Volume 8, Issue 15 (6-2017)                   Res Anim Prod 2017, 8(15): 177-184 | Back to browse issues page


XML Persian Abstract Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

(2017). Determination of Economic Values for Some Important Traits in Zel Sheep of Golestan. Res Anim Prod. 8(15), 177-184. doi:10.29252/rap.8.15.177
URL: http://rap.sanru.ac.ir/article-1-772-en.html
Abstract:   (4261 Views)

In this study a bio-economic model was used for a flock with 195 breeding ewes and 20 rams to determine economic values of important traits in Zel sheep of Golestan including litter size, pre-weaning survival, post-weaning survival, ewe survival, birth weight, weaning weight, yearling weight, ewe mature weight, dressing percentage, conception rate and wool weight. In this model, fixed environment was assumed and herd profit was estimated from difference between costs and revenues. Relative economic values of the traits were estimated based on wool weight. The highest economic value was found for litter size with relative economic value of 139.82. After litter size, the most important relative economic values were 3.81 and 3.66 for ewe survival and dressing percentage, respectively. Economic values of all traits were positive except for birth weight (-0.98). Sensitivity analysis of economic values were carried out for 20% increase and decrease in price levels of input (concentrate, forage) and output (meat, wool) system. Economic values​​ of all traits except for birth weight and wool weight were changed by changing the price of meat. The economic values of ewe mature weight, dressing percentage and wool weight did not change with change in price of concentrate and forage .Sheep farming system can increase in profits by increasing in the amount and value of product. As the highest economic values were found for amount and value of the products especially amount of products, in order to increase system profit it is better to select for these traits in a breeding program.

Full-Text [PDF 551 kb]   (4930 Downloads)    
Type of Study: Research | Subject: Special
Received: 2017/06/17 | Accepted: 2017/06/17

References
1. Abdolahy, H., S. Hasani, S. Zerehdaran, A.A. Shadparva and B. Mahmoudi. 2012. Determination of economic values for some important traits in Moghani sheep. Small Ruminant Research, 105: 161-169. [DOI:10.1016/j.smallrumres.2012.01.008]
2. Amer, P.R., G. Simm, M.G. Keane, M.G. Diskin and B.W. Wickham. 2001. Breeding objectives for beef cattle in Ireland. Livestock Production Science, 67: 223-239. [DOI:10.1016/S0301-6226(00)00201-3]
3. Conington, J., S.C. Bishop, A. Waterlouse and G. Simm. 2004. A bio-economic approach to derive economic values for pasture-based sheep genetic improvement programs. Journal of Animal Science, 82: 1290-1304. [DOI:10.2527/2004.8251290x]
4. Fewson, D. 1993. Definition of the breeding objective. Design of livestock breeding programmes. Animal Breeding and Genetics Unit, University of New England, Armidale, NSW, Australia.
5. Gebra, K.T., B. Fuerst-Waltlb, M. Wurzingerb, J. Philipssonc, G. Dugumad, T. Mirkenae, A. Hailef and J. Solknerb. 2012. Estimates of economic values for important indigenous Ethiopian sheep breeds. Small Ruminant Research, 105: 154-160. [DOI:10.1016/j.smallrumres.2012.01.009]
6. Gibson, J.P. 1995. An introduction the design and economic of animal breeding strategies. University of Guelph, Canada.
7. Groen, A.F., T. Steine, J.J. Colleau, J. Pederson, J. Pribyl and N. Reinsch. 1997. Economic value in dairy cattle breeding with special reference to functional traits. Report of EAAP Working Group. Livestock production science, 49: 1-21. [DOI:10.1016/S0301-6226(97)00041-9]
8. Haghdoost, A., A.A. Shadparvar, M.T. Beigi Nasiri and J. Fayazi. 2008. Estimates of economic values for traits of Arabic sheep in village system. Small Ruminant Research, 80: 91-94 (In Persian). [DOI:10.1016/j.smallrumres.2008.08.001]
9. Hazel, L.N. 1943. The genetic basis for constructing selection indexes. Genetics, 28: 476-490.
10. Hazel, L.N. and J.L. Lush. 1943. The efficiency of three methods of selection. Journal of Heredity, 33: 393-399 [DOI:10.1093/oxfordjournals.jhered.a105102]
11. Jones, H.E., P.R. Amer, R.M. Lewis and G.S. Emmans. 2004. Economic values for changes in carcass lean and fat weight at a fixed age for terminal sire breeds of sheep in the UK. Livestock Production Science, 89: 1-17. [DOI:10.1016/j.livprodsci.2004.02.002]
12. Khodaee, M. 2005. Determination of breeding objectives of Guilanian sheep by estimation of economic coefficients of production traits. M.Sc. Thesis, Guilan University, Guilan, Iran (In Persian).
13. Kosgey, I.S., J.A.M. Van Arendonk and R.L. Baker. 2003. Economic values for traits of meat sheep in medium to high production potential areas of the tropics. Small Ruminant Research, 50: 187-202. [DOI:10.1016/S0921-4488(03)00102-0]
14. Kosgey, I.S., J.A.M. Van Arendonk and R.L. Baker. 2004. Economic values for traits in breeding objectives for sheep in the tropics: impact of tangible and intangible benefits. Livestock production Science, 88: 143-160. [DOI:10.1016/j.livprodsci.2003.07.013]
15. Krupova, Z., M. Oravcora, E. Krupa and D. Peskovicova. 2008. Methods for calculating economic weight of important traits in sheep. Slovak Journal Animal Science, 41: 24-29.
16. Ponzoni, R.W. 1992. Genetic improvement of hair sheep in the tropics. FAO Animal Production and Health Papers 101, Rome, Italy168 pp.
17. Tibbo, M. 2006. Productivity and health of indigenous sheep breeds and crossbreds in the central Ethiopian highlands. Ph.D. Dissertation, Department of Animal Breeding and Genetics, Faculty of Veterinary Medicine and Animal Sciences. Swedish University of Agricultural Sciences (SLU), Uppsala, Sweden. http:// pub. epsilon. slu. se/1142/1/ Markos_ Tibbo_ corrected. Pdf Accessed on December 5, 2011.
18. Tolonea, M., V. Riggioa, D.O. Maizonc and B. Portolanoa. 2011. Economic values for production and functional traits in Valle del Belice dairy sheep using profit functions. Small Ruminant Research, 97: 41-47. [DOI:10.1016/j.smallrumres.2011.01.019]
19. Vatankhah, M. 2005. Defining a proper breeding scheme for Lori-Bakhtiari sheep in village system Ph.D. Thesis, Tehran University, Tehran, Iran (In Persian).
20. Wolfová, M., J. Wolf and M. Margetín. 2009. Estimation of economic values for traits of dairy sheep: II. Model application to a production system with one lambing per year. Journal of Dairy Science, 92: 2195-2203. [DOI:10.3168/jds.2008-1412]

Add your comments about this article : Your username or Email:
CAPTCHA

Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

© 2024 CC BY-NC 4.0 | Research On Animal Production

Designed & Developed by : Yektaweb