reproductive parameters. Additional progesterone support during progesteronebased synchronization yielded acceptable results. However, progesterone can be administered in injection form
in the earlier days of synchronization or before sponge insertion to obtain better results.
0001-01-01T00:00:00ZDetermination of the causative agent of periparturient period interdigital dermatitis that adversely affects reproduction and milk production in cows by MALDI-TOFTakcı, AbdurrahmanMoğulkoç, Mahmut NiyaziSancak, TunahanKıvrak, Mehmet Buğrahttps://hdl.handle.net/20.500.12418/151382024-03-12T08:02:50Z0001-01-01T00:00:00ZDetermination of the causative agent of periparturient period interdigital dermatitis that adversely affects reproduction and milk production in cows by MALDI-TOF
Takcı, Abdurrahman; Moğulkoç, Mahmut Niyazi; Sancak, Tunahan; Kıvrak, Mehmet Buğra
In recent years, problems associated with high milk yield in dairy cows have increased
considerably. Today, interdigital dermatitis (ID) is one of the most significant problems across
the dairy industry, threatening animal health and welfare and inducing serious productivity
losses. The etiology and mechanism of damage caused by this disease, which disrupts quality
of life, milk yield, and reproduction, have not yet been fully understood. In order to achieve
the study objectives, 40 biparous cows (3 years old – second calving) that had lameness
associated with ID from prepartum day 30 to postpartum day 60 (Study group) and 40
biparous cows (3 years old) without lameness symptoms during the specified period (Control
group) constituted the material of the present study. There was no difference in the levels of
non-esterified fatty acids in the blood samples collected from those animals during the dry
period (45-60 days before parturition; P=0.38). There were differences between the groups
in certain parameters, including beta-hydroxybutyric acid level in the postpartum period,
weight loss in the first month, number of ovarian cysts in the first 60 days, milk production
in the first month, and the first corpus luteum determination process. (P<0.001) There was
no difference between the groups in terms of reproductive parameters (mode of delivery,
litter viability, litter weight, litter weight, expulsion of membranes, etc.) and presence of
infection (acute puerperal metritis) during birth (P>0.05 for all parameters). In addition to
all of the above, Wohlfahrtiimonas chitiniclastica bacteria were isolated for the first time in
microbiological samples collected from ID, which is a significant condition for dairy cows
during the periparturient stage, contributing to the etiology of the disease, which has not
been understood so far
0001-01-01T00:00:00Z