| Yazarlar (8) |
Uğur Şen
Ondokuz Mayıs Üniversitesi, Türkiye |
Prof. Dr. Emre ŞİRİN
Kırşehir Ahi Evran Üniversitesi, Türkiye |
|
Hasan Önder
Ondokuz Mayıs Üniversitesi, Türkiye |
|
Cem Tırınk
Türkiye |
|
Aycan Mutlu Yağanoğlu
Türkiye |
|
Saule Bostanova
|
|
Rashit Uskenov
|
|
Thobela Louis Tyasi
|
| Özet |
| Seasonal variations significantly impact lambs’ birth weight and post-natal growth of lambs, yet the underlying physiological mechanisms remain insufficiently explored. Therefore, this study examined the effects of mating season on lamb birth weight, placental characteristics, maternal concentrations of insulin-like growth factors (IGFs) in plasma, and placental mRNA expression levels of IGFs in Akkaraman ewes reared under extensive conditions. Ewes were mated in the breeding season (September; n = 35) and out-of-breeding season (April; n = 27). Blood samples were taken from the jugular vein of all ewes using a vacutainer in sterile heparin tubes every month from mating to parturition. Post-lambing, both dam and lamb weights were recorded, and placental characteristics were documented within 12 hours of parturition in both seasons. The number and weight of cotyledons were higher () in ewes mated during the breeding season than those mated during the out-of-breeding season. Also, ewes mated during the breeding season demonstrated thicker large cotyledons (). Although placental and cotyledonal efficiencies were similar in both mating seasons, volumetric cotyledon efficiency was higher () in ewes mated during the out-of-breeding season than in those bred during the breeding season. Additionally, ewes mated in the breeding season exhibited higher plasma concentration of IGF-I at three months of gestation than ewes mated in the out-of-breeding season (123.8 ± 9.8 vs. 99.3 ± 11.4 ng/ml, respectively; ). Although the mating season did not affect the IGF-I gene’s placental mRNA expression levels, the IGF-II gene’s … |
| Anahtar Kelimeler |
| Makale Türü | Özgün Makale |
| Makale Alt Türü | ESCI dergilerinde yayınlanan tam makale |
| Dergi Adı | Veterinary Medicine International |
| Dergi ISSN | 2090-8113 Wos Dergi Scopus Dergi |
| Dergi Tarandığı Indeksler | Web of Science (Clarivate Analytics) |
| Makale Dili | Türkçe |
| Basım Tarihi | 02-2024 |
| Cilt No | 2024 |
| Sayfalar | 1 / 11 |
| Doi Numarası | 10.1155/2024/5528453 |
| Makale Linki | http://dx.doi.org/10.1155/2024/5528453 |
