Effect of live weight and age of Akkaraman ewes at mating on multiple birth rate, growth traits, and survival rate of lambs

This study was performed in order to determine the effect of live weight (LW) and age of Akkaraman ('White Karaman', WK) ewes at mating on the multiple birth rate (MBR), growth traits, and survival rate (SR) of lambs in breeder flocks. In the trial, data of 4452 head of ewes and 5324 head of lambs obtained from 16 WK breeder flocks in Konya Province were used. One week before the mating season ewes were weighed and separated into 5 groups according to their LW. In the research, the differences of MBR, the SR of lambs until days 60 and 120, the birth weight (BW), and the average LWs at days 60 and 120 between the groups were found to be statistically significant. It was determined that the MBR, the SR of lambs, the BW, and the average LWs at days 60 and 120 increased directly proportional to the LW increase of WK ewes at mating. Ewe's age affected MBR significantly and the MBR of ewes of ages 2 and 3 was lower (P < 0.01) than those of other age groups. However, ewe's age did not affect SR up to days 60 and 120, BW, or growth of lambs.

Anahtar Kelimeler:

Key words: White Karaman ewe, multiple birth rate, growth, survival rate

Effect of live weight and age of Akkaraman ewes at mating on multiple birth rate, growth traits, and survival rate of lambs

Keywords:

multiple birth rate, growth, survival rate, White Karaman ewe,

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Binns SH, Cox IJ, Rizvi S, Green LE. Risk factors of lamb mortality of UK sheep farms. Prev Vet Med 2002; 52: 287–303. Morris CA, Hickey SM, Clarke JN. Genetic and environmental factors affecting lamb survival at birth and through to weaning. New Zeal J Agr Res 2000; 43: 515–524.
Thomson BC, Muir PD, Smith NB. Litter size, lamb survival, birth and twelve week weight in lambs born to cross-bred ewes. Proceedings of the New Zealand Grassland Association 2004; 66: 233–237.
Gordon IR. Controlled Reproduction in Sheep and Goats. Wallingford, UK: CAB International; 1997.
Vatankhah M, Salehi SA. Genetic and non-genetic factors affecting Lori-Bakhtiari ewe body weight and its relationship with productivity. Small Ruminant Res 2010; 94: 98–102.
Gunn RG, Doney JM. Fertility in Cheviot ewes. 1. The effect of body condition at mating on ovulation rate and early embryo mortality in North and South Country Cheviot ewes. Anim Prod 1979; 29: 11–16.
Thomson, EF, Bahhady FA. A note on the effect of live weight at mating on fertility of Awassi ewes in semiarid north-west Syria. Anim Prod 1988; 47: 505–508.
Atti N, Theriez M, Abdennebi L. Relationship between ewe body condition at mating and reproductive performance in the fat-tailed Barbarine breed. Anim Res 2001; 50: 135–144.
Molina A, Gallego L, Torres A, Vergara H. Effect of mating season and level of body reserves on fertility and prolificacy of Manchega ewes. Small Ruminant Res 1994; 14: 209–217.
Gaskins CT, Snowder GD, Westman MK, Evans M. Influence of body weight, age and weight gain on fertility and prolificacy in four breeds of ewe lambs. J Anim Sci 2005; 83: 1680–1689. Akçapınar H, Özbeyaz C. Hayvan Yetiştiriciliği Temel Bilgileri. 1st ed. Ankara, Turkey: Kariyer Matbaacılık Ltd.; 1999 (book in Turkish).
Filya, İ, Karabulut A, Akgündüz V. Koç katımı ve gebeliğin son dönemindeki besleme düzeyinin koyunlarda döl verimi ile kuzularda büyüme ve yaşama gücü üzerine etkileri. In: Hayvancılık 96 Ulusal Kongresi. İzmir, Turkey: Ege Üniversitesi; 19 pp. 248–256 (congress proceeding in Turkish). Kaymakçı M. İleri Koyun Yetiştiriciliği. 2nd ed. İzmir, Turkey: Ege Üniversitesi Yayınları; 2006 (book in Turkish).
Ray EE, Smith SL. Effect of body weight of ewes on subsequent lamb production. J Anim Sci 1966; 25: 1172–1175.
Aliyari D, Moeini MM, Shahir MH, Sirjani MA. Effect of body condition score, live weight and age on reproductive performance of Afshari ewes. Asian J Anim Vet Adv 2012; 7: 904–909.