Yazar "Tekeli, Tevfik" seçeneğine göre listele

Listeleniyor 1 - 3 / 3
  • Küçük Resim
    Öğe
    Geç emriyonal ve erken fötal dönemde Konya merinosu koyunlarda gebelik tanısı ve fötal sayım amacıyla transabdominal ultrasonografik muayene tekniğinin etkinliğinin değerlendirilmesi
    (2008) Erdem, Hüseyin; Sarıbay, Mustafa Kemal; Tekeli, Tevfik
    Sunulan çalışmada Konya Merinosu ırkı koyunlarda gebelik tanısı ve fötal sayım amacıyla geç embriyonal ve erken fötal dönemde sağ (R) ve sol (L) inguinal bölgeden yapılan transabdominal ultrasonografik muayenenin (TAUM) etkinliğinin belirlenmesi amaçlandı. Bu amaçla aşım sonrası 34. günde transrektal ultrasonografik muayene (TRUM) ile 45 baş tek ve 39 baş ikiz embriyo taşıyan gebe koyun belirlendi. Toplam 84 baş gebe koyun 34 ve 50. günlerde, RTAUM ve LTAUM yoldan farklı saatlerde muayene edilerek, bulgular TRUM ve doğum kayıtları ile karşılaştırıldı. TRUM ve doğum kayıtlarına göre 34. günde tekli gebelik RTAUM ve LTAUM olarak sırasıyla % 62 (28/45) ve % 64 (29/45), 50. günde de sırasıyla % 88 (40/45) ve % 91 (41/45) oranında doğru olarak belirlendi. İkiz gebelikler ise RTAUM ve LTAUM olarak 34. günde sırasıyla % 33 (13/39) ve % 28 (11/39) oranında belirlenebilirken; 50. günde sırasıyla % 53 (21/39) ve % 46 (18/39) oranında doğru olarak belirlendi. Bulgulara göre gerek muayene günleri ve gerekse muayene bölgeleri arasında istatistiki farklılık görülmedi. Sonuç olarak ultrasonografik muayenede ikiz gebeliklerin ilk 50 günde RTAUM ve/veya LTAUM olarak yüksek oranda belirlenemediği; fötal sayımın önemli olmadığı durumlarda ise muayenelerin 34. günden itibaren transabdominal (TA) yolla yapılabileceği kanısına varıldı.
  • Küçük Resim
    Öğe
    In vitro culture of in vivo Saanen goat embryos by vitrification
    (2016) Köse, Ayşe Merve; Tekeli, Tevfik
    The purpose of this study was to investigate the survival rate of high-quality embryos (n: 101) derived in vivo from Saanen goats (n: 15) in culture following their vitrified freezing and thawing during the breeding season. The in vitro postthaw survival rates of 101 vitrified embryos at 24, 48, and 72 h were 59.4%, 33.6%, and 25.7%, respectively. According to the developmental stage of the embryos, the survival rates were 51.3%, 20.5%, and 15.4% in the morula, and 64.5%, 41.9%, and 32.3% in the blastocyst, respectively. The survival rates of the blastocysts and morulae at 48 and 72 h were significantly different (P < 0.05). While the survival rates of the embryos of Grade 1 quality at 24, 48, and 72 h were 78.6%, 46.4%, and 32.1%, Grade 2 quality survival rates were 35.5%, 17.8%, and 17.8%, respectively. The survival rates of Grades 1 and 2 embryos at 24 h (P < 0.001) and 48 h (P < 0.05) were significantly different. As a result, it was concluded that the embryos to be frozen should be selected according to their development stage and quality, and preferably should be of Grade 1 quality in the blastocyst stage for the cryopreservation of in vivo-derived goat embryos by vitrification.
  • [ N/A ]
    Öğe
    Investigation of the effect of a progesterone free superovulation protocol on embryo yield and quality in goats
    (Mehria Publishers, 2017) Çizmeci, Sakine Ülküm; Köse, Ayşe Merve; Güler, Mehmet; Tekeli, Tevfik
    The main objective of the present study is to determine the effects of progesterone and progesterone-free superovulation protocols on embryo count and quality in goats. The animal material of the study is consisted of 1-3-year-old 22 goats and 3 bucks. During the breeding season, the goats were divided into two groups of 11, and superovulation was applied. In the control group, goats were synchronized with intravaginal sponges containing 20 mg of fluorogestone acetate for 12 days. Four days after oestrus in the experimental group and on the 9th day after sponge application in control group decreasing doses of FSH (Follicle stimulating hormone) (50; 30; 20 mg) were injected intramuscularly at 12 hour intervals. The sponge was removed on the 12th day in the control group. In both groups, oestrus was observed 24 hours after the fifth dose of FSH and the uterus flushing was performed on the 7th day after mating. In the study, superovulation response was obtained 100% in control group and 25% in experimental group. The recovery rate and transferable embryos were determined 61.5; 82.81 and 23.3%; 71.43% respectively and there was no difference between the groups (P > 0.05). In the non-progesterone-applied group of animals, it was observed that the cycle cannot be fully dominated, sufficient progesterone level could not be reached and gonadotropin application was, therefore, insufficient. Although progesterone administration is thought to have a negative effect on embryo quality, applying a superovulation by using progesterone has been shown to be more successful on superovulation and embryo collection rates. © 2017 IJVS.