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Tesema Z, Deribe B, Kefale A, et al. Survival analysis and reproductive performance of Dorper x Tumele sheep. Heliyon. 2020;6(4):e03840doi: 10.1016/j.heliyon.2020.e03840.
Tesema, Z., Deribe, B., Kefale, A., Lakew, M., Tilahun, M., Shibesh, M., Belayneh, N., Zegeye, A., Worku, G., & Yizengaw, L. (2020). Survival analysis and reproductive performance of Dorper x Tumele sheep. Heliyon, 6(4), e03840. https://doi.org/10.1016/j.heliyon.2020.e03840
Tesema, Zeleke, et al. "Survival analysis and reproductive performance of Dorper x Tumele sheep." Heliyon vol. 6,4 (2020): e03840. doi: https://doi.org/10.1016/j.heliyon.2020.e03840
Tesema Z, Deribe B, Kefale A, Lakew M, Tilahun M, Shibesh M, Belayneh N, Zegeye A, Worku G, Yizengaw L. Survival analysis and reproductive performance of Dorper x Tumele sheep. Heliyon. 2020 Apr 26;6(4):e03840. doi: 10.1016/j.heliyon.2020.e03840. eCollection 2020 Apr. PMID: 32373742; PMCID: PMC7191220.
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Heliyon. 2020 Apr 26;6(4):e03840. doi: 10.1016/j.heliyon.2020.e03840. eCollection 2020 Apr.

Survival analysis and reproductive performance of Dorper x Tumele sheep.

Heliyon

Zeleke Tesema, Belay Deribe, Alemu Kefale, Mesin Lakew, Mekonnen Tilahun, Mekonnen Shibesh, Negus Belayneh, Asres Zegeye, Getachew Worku, Liuel Yizengaw

Affiliations

  1. Sirinka Agricultural Research Center, P.O.Box 74, Woldia, Ethiopia.
  2. Amhara Agricultural Research Institute, P.O.Box 527, Bahir Dar, Ethiopia.
  3. Andasa Livestock Research Center, P.O.Box, 27, Bahir Dar, Ethiopia.

PMID: 32373742 PMCID: PMC7191220 DOI: 10.1016/j.heliyon.2020.e03840

Abstract

Productivity and profitability of sheep farming are highly influenced by lamb survival and ewe reproductive performance. Thus, this study was conducted to evaluate the survival and reproductive performance of crossbred sheep. Data collected from 2009 to 2018 from Sirinka sheep breeding stations were utilized for this study. Survival analysis was conducted by using Survival Kit 6.12 software with the Weibull model and the general linear model of SAS 9.0 was used to analyze reproductive traits. The overall mean survival rate of Dorper x Tumele crossbred lambs at 3, 6 and 12 months of age were 86.0, 76.6, and 67.9%, respectively. About 46.8% of mortality from the total death was observed during the first 120 days of life. Gastrointestinal parasites, pneumonia and septicemia were the major causes of lamb mortality. Birth weight, birth type, sex and year of lambing were the most important risk factors for survival of crossbred lambs. The overall least-squares means for litter size at birth, litter size at weaning, total litter weight at birth and total litter weight at weaning were 1.10 lambs, 0.94 lambs, 3.28 kg and 15.5 kg, respectively. Birth type, sex and year of lambing were the most determinants of ewe productive traits. Tumele and their crossbred sheep had good mothering ability necessary to successfully raise lambs to weaning. The current crossbreeding program which aims to improving growth performance had a positive influence on the survival rate of lambs. Improvement of environmental in the flock, special care for small lambs and indirect selection based on birth weight would lead to further survival improvement.

© 2020 The Author(s).

Keywords: Crossbreeding; Diseases; Fitness traits; Mothering ability; Risk factors

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