跳至主要内容

Reproductive Performance and Mortality Rate in Local and Dorper × Local Crossbred Sheep Following Controlled Breeding in Ethiopia

Read full paper at:
http://www.scirp.org/journal/PaperInformation.aspx?PaperID=50564#.VECnsVfHRK0

The reproductive and lamb mortality data (n = 187) of the Local and crosses of Dorper × Local ewes following natural controlled breeding in Ethiopia were analysed. Data were collected during 2009-2011 at Sirinka breeding, evaluation and distribution site, eastern Amhara region of Ethiopia. Breed, lamb sex, birth season, birth year, birth type and ewes’ parity were considered as fixed effects. Data analyses were performed using general linear model procedures. Breed was a significant source of variation: the local sheep attained faster the age at first lambing than the crossbred ewe lambs (469 ± 8.45 vs. 555 ± 6.25 days, p < 0.0001), whereas the crossbred ewes weighed more than the local sheep ewes at the age of first lambing (32.7 ± 0.63 vs. 22.8 ± 0.43 kg, p < 0.0001). Birth year had also important influence on the age and weight at first lambing of ewes. Ewes showed better performance during the later study years, differences attributed due to the improved management advantages in later years. The crossbred and local ewes were comparable in their litter size, despite the fact that the lambing interval of crossbred ewes was longer than the local ewes (306 ± 4.62 vs. 287 ± 2.38 days). Additionally, there was no significant difference in mortality rate between the two breeds. This study confirms that the local ewes had higher annual reproductive rate than that of the crossbred sheep ewes (1.49 ± 0.02 vs. 1.37 ± 0.01 lambs) under the same environmental conditions. The present results suggested that better management and breeding program probably will increase the productivity of the local sheep.
Cite this paper
Lakew, M. , Haile-Melekot, M. , Mekuriaw, G. , Abreha, S. and Setotaw, H. (2014) Reproductive Performance and Mortality Rate in Local and Dorper × Local Crossbred Sheep Following Controlled Breeding in Ethiopia. Open Journal of Animal Sciences, 4, 278-284. doi: 10.4236/ojas.2014.45035. 
 

[1] Hirpa, A. and Abebe, G. (2008) Economic Significance of Sheep and Goats. In: Yami, A. and Merkel, R.C., Eds., Sheep and Goat Production Handbook for Ethiopia, Branna Printing Enterprise, Addis Ababa, 2-24.
[2] Gatenby, R.M. (2002) Sheep. Macmillan Education, London.
[3] Sebsibe, A. (2008) Sheep and Goat Meat Characteristics and Quality. In: Yami, A. and Merkel, R.C., Eds., Sheep and Goat Production Handbook for Ethiopia, Branna Printing Enterprise, Addis Ababa, 325-340.
[4] Tibbo, M. (2006) Productivity and Health of Indigenous Sheep Breeds and Crossbreds in the Central Ethiopian Highlands. Ph.D. Thesis, Swedish University of Agricultural Sciences, Uppsala.
[5] Kosgey, I.S. and Okeyo, A.M. (2007) Genetic Improvement of Small Ruminants in Low-Input, Smallholder Production Systems: Technical and Infrastructural Issues. Small Ruminant Research, 70, 76-88. http://dx.doi.org/10.1016/j.smallrumres.2007.01.007
[6] Hassen, Y., Sölkner, J. and Fuerst-Waltl, B. (2004) Body Weight of Awassi and Indigenous Ethiopian Sheep and Their Crosses. Small Ruminant Research, 55, 51-56.
http://dx.doi.org/10.1016/j.smallrumres.2004.01.008
[7] Gizaw, S. (2008) Sheep Resources of Ethiopia: Genetic Diversity and Breeding Strategy. Ph.D. Thesis, Wageningen University, Wageningen.
[8] Lemma, S. (2009) Phenotypic Classification and Description of Indigenous Sheep Types in Amhara National Regional State of Ethiopia. M.Sc. Thesis, Haramaya University, Dire Dawa.
[9] Richard, K. (2010) Dorper Sheep and the Production of Lean Lamb in Arid Australia. International Specialised Skills Institute, Melbourne.
[10] Schoeman, S.J. (2000) A Comparative Assessment of Dorper Sheep in Different Production Environments and Systems. Small Ruminant Research, 36, 137-146. http://dx.doi.org/10.1016/S0921-4488(99)00157-1
[11] Olivier, J.J., Marais, P.G. and Cloete, J.A.N. (1984) Evaluation of Different Breed Crosses in the Development of a White Wooled Mutton Sheep: The Afrino. South African Journal of Animal Science, 14, 105-109. http://eurekamag.com/research/005/397/005397696.php
[12] SAS (Statistical Analysis System) (2003) Ver.9.1. SAS Institute Inc., Cary.
[13] Ibrahim, H. (1998) Small Ruminant Production Techniques. ILRI Manual 3. ILRI (International Livestock Research Institute), Nairobi.
[14] Gizaw, S. (2002) Genetic Evaluation of Menz and Awassi x Menz Crossbred Sheep in Ethiopia. M.Sc. Thesis, National Dairy Research Institute, Karnal.
[15] Taye, M., Abebe, G., Lemma, S., Gizaw, S., Mekoya, A. and Tibbo, M. (2011) Reproductive Performances and Survival of Washera Sheep under Traditional Management Systems at Yilmanadensa and Quarit Districts of the Amhara National Regional State, Ethiopia. Journal of Animal Science and Veterinary Advances, 10, 1158-1165.
[16] Mekuriaw, S. (2011) Performance Evaluation of Washera, Farta and Their Crossbred Sheep in Western Highlands of Amhara Region, Ethiopia. M.Sc. Thesis, Bahir Dar University, Bahir Dar.
[17] Abegaz, S. (2007) In-Situ Characterization of Gumuz Sheep under Farmers’ Management in North-Western Lowlands of Amhara Region. M.Sc. Thesis, Haramaya University, Dire Dawa.
[18] Belay, B. and Haile, A. (2009) Reproductive Performance of Traditionally Managed Sheep in the Southwestern Part of Ethiopia. Livestock Research for Rural Development, 21.
http://www.Irrd.org/Irrd21/9/bela21154.htm
[19] Gizaw, S. and Getachew, T. (2009) The Awassi x Menz Sheep Crossbreeding Project in Ethiopia: Achievements, Challenges and Lessons Learned. Proceedings of the Mid-Term Conference of the Ethiopian Sheep and Goat Productivity Improvement Program (ESGPIP), Hawassa, 13-14 March 2009, 53-62.
[20] Gbangboche, A.B., Adamou-Ndiaye, A.K.I., Youssao, M., Farnir, F., Detilleux, J., Abiola, F.A. and Leroy, P.L. (2006) Non-Genetic Factors Affecting the Reproduction Performance, Lamb Growth and Productivity Indices of Djallonke Sheep. Small Ruminant Research, 64, 133-142.
http://dx.doi.org/10.1016/j.smallrumres.2005.04.006
[21] Abegaz, S., Duguma, G., Nigussie, E., Gelmesa, U., Terefe, F. and Rege, J.E.O. (2002) Factors Affecting Reproductive Performance and Estimates of Genetic Parameters of Litter Size in Horro Sheep. Journal of Agricultural Science, 139, 79-85. http://dx.doi.org/10.1017/S0021859602002265
[22] Berhan, A. and Van Arendonk, J. (2006) Reproductive Performance and Mortality Rate in Menz and Horro Sheep Following Controlled Breeding in Ethiopia. Small Ruminant Research, 63, 297-303.
http://dx.doi.org/10.1016/j.smallrumres.2005.03.003
[23] Awgichew, K. (2000) Comparative Performance Evaluation of Horro and Menz Sheep of Ethiopia under Grazing and Intensive Feeding Condition. Ph.D. Dissertation, Humboldt University, Berlin.              eww141017lx
标签：

评论

发表评论

此博客中的热门博文

Electron Spin and Proton Spin in the Hydrogen and Hydrogen-Like Atomic Systems

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52202#.VIj7tMnQrzE Author(s) Stanisław Olszewski * Affiliation(s) Institute of Physical Chemistry, Polish Academy of Sciences, Warsaw, Poland . ABSTRACT The mechanical angular momentum and magnetic moment of the electron and proton spin have been calculated semiclassically with the aid of the uncertainty principle for energy and time. The spin effects of both kinds of the elementary particles can be expressed in terms of similar formulae. The quantization of the spin motion has been done on the basis of the old quantum theory. It gives a quantum number n = 1/2 as the index of the spin state acceptable for both the electron and proton ...
发表评论
阅读全文

A Study on the Seismic Isolation Systems of Bridges with Lead Rubber Bearings

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52566#.VJt06cCAM4 Author(s)   Woo-Suk Kim , Dong-Joon Ahn , Jong-Kook Lee Affiliation(s) School of Architecture, Kumoh National Institute of Technology, Gumi, Republic of Korea . ABSTRACT This study consists of the development and presentation of example of seismic isolation system analysis and design for a continuous, 3-span, cast-in-place concrete box girder bridge. It is expected that example is developed for all Lead-Rubber Bearing (LRB) seismic isolation system on piers and abutments which placed in between super-structure and sub-structure. Design forces, displacements, and drifts are given distinctive consideration in...
发表评论
阅读全文

Effects of Karate Training on Basic Motor Abilities of Primary School Children

“You never attack first in karate” might be the best conclusion of karate, which is a martial art practiced typically without weapons. It’s reported that karate has a long history for several hundred years, but the modern karate was spread to the whole Japan from Okinawa in the early part of 20th century. Now it has become one of the most widely practiced martial art forms in the world. Usually, it’s divided into Kihon, Kata and Kumite. As for the beginners, Kihon is more suitable for them because it involves basic techniques. Due to karate consists of dynamic offensive and defensive techniques using all parts of the body to their maximum advantage, the best understanding of true karate practice is the perfection of oneself through the perfection of the art. It not only develops coordination, quickens reflexes, and builds stamina, but also develops composure, a clearer thought process, deeper insight into one’s mental capabilities, and more self-confidence. So many researchers stu...
发表评论
阅读全文