EFFECTS OF SOME FACTORS ON GESTATION LENGTH IN HAMDANI, RED KARAMAN AND KARAKUL SHEEP

Year 2006, Volume: 32 Issue: 1, 29 - 35, 03.12.2012

Orhan Yılmaz Davut Bayram

Abstract

ABSTRACT

This study was carried out to investigate effects of breed, mating season, age of ewe, birth type, sex of lamb and birth weight on gestation length in Hamdani, Red Karaman and Karakul ewes. In the study, data on 259 lambings of Hamdani, Red Karaman and Karakul sheep were analyzed.

Gestation length for Hamdani, Red Karaman and Karakul ewes were 149.77+0.18, 148.76±0.15 and 147.79±0.19 days, respectively. Gestation length was affected by breed (P<0.01). Gestation lengths of mated ewes in different seasons were similar (P>0.05). Gestation lengths of 2-yr-old ewes (148.76±0.17) and 4-yr-old ewes (148.78±0.12) were similar (P>0.05). Gestation length of ewes which gave birth to single lambs (149.36±0.11) were longer than those which gave birth to twin lambs (148.18±0.21) (P<0.01). Gestation length of ewes giving birth to male lamb (149.17±0.14) were longer than those giving birth to female lamb (148.37±0.13) (P<0.01). The ewes which gave birth to heavier lamb had a longer gestation length (P<0.01). This study showed that the gestation length was affected by breed, sex of lamb, birth type and birth weight of lamb, and was not affected by mating season and age of ewe.

Keywords: Hamdani, Red Karaman, Karakul, Gestation length

 

HAMDANİ, MORKARAMAN VE KARAGÜL KOYUNLARINDA GEBELİK SÜRESİNE BAZI FAKTÖRLERİN ETKİSİ

ÖZET

Bu çalışma, Hamdani, Morkaraman ve Karagül koyunlarının gebelik süresi üzerine ırk, tohumlama mevsimi, koyunun yaşı, doğum tipi. kuzunun cinsiyeti ve doğum ağırlığının etkilerini araştırmak amacıyla yapılmıştır. Araştırmada, Hamdani. Morkaraman ve Karagül koyunlarının dogumlarına ait 259 veri analiz edilmiştir. Hamdani, Morkaraman ve Karagül koyunlarında gebelik süresi sırasıyla 149.77±0.18, 148.76±0.15 ve 147.79+0.19 gün olarak belirlenmiştir. Gebelik süresiıirk tarafından etkilenmiştir (P<0.01). Farklı mevsimlerde tohumlanan koyunların gebelik süresi benzer olmuştur (P>0.05). İki yaşlı koyunların gebelik süresi (148.76+0.17 gün) ile 4 yaşlı koyunların gebelik süresi (148.78±0.12 gün) benzer bulunmuştur (P>0.05). Tek doğum yapan koyunların gebelik süresi (149.36±0.11 gün), ikiz doğum yapan koyunların gebelik süresinden (148.18+0.21 gün) daha uzun sürmüştür (P<0.01). Erkek kuzu doğuran koyunların gebelik süresi (149.17+0.14 gün), dişi kuzu doğuran koyunların gebelik süresinden (148.37+0.13 gün) daha uzun olmuştur (P<0.01). Daha ağır doğum ağırlığına sahip kuzuların analarına ait gebelik süresi daha uzun sürmüştür (P<0.01). Bu araştırma gösteriyor ki, gebelik süresini ırk, kuzunun cinsiyeti, doğum tipi ve doğum ağırlığı etkilemiş, tohumlama mevsimi ve koyunun yaşı etkilememiştir.

Anahtar kelimeler: Hamdani. Morkaraman, Karagül, Gebelik süresi

Keywords

Hamdani. Morkaraman. Karagül, Gebelik süresi

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